Somm AI

🍷

Train your palate.
Trust your instincts.

Somm AI guides you through the systematic blind tasting process used by professional sommeliers — one glass at a time.

Fill the Grid

Observe your wine systematically — appearance, nose, palate, conclusions. Work through each element without guessing yet. The grid trains you to look before you leap — deduction begins with observation.

Deduce

Your AI sommelier analyses your observations and guides your reasoning — connecting the clues to possible grapes, regions, and climates. Ask follow-up questions to go deeper.

Make Your Final Call

Commit to a grape, region, and approximate age. The best tasters aren't always right — they're always specific.

Reveal & Score

Enter the wine manually or photograph the label — AI reads it automatically. Get an instant accuracy score on your observations.

Reflect

Understand what you got right, what clues you missed, and one specific thing to focus on next time. Every tasting makes you sharper.

📖

New to deductive tasting?

Read through the before your first session — it covers every grid category, what to look for, and how each observation connects to deductive reasoning.

Choose your guidance style

Minimal

Flags your key clues only. No grape names, no regions. For when you want to work it out yourself.

Moderate

Suggests possible regions and grapes based on your observations. The sweet spot for most tastings.

SommAI

Full deductive analysis with 5 ranked deductions, confidence levels, and what would change the call.

Your history and progress are saved to your account across all devices.

Clarity

Color Intensity

Color (White)

Color (Red / Rosé)

Other Observations (select all that apply)

Tearing

Staining (red wines)

Condition

Intensity

Fruit Character — select a category, then ▼ to pick specific notes

Fruit Condition

Non-Fruit / Secondary / Tertiary — select a category, then ▼ to pick specific notes

Development

Your Nose Notes

Sweetness

Body

Texture (when apparent)

Acidity

Tannin

Tannin Texture

Alcohol

Palate Fruit — select a category, then ▼ to pick specific notes

Fruit Condition

Palate Non-Fruit — select a category, then ▼ to pick specific notes

Phenolic Bitterness

Finish Length

Flavor vs. Nose

Your Palate Notes

Climate

Age Range

Quality Level

Readiness

Overall Tasting Notes

Fill at least 3 fields to unlock

Tasting Guide

Based on the CMS Deductive Tasting Method. Click any category to expand.

👁 Appearance

Visual assessment takes only seconds but provides critical early clues about a wine's age, grape variety, and climate. Tilt the glass at 45° against a white background in good light. The CMS grid moves through clarity, color intensity, primary color, secondary color, rim variation, staining, tearing, and gas evidence.

Clarity / Visible Sediment

Clear · Hazy · Cloudy

What it is

Clarity describes the transparency and freedom from suspended particles. Most commercially produced wines are clear, having been filtered or fined. Haziness or cloudiness may indicate unfiltered winemaking, a fault, or refermentation in bottle. The CMS records this as Clear, Hazy, or Cloudy.

The CMS Scale

Clear

No visible particles. The standard for most commercial wines. Indicates stable winemaking.

Hazy

Slight cloudiness. May be intentional (unfiltered wine) or indicate instability. Not automatically a fault — cross-reference with the nose before judging.

Cloudy

Significant suspended matter. Combined with off-aromas, suggests a fault. In intentionally unfiltered wines, may be acceptable.

🍷 Practical Tasting Tip

Hold the glass up to a light source or against white paper. A hazy wine that smells clean is likely unfiltered — don't penalize it without checking the nose first. Always cross-reference clarity with the nose.

🔍 Deductive Value

Clarity alone tells you little about identity. Haziness with clean aromatics may indicate a natural or minimal-intervention producer, which can point toward certain regions and styles popular with that approach.

Intensity of Color

Translucent · Pale · Medium Minus · Medium · Medium Plus · Deep · Opaque

What it is

The depth or concentration of color, assessed by looking down through the glass from above. Influenced by grape variety, climate, skin contact time, and age. The 2024 CMS Americas grid uses a seven-point scale from Translucent to Opaque.

The CMS Scale

Translucent

Almost no color. Rare in still wines; common in very pale rosé or extremely delicate whites.

Pale

Light, transparent. Common in Pinot Grigio, Albariño, Pinot Noir, Grenache.

Medium Minus / Medium / Medium Plus

The broad middle range covering most commercial wines. Adjust with + and - to calibrate.

Deep

Dense, concentrated color, often opaque at the core. Common in Malbec, Syrah, Cabernet Sauvignon from warm climates.

Opaque

No light passes through. Only the thickest-skinned grapes from warm climates — Petite Sirah, Tannat, some Malbec.

🍷 Practical Tasting Tip

Look straight down into the glass over a white surface. Red wines generally lose color intensity with age; white wines gain it. Both facts are diagnostically useful.

🔍 Deductive Value

Deep color in a red = thick-skinned grape (Cabernet Sauvignon, Malbec, Syrah) and/or warm climate. Pale red = thin-skinned variety (Pinot Noir, Grenache, Nebbiolo) and/or cool climate or significant age. Pale whites suggest youth or cool climate; deep gold suggests age, oak, or warm climate.

Primary Color — White Wines

Water White · Straw · Yellow · Gold

What it is

The base hue of a white wine, assessed by tilting the glass at 45° against a white background. White wines deepen as they age and oxidize, or due to winemaking choices like barrel fermentation. The 2024 CMS Americas grid uses four primary white wine colors.

The CMS Scale

Water White

Almost colorless. Very young or neutral varieties: Muscadet, Pinot Grigio, Vinho Verde, unoaked Grüner Veltliner.

Straw

Pale yellow. Youthful, cool-climate wines: young Sauvignon Blanc, Riesling, Chablis, unoaked Chardonnay.

Yellow

Clean mid-yellow. Common in everyday dry whites with some development: Pinot Gris, mid-weight Chardonnay.

Gold

Deep yellow-gold. Indicates age, oak influence, or warm climate: oaked Chardonnay, aged white Burgundy, Viognier, White Rioja.

🍷 Practical Tasting Tip

White wines deepen in color as they age — Water White → Straw → Yellow → Gold. A gold color with no oak aromas strongly suggests age. Secondary colors (green, copper) appear at the rim and provide additional clues.

🔍 Deductive Value

Straw with green secondary color = youth and high acidity, pointing toward cool-climate whites (Chablis, Sancerre, young Riesling). Gold with no oak = significant age. Gold with oak aromatics = barrel fermentation or aging (Chardonnay, White Rioja, white Rhône).

Primary Color — Red Wines

Purple · Ruby · Garnet

What it is

The base hue of a red wine. Red wines move from blue-purple in youth toward orange-brown with age as anthocyanins (color pigments) polymerize and eventually precipitate as sediment. The 2024 CMS Americas grid uses three primary red wine colors.

The CMS Scale

Purple

Blue-red. Indicates youth and/or thick-skinned, deeply pigmented grapes: Malbec, young Syrah, young Cabernet Sauvignon.

Ruby

Clear red. The most common color for young to mid-aged reds: Pinot Noir, Merlot, young Sangiovese.

Garnet

Red with a slight orange or brick tint. Indicates development and age: mature Cabernet Sauvignon, aged Nebbiolo, Rioja Reserva/Gran Reserva.

🍷 Practical Tasting Tip

The shift from ruby toward garnet is one of your clearest age indicators on sight. Secondary color at the rim (orange, brown) develops faster than the core — a wine can have a ruby core with a garnet-orange rim, which is highly diagnostic of age.

🔍 Deductive Value

Purple = youth and/or thick skin. Ruby = young to moderate age, wide range of varieties. Garnet core = meaningful age (typically 5+ years). A garnet wine with orange rim tones is an important age signal pointing toward longer aging or older vintage.

Secondary Color(s)

White: Silver · Green · Copper · Gold · Brown | Red: Blue · Magenta · Ruby · Orange · Garnet · Brown

What it is

Secondary colors are the hues visible at the rim or edge of the wine when tilted at 45°. They often differ from the core and provide important clues about age, variety, and winemaking. The CMS grid distinguishes secondary colors for both white and red wines.

White Wine Secondary Colors

Silver / Green

Youth and high acidity. Green rim = young, cool-climate white. Classic for Sauvignon Blanc, young Riesling, Chablis.

Copper

Skin contact (orange wine), or certain aromatic varieties (Pinot Gris with extended skin contact). Also appears in aged rosé.

Gold / Brown

Significant age or oxidative winemaking. Brown tints in a white indicate oxidation or very advanced age.

Red Wine Secondary Colors

Blue / Magenta

Youth and high anthocyanin content. Youthful Malbec, Syrah, Cabernet Sauvignon.

Orange / Garnet

The most diagnostically important secondary colors in reds. Orange rim = meaningful age, typically 5-10+ years. Garnet at the rim in a young wine suggests a variety prone to early color evolution (Grenache, Pinot Noir).

Brown

Advanced age or oxidation. Brown rim on a red = significant age or possible oxidative concern.

🍷 Practical Tasting Tip

The rim is where age shows first. Tilt your glass over white paper and focus on the very edge — the gradient from core to rim tells you more about age than the core alone. A wide color gradient generally indicates more age.

🔍 Deductive Value

Green secondary in a white = youth + cool climate + high acidity. Orange secondary in a red = age, typically 7+ years. Brown secondary in either = oxidation or very advanced age. Blue/magenta in a red = very young, deeply pigmented variety.

Rim Variation

Red Wines Only · Yes or No

What it is

Rim variation describes a visible gradation of color from the core to the rim — the center is deeper and the edge is lighter, often showing orange or brown tones. It is assessed in red wines only. The CMS records this as Yes or No.

What to Look For

Consistent color from center to edge. Indicates youth. Color pigments haven't yet begun to polymerize and shift.

Yes — Present

A visible color gradient with the rim showing orange, garnet, or brown tones different from the core. The more pronounced the gradient, the more age the wine has typically seen.

🍷 Practical Tasting Tip

Hold the glass at 45° over a white surface and look at the gradient from the deepest center to the very edge. The color at the meniscus is your clearest age indicator. The more pronounced the gradient and the more orange/brown the rim, the older the wine.

🔍 Deductive Value

Rim variation present = age. Thin-skinned varieties (Pinot Noir, Grenache, Nebbiolo) show rim variation earlier than thick-skinned varieties (Cabernet Sauvignon, Syrah). Rim variation in a pale red can indicate 4-5 years; in a deep red, often 7-10+ years.

Staining

Red Wines Only · None · Light · Medium Minus · Medium · Medium Plus · Heavy

What it is

Staining refers to the degree to which a red wine leaves a colored residue on the inside of the glass as it flows. Caused by concentration of color pigments (anthocyanins) and tannins. The CMS grid assesses staining in red wines only on a six-point scale.

The CMS Scale

None

The glass is clean after the wine flows. Indicates low pigmentation — thin-skinned varieties, cool climates, or significant age where pigments have precipitated as sediment.

Light to Medium

A faint to moderate wash of color left on the glass. The range covering most commercially made reds.

Medium Plus to Heavy

The glass is noticeably stained. Indicates high concentration of pigment and extract. Most commonly associated with deeply pigmented varieties from warm climates.

🍷 Practical Tasting Tip

Swirl the wine gently and watch as it flows back down the inside of the glass. Heavy staining is most visible in Syrah/Shiraz, Malbec, Petite Sirah, and young Cabernet Sauvignon from warm climates.

🔍 Deductive Value

Heavy staining = high extract and pigment concentration, pointing toward thick-skinned varieties from warm climates. No staining in a ruby-colored wine may indicate a thin-skinned variety (Pinot Noir, Grenache) or an aged wine where pigments have precipitated.

Tearing

Light · Medium Minus · Medium · Medium Plus · Heavy

What it is

Tearing (also called legs or viscosity) refers to the streams of wine that form on the inside of the glass after swirling, caused by the Marangoni effect — the difference in surface tension between alcohol and water. The speed and thickness of tears correlates with alcohol level and, to a lesser degree, residual sugar.

The CMS Scale

Light

Thin, quickly-forming tears that run fast. Indicates lower alcohol. Cool-climate wines and lighter-bodied styles.

Medium Minus / Medium / Medium Plus

Moderate tears. The range covering most commercial wines.

Heavy

Thick, slow-moving tears that cling to the glass. Indicates higher alcohol and/or significant residual sugar. Warm-climate wines, fortified styles, late-harvest wines.

🍷 Practical Tasting Tip

Swirl the glass and watch how the wine returns down the sides. Thin, fast tears = lower alcohol. Thick, slow tears = higher alcohol. This is a useful early hypothesis before the palate confirms. Note that tears are influenced by glass cleanliness and temperature.

🔍 Deductive Value

Heavy tears = higher alcohol, pointing toward warm-climate regions (Southern Rhône, Napa, Barossa, Châteauneuf-du-Pape) or residual sugar. Light tears = lower alcohol, supporting cool-climate hypotheses (Mosel, Loire, Burgundy). Always confirm on the palate.

Gas Evidence

Yes or No

What it is

Gas evidence is the presence of visible CO₂ bubbles in a still wine. Sparkling wines are assessed separately. In still wines, gas evidence is a binary CMS observation — Yes or No — and always warrants further investigation.

What It Means

No (absent)

Standard for most still wines. No diagnostic significance on its own.

Yes (present)

Bubbles visible, either clinging to the glass or rising through the wine. Possible explanations: intentional slight pétillance (Vinho Verde, Muscadet sur lie), very recent bottling, or a fault (refermentation in bottle).

🍷 Practical Tasting Tip

A few bubbles clinging to the glass in a cool, recently opened wine may be dissolved CO₂ from bottling — not necessarily a fault. Cross-reference with the nose. If the wine smells clean, a small amount of gas is likely intentional or harmless.

🔍 Deductive Value

Gas in a still wine + clean aromatics = likely Vinho Verde, Muscadet sur lie, or a young wine bottled with retained CO₂ for freshness. Gas + off-aromas = possible refermentation fault. Gas + sweetness = possible incomplete fermentation or deliberate slight sweetness.

👃 Nose

The nose is the most information-rich stage of the tasting. Always smell before swirling (first impression), then swirl and smell again — volatilisation releases bound aroma compounds. The CMS nose covers faults, aromatic intensity, age assessment, fruit aromas, fruit condition, non-fruit aromas from the grape and from winemaking, earth, mineral, and oak.

Minor Presence of Faults

Note when apparent · Barnyard · Nail Polish Remover · Caramel · Nuts · Dried Fruit · Struck Match · Balsamic Vinegar

What it is

Wine faults are detectable off-aromas caused by microbial activity, chemical instability, or winemaking errors. The CMS grid notes fault indicators only when apparent. Minor faults at low concentrations are sometimes considered acceptable stylistic elements; major faults render a wine flawed.

CMS Fault Indicators

Barnyard

Brett (Brettanomyces) — a yeast producing barnyard, leather, horse sweat aromas. At low levels, some find it adds complexity in aged Burgundy and Rhône. At high levels it masks fruit and is a fault.

Nail Polish Remover

Ethyl acetate — volatile acidity. A sharp, solvent-like aroma. In small amounts present in all wine; at high levels a clear fault.

Caramel / Nuts

Can indicate oxidation or Maderization — unintentional oxygen exposure. Distinct from intentional oxidative styles (Sherry, Vin Jaune).

Struck Match

Reduction — excess sulfur compounds (H₂S, mercaptans). Often dissipates with swirling and aeration; if persistent, it is a fault.

Balsamic Vinegar

Volatile acidity — acetic acid bacteria. At low levels, adds complexity; at high levels, a significant fault.

🍷 Practical Tasting Tip

If you detect any of these on the first nose, swirl vigorously and smell again. Struck match and some reductive characters will blow off with aeration. If the fault persists, note it clearly. In a tasting exam, continue through the grid even with a faulty wine.

🔍 Deductive Value

Brett at low levels is more common in certain regions (Rhône, Burgundy) and natural wines. Oxidation notes in a white + nutty character = deliberate oxidative style (Sherry, Vin Jaune) or a wine past its peak. Reduction that blows off = often minimal-intervention winemaking.

Aromatic Intensity

Delicate · Medium Minus · Medium · Medium Plus · Powerful

What it is

How strongly the wine expresses its aromas, independent of what those aromas are. Assessed after swirling. A wine can be delicate but complex, or powerful but simple. Intensity is separate from quality.

The CMS Scale

Delicate

Faint aromas requiring concentration to detect. Common in Muscadet, Pinot Grigio, cool-climate Riesling, or old wines where primary fruit has faded.

Medium Minus / Medium / Medium Plus

The normal range for most wines. Medium is the baseline for everyday commercial wines.

Powerful

Aromas that jump out of the glass without needing to bring the nose close. Common in aromatic varieties (Gewurztraminer, Muscat, Viognier) and warm-climate, ripe wines.

🍷 Practical Tasting Tip

Hold the glass about 6 inches from your nose. If you can smell the wine clearly from there, it's powerful. If you need to put your nose into the glass to find anything, it's delicate. Medium is comfortable sniffing distance.

🔍 Deductive Value

Powerful aromatics in a white = likely an aromatic variety (Gewurztraminer, Viognier, Muscat, Torrontés) or warm-climate expression. Delicate aromatics with developed tertiary character = classic restrained Old World style. Medium intensity covers the widest range and is least diagnostic on its own.

Age Assessment

Youthful · Developing (showing age) · Vinous (aged)

What it is

An assessment of where the wine sits in its aromatic development — from primary fruit-dominant youth through the complex interplay of primary and tertiary aromas in development, to the fully tertiary, vinous character of a properly aged wine. The 2024 CMS Americas grid uses three stages.

The CMS Scale

Youthful

Dominated by primary fruit aromas — fresh, direct, and varietal. Little to no tertiary development.

Developing (showing age)

A blend of primary fruit and tertiary aromas — some development (dried fruit, leather, earthiness) alongside remaining freshness. Often the most interesting stage.

Vinous (aged)

Dominated by tertiary aromas — dried fruit, leather, earth, mushroom, tobacco, petrol. Primary fruit largely faded. The word vinous in CMS context specifically means the wine smells of aged wine character rather than fresh fruit.

🍷 Practical Tasting Tip

Cross-reference age assessment on the nose with sight observations. Color showing significant rim variation but a youthful nose suggests a thick-skinned, deeply pigmented variety. Fully developed nose but deep color still = a long-lived variety in a good vintage.

🔍 Deductive Value

Vinous character + orange rim = age (typically 7-10+ years). Youthful nose + orange rim = warm-climate, deeply pigmented variety showing premature color evolution. Developing character is the most common exam scenario — note which tertiary aromas are emerging, as they often point toward specific grapes (petrol = Riesling, tar/roses = Nebbiolo, mushroom = aged Pinot Noir).

Fruit Character — Nose

White: Tart Citrus · Sweet Citrus · Apple/Pear · Stone Fruit · Tropical · Melon | Red: Red · Blue · Black

What it is

Primary fruit aromas are derived directly from the grape variety and its growing conditions. The CMS grid groups white wine fruits into six categories and red wine fruits into three color-based groups. The specific sub-notes within each category become diagnostically useful.

White Wine Fruit Categories

Tart Citrus

Lemon, lime, grapefruit. High-acid, cool-climate indicators. Riesling, Sauvignon Blanc, Albariño, Chablis.

Sweet Citrus

Orange, mandarin, blood orange. Warmer expression of citrus. Viognier, warm-climate Chardonnay, some Grenache Blanc.

Apple / Pear

Green apple (cool, high acid — Chablis, unoaked Chardonnay), ripe apple (moderate Chardonnay), pear (Pinot Gris, Viognier).

Stone Fruit

Peach, apricot, nectarine. Often indicates warmer growing conditions or riper harvest. Viognier, ripe Chardonnay, Roussanne.

Tropical

Mango, pineapple, passion fruit, guava. Warm climate indicator or certain thiols (Sauvignon Blanc, New Zealand). Also: lychee (Gewurztraminer), orange blossom/grape (Muscat).

Melon

Honeydew, cantaloupe. Common in Pinot Gris, some Viognier, and Grenache Blanc.

Red Wine Fruit Categories

Red Fruit

Strawberry, raspberry, red cherry, cranberry, red plum. Cool climates, thin-skinned varieties, or moderate ripeness: Pinot Noir, Grenache, cool-climate Syrah, Sangiovese, Barbera.

Blue Fruit

Blueberry, blue plum. Intermediate ripeness: Syrah, Malbec, Mourvèdre, some Cabernet Sauvignon.

Black Fruit

Blackcurrant (cassis), blackberry, black cherry, black plum. Warm climate or thick-skinned varieties: Cabernet Sauvignon, Malbec, warm-climate Syrah/Shiraz, Petite Sirah.

🍷 Practical Tasting Tip

The color of the fruit in a red wine is one of your most reliable climate and variety indicators. Red = cool or moderate climate, thinner skin. Black = warm climate or thick skin. When you detect both red and black fruit together, you are likely dealing with a moderate climate or a blending variety.

🔍 Deductive Value

Red fruit in a red = cool to moderate climate, often thin-skinned variety. Black fruit = warm climate or thick-skinned variety. Tropical fruit in a white = warm climate or specific variety markers (passion fruit = Sauvignon Blanc, lychee = Gewurztraminer). Tart citrus = cool climate, high acidity. Stone fruit = moderate to warm climate.

Fruit Condition

Tart · Ripe · Fresh · Baked · Stewed · Dried/Desiccated · Bruised · Jammy · Juicy · Candied · Liqueur · Oxidized

What it is

Fruit condition describes the perceived ripeness and state of the fruit aromas, independent of the specific fruit type. It is one of the most diagnostically powerful observations in the tasting. The CMS grid uses twelve condition descriptors ranging from unripe to oxidized, and specifically asks on the palate whether fruit condition has "turned tart."

The CMS Scale

Tart

Underripe, sharp, green-edged fruit. Indicates cool climate, early harvest, or a naturally high-acid variety: Chablis, Mosel Riesling, cool-vintage Burgundy.

Fresh / Ripe

The ideal range for most wines — fruit is fully developed without being overripe. Indicates balanced growing conditions and appropriate harvest timing.

Baked / Stewed

Cooked fruit character — jam, compote, fruit cake. Indicates very warm climate, late harvest, or warm vintage: Southern Rhône, Barossa, Napa in warm years.

Dried / Desiccated

Dried fruit character — raisins, prunes, figs, dates. Points toward fortified/late-harvest style, passito winemaking, or significant age: Amarone, Vin Santo, aged wines.

Bruised

Softened, slightly oxidized fruit. Like a bruised apple or overripe banana. Often indicates a wine past its peak or approaching oxidation.

Jammy / Juicy / Candied

Very ripe to over-ripe, high sugar character. Jammy = cooked jam concentration (warm climate). Juicy = fresh, forward ripe fruit. Candied = confected, sweet fruit note (late-harvest/dessert styles).

Liqueur / Oxidized

Fortified or late-harvest character (liqueur), or unintentional oxidation. Liqueur-style fruit in a fortified wine is correct; oxidized fruit in a supposedly fresh wine is a fault or sign of age.

🍷 Practical Tasting Tip

Fruit condition is best understood as a ripeness spectrum. The CMS specifically asks whether fruit condition has "turned tart on the palate" — a valuable check that catches wines where palate acidity overwhelms perceived ripeness. This shift from ripe nose to tart palate is an important diagnostic signal worth noting explicitly.

🔍 Deductive Value

Tart = cool climate or high-acid variety. Ripe/fresh = moderate climate and harvest timing. Baked/stewed = warm climate or warm vintage. Dried/desiccated = late-harvest, passito, fortified style, or age. Jammy = warm climate or ripe New World style. Fruit condition is one of your primary climate calibration tools — use it alongside acidity and alcohol to triangulate origin.

Non-Fruit Aromas — From the Grape

Flowers · Herbs · Spice · Honey · Petrol · Eucalyptus · Chocolate · Mocha · Ginger

What it is

Non-fruit aromas derived directly from the grape variety and its growing conditions. These are primary aromas — they come from the grape itself, not from fermentation or aging. The CMS lists these separately from winemaking-derived aromas under "From Grape(s)."

Key Grape-Derived Aromas

Flowers

Violet (Syrah, Malbec, Nebbiolo), rose (Gewurztraminer, Nebbiolo), orange blossom/jasmine (Viognier, Muscat, Torrontés), elderflower (Sauvignon Blanc). Floral intensity is a highly diagnostic varietal marker.

Green Bell Pepper / Asparagus / Celery / Grass / Herbs

Pyrazines — present in underripe Cabernet Sauvignon, Cabernet Franc, Sauvignon Blanc, and Merlot. Green pepper is highly diagnostic of Cabernet Franc (Loire) and underripe Cabernet Sauvignon. Grass/herbs = cool-climate Sauvignon Blanc.

Tobacco

Varietal marker for Cabernet Sauvignon and Tempranillo. Also appears in aged wines of many types as a tertiary character.

Black Pepper / White Pepper

Rotundone — the defining spice marker of Northern Rhône Syrah (black pepper) and Grüner Veltliner (white pepper). Highly diagnostic for both varieties.

Ginger

Appears as a grape-derived spice note in Gewurztraminer and some Grenache, as well as in oxidative styles. Also a CMS-listed note under From Grape(s) in the 2024 grid.

Honey

Common in off-dry to sweet whites, botrytized wines, and aged white wines (Riesling and Chenin Blanc). Can indicate ripeness or residual sugar.

Petrol / Kerosene

TDN — the defining aged Riesling compound. Develops with bottle age, particularly in warmer vintages. Highly diagnostic: petrol = aged Riesling (most likely).

Eucalyptus

Found in certain regions — notably Napa Valley Cabernet Sauvignon and Australian Shiraz. Can indicate proximity of eucalyptus trees in the vineyard or a specific terroir marker.

Chocolate / Mocha

Grape-derived dark character common in thick-skinned, warm-climate varieties: Malbec, Petite Sirah, Zinfandel, warm-climate Syrah.

🍷 Practical Tasting Tip

Focus on identifying your impact compounds — the 2-3 most distinctive non-fruit aromas that narrow the field most significantly. Black pepper is nearly diagnostic for Northern Rhône Syrah. Petrol is nearly diagnostic for aged Riesling. Violet is strongly associated with Syrah, Malbec, and Nebbiolo. Memorize these anchors for your deductive chain.

🔍 Deductive Value

Floral + lychee = Gewurztraminer. Violet = Syrah, Malbec, or Nebbiolo. Black pepper = Northern Rhône Syrah. White pepper = Grüner Veltliner. Petrol = aged Riesling. Green pepper = Cabernet Franc or underripe Cabernet Sauvignon. Elderflower + gooseberry = Sauvignon Blanc. These are among the most reliable varietal markers in deductive tasting.

Non-Fruit Aromas — From Winemaking

Bread Dough · Yeast · Beer · Cheese Rind · Cream · Sour Cream · Butter · Yogurt · Peanut Shell · Toast · Marzipan · Stems · Bubblegum · Cigar Box

What it is

Secondary aromas derived from fermentation and winemaking processes — not from the grape itself. These include aromas from malolactic fermentation, lees contact, whole-bunch fermentation, carbonic maceration, and other winemaking decisions. The 2024 CMS grid lists these explicitly under "From Winemaking."

Key Winemaking-Derived Aromas

Butter / Cream / Yogurt / Sour Cream

Malolactic fermentation (diacetyl). Indicates completed MLF, most common in Chardonnay, white Rioja, and many reds. Butter is the most obvious MLF marker; yogurt/sour cream indicate MLF with less diacetyl.

Bread Dough / Yeast / Beer / Toast

Lees contact and autolysis. Extended sur lie aging releases these compounds as yeast cells break down. Classic in Champagne, Crémant, Muscadet sur lie, and extended-aging Chardonnay.

Cheese Rind / Peanut Shell

Advanced lees character. Found in very extended sur lie aging — certain Champagne, aged Muscadet, and some Jura whites. Adds savory, umami-like complexity.

Marzipan

Almond-like sweetness from lees or from certain oxidative styles. Also appears in some aged whites and dessert wines.

Stems / Green

Whole-bunch fermentation — inclusion of stems adds leafy, herbal, savory character. Common in traditional Burgundy, Northern Rhône, and some Beaujolais.

Bubblegum / Candy

Carbonic maceration — produces isoamyl acetate, giving a distinctive banana/bubblegum note. Classic Beaujolais Nouveau marker.

Cigar Box / Cedar

French oak aging — a refined woody spice character distinct from vanilla (American oak). Classic in Bordeaux, Rioja, and Cabernet Sauvignon aged in French barriques.

🍷 Practical Tasting Tip

When you smell butter or cream on a white wine, immediately think: malolactic fermentation. When you smell bread dough or brioche, think: lees contact. When you smell bubblegum, think: carbonic maceration (Beaujolais). These are direct fingerprints of winemaking decisions — valuable clues about both style and origin.

🔍 Deductive Value

Butter + vanilla + cream = MLF and oak, pointing toward Chardonnay (Burgundy, California, white Rioja). Brioche + fine persistent bubbles = traditional method sparkling (Champagne, Crémant). Bubblegum = carbonic maceration, strongly suggesting Beaujolais. Cigar box/cedar = French oak, pointing toward Bordeaux varieties or Rioja. Remember: winemaking markers can be applied to any grape, so don't let them override clear varietal evidence.

Malolactic Fermentation

Butter · Cream · Yogurt · Crème Fraîche · Lactic / Milky · Sour Cream

What it is

Malolactic fermentation (MLF) is a secondary bacterial process that converts sharp malic acid into softer lactic acid. It occurs in virtually all red wines and is a deliberate winemaking choice in many whites — particularly Chardonnay. The by-product diacetyl creates the characteristic butter and cream aromas.

Key Malolactic Fermentation Aromas

Butter / Cream

Diacetyl — the primary aromatic marker of MLF. Classic in Burgundy-style Chardonnay, California Chardonnay, white Rioja. Intensity correlates with degree of MLF.

Yogurt / Crème Fraîche

Lactic notes — softer than butter. Indicates MLF with less diacetyl. Common in cool-climate Chardonnay and some Chenin Blanc.

Lactic / Milky

Subtle dairy quality. Can appear in reds undergoing MLF alongside primary fermentation. Common in Pinot Noir and Merlot.

🍷 Practical Tasting Tip

On the palate, MLF wines feel rounder and softer — the acidity is present but has a creamy texture rather than a sharp bite. If a wine smells buttery and feels round on the palate, MLF is almost certain. Contrast Chablis (no MLF, high acidity, lean and linear) with white Burgundy village level (MLF, softer, rounder).

🔍 Deductive Value

Butter + cream + round palate = MLF completed, likely Chardonnay or white Rioja. Absence of MLF notes in a white = unoaked, cool-climate, or winemaker choice to preserve freshness (Muscadet, Chablis, Sancerre, Riesling). MLF in a red is universal and not diagnostically useful on its own.

Lees Aging

Brioche · Biscuit · Toast · Autolytic/Yeasty · Bread Dough · Pastry

What it is

Lees are the dead yeast cells left after fermentation. Aging wine on its lees (sur lie) adds complexity through autolysis — the breakdown of yeast cells releases compounds creating toasty, bready, and biscuity aromas. Most associated with Champagne and traditional method sparkling wines, but also important in Muscadet, Burgundy, and extended-aging still whites.

Key Lees Aromas

Brioche / Pastry

Classic autolytic character in traditional method sparkling. The longer the lees contact, the more pronounced. Champagne NV = subtle; aged Blanc de Blancs = pronounced.

Biscuit / Toast

Slightly drier lees character. Common in aged Champagne, Crémant, Cava Reserva, and extended-aging still whites.

Bread Dough / Yeasty

Fresh, alive autolytic note. Found in young Champagne or wines still on lees. Also present in Muscadet sur lie and some aged Burgundy.

🍷 Practical Tasting Tip

In sparkling wines, lees character is your primary indicator of production method and quality tier. Fine, persistent bubbles + brioche = traditional method. Large bubbles + fresh fruit, no brioche = tank method (Prosecco). In still whites, lees notes + saline minerality = Muscadet sur lie.

🔍 Deductive Value

Brioche + fine mousse = traditional method sparkling, likely high quality or extended aging. Brioche in a still white = extended lees contact, pointing toward serious Chardonnay or Muscadet sur lie. The intensity of autolytic character correlates with lees contact time.

Earth

Forest Floor · Mushrooms/Truffles · Potting Soil · Compost

What it is

Organic earth aromas derived from the vineyard's soil composition, microbial life, and the aging process. The CMS grid separates Earth from Mineral, treating them as distinct aroma categories. Earth aromas develop with age and are more commonly associated with cool-climate, Old World winemaking traditions.

CMS Earth Descriptors

Forest Floor

Damp leaves, undergrowth, fallen wood. Classic in aged Burgundy, Barolo, and aged Bordeaux. One of the hallmark tertiary aromas of Old World red wines.

Mushrooms / Truffles

Earthy umami character. More pronounced in aged Pinot Noir (Burgundy), Nebbiolo (Barolo/Barbaresco), and some aged Bordeaux.

Potting Soil / Compost

Fresh earth character. Common in young to mid-aged Old World reds. Can indicate volcanic or clay-heavy soils. Also associated with Brett at low levels.

🍷 Practical Tasting Tip

Earth aromas tend to increase with age and are more common in Old World wines where terroir expression is emphasized. In a blind tasting, earth character alongside fading primary fruit strongly suggests an older, Old World wine.

🔍 Deductive Value

Forest floor + red fruit + fine tannin = aged Pinot Noir (Burgundy). Truffle/mushroom + tar + roses = Nebbiolo (Barolo/Barbaresco) with age. Earth notes generally support Old World origin, with France and Italy being the most common associations.

Mineral

Mineral · Wet Stone · Limestone · Chalk · Slate · Flint

What it is

Inorganic mineral aromas associated with specific soil types and terroir. The CMS grid lists six specific mineral descriptors and separates Mineral from Earth. Mineral character is highly valued in Old World wines and correlates with specific geological compositions.

CMS Mineral Descriptors

Wet Stone / Mineral

The broadest mineral descriptor — a clean, inorganic, almost electric quality. Classic in Chablis, Sancerre, Pouilly-Fumé, and German Riesling.

Limestone / Chalk

Soft, powdery mineral character. Associated with chalk and limestone soils — Champagne, Chablis, Sancerre, English sparkling wine.

Slate

A harder, denser mineral quality. Highly characteristic of Mosel Riesling grown on slate soils.

Flint / Gunflint

Struck flint — a sharp, almost smoky mineral quality. Most associated with Sancerre and Pouilly-Fumé (silex/flint soils). Highly diagnostic of the Central Loire.

🍷 Practical Tasting Tip

Minerality is most detectable on the palate as a sensation (saline, electric, tension) rather than a distinct aroma. On the nose, look for a clean, inorganic quality that sits behind the fruit.

🔍 Deductive Value

Flint/gunsmoke = strong indicator of Central Loire Sauvignon Blanc (Sancerre, Pouilly-Fumé). Slate = Mosel Riesling. Wet stone/chalk = Chablis, Champagne, English sparkling. Mineral character generally supports a cool-climate, Old World origin.

Oak

Present: Yes or No · Intensity: Low / Medium / High · Type: French / American / Eastern European · Descriptors: Toast · Smoke · Vanilla · Cinnamon · Clove · Nutmeg · Cardamom · Coffee · Chocolate · Dill · Coconut · Caramel · Cedar

What it is

Oak aging adds aromas and flavors from the wood itself, varying by toast level, barrel size, age of barrel, and origin. The CMS grid asks three questions: Is new oak present? What is the intensity? What type? New oak imparts the most flavor; older barrels provide oxygen exchange with less direct flavor contribution.

CMS Oak Descriptors

Toast / Smoke

From barrel toasting. Common to both French and American oak at medium-high toast levels.

Vanilla / Cinnamon / Clove / Nutmeg / Cardamom

Spice compounds from oak. More pronounced in American oak (vanilla, coconut, dill) than French (spice, cedar). American oak gives a sweeter, more obvious oak character.

Coffee / Chocolate

Heavily toasted oak. Common in American oak-aged wines (Rioja, some California reds, Australian Shiraz).

Dill / Coconut

Highly characteristic of American oak specifically. If you smell dill or coconut in a red wine, American oak is almost certain.

Cedar / Caramel

French oak aging. Cedar/cigar box is the classic French oak marker in red wines. Caramel can develop from very ripe grapes combined with oak aging.

🍷 Practical Tasting Tip

American oak: vanilla, coconut, dill, sweet spice. French oak: cedar, cigar box, subtle spice, toast. The distinction matters diagnostically — American oak in a red wine points toward certain regions (traditional Rioja, some Argentine and Australian wines) and away from others (most Burgundy, most Bordeaux).

🔍 Deductive Value

Vanilla + coconut + dill = American oak, narrowing the field to traditional Rioja, some Argentine Malbec, Australian Shiraz, or American wines. Cedar + cigar box = French oak, associated with Bordeaux, most Burgundy, and premium wines globally. High oak intensity + high alcohol + ripe fruit = warm climate, likely New World or warm-region Old World. No oak = unoaked style, or aged wine where oak has fully integrated.

👅 Palate Structure

The palate confirms and extends what the nose revealed, and critically adds structural information unavailable on the nose: precise sweetness levels, tannin volume and texture, phenolic bitterness, and the relationship between acidity and alcohol that helps pinpoint climate. Take a generous sip, move the wine around your mouth, and assess each element separately before integrating into your conclusion.

Sweetness

Bone Dry · Dry · Dry with Slight Residual Sugar · Off-Dry · Medium-Sweet · Sweet · Lusciously Sweet

What it is

Sweetness is the perception of residual sugar on the palate, detected on the tip of the tongue. It is distinct from the perception of ripe or fruity character — a bone-dry wine with very ripe fruit can seem sweet on the nose but register as bone dry on the palate. The CMS uses a seven-point sweetness scale.

The CMS Scale

Bone Dry

No perception of residual sugar whatsoever. Under 1 g/L RS. Most dry table wines — Burgundy, Bordeaux, Chablis, Barolo, dry Riesling.

Dry

Technically dry but with very subtle softness. Under 4 g/L RS. The most common descriptor for dry table wines.

Dry with Slight Residual Sugar

A specific CMS category for wines dry in style but with perceptible (though restrained) sweetness — typically 4-12 g/L RS. Certain Alsatian wines, some German Spätlese in warmer years.

Off-Dry

Clearly perceptible sweetness that does not dominate. 12-35 g/L RS. Demi-sec Vouvray, many German Spätlese, some Gewurztraminer.

Medium-Sweet / Sweet

Sweetness is a defining characteristic. 35-120 g/L RS. Auslese, Sauternes, late-harvest Riesling, Tokaji.

Lusciously Sweet

Very high residual sugar — thick, viscous sweetness. Trockenbeerenauslese, Eiswein, very sweet Sauternes.

🍷 Practical Tasting Tip

Sweetness can be masked by high acidity (a Mosel Spätlese can seem drier than it is) or amplified by low acidity. Always note sweetness before assessing acidity — acidity assessment can distort sweetness perception if assessed in the wrong order.

🔍 Deductive Value

Off-dry or sweet in a white with high acidity = German Riesling or Alsatian wine. Bone dry + high acidity + low alcohol = cool-climate white. Lusciously sweet + botrytis character = Sauternes, TBA, or Tokaji Aszú. Off-dry in a red = unusual and narrows the field significantly.

Acidity

Low · Medium Minus · Medium · Medium Plus · High

What it is

Acidity is the tart, fresh, mouth-watering sensation primarily felt on the sides of the tongue and back of the palate. One of the most diagnostically powerful structural elements — acidity level correlates directly with latitude and climate. The CMS uses a five-point scale.

The CMS Scale

Low

Flat, soft, with minimal tartness. Common in very warm-climate wines or wines with excessive MLF. Can indicate a wine past its peak where acidity has faded.

Medium Minus / Medium / Medium Plus

The normal range. Medium is the baseline for most commercial wines. Medium Plus is noticeable but balanced — common in cool-climate varieties like Sauvignon Blanc, Pinot Noir, and unoaked Chardonnay.

High

Pronounced, mouth-watering tartness. Classic in cool-climate whites and reds: Mosel Riesling, Chablis, Vinho Verde, Barbera d'Asti, young Nebbiolo.

🍷 Practical Tasting Tip

Calibrate acidity by how much your mouth waters after swallowing. A low-acid wine produces little salivation; a high-acid wine produces immediate, persistent salivation. Acidity assessment should happen before alcohol, as alcohol heat can reduce the perceived sharpness of acidity.

🔍 Deductive Value

High acidity = cool climate or a naturally high-acid variety (Riesling, Barbera, Nebbiolo, Sangiovese). Low acidity = warm climate or a warm vintage. Medium Plus acidity in a red with red fruit = strongly suggests cool-climate origin. Acidity combined with alcohol is your most powerful climate calibration tool.

Alcohol

Low · Medium Minus · Medium · Medium Plus · High

What it is

Alcohol level is felt as warmth or heat in the throat and chest after swallowing. It is the product of grape sugar content at harvest converted during fermentation. Alcohol correlates directly with climate and vintage conditions.

The CMS Scale

Low

Under approximately 11% ABV. Minimal warmth on the finish. Mosel Riesling Kabinett, Vinho Verde, some Champagne. Indicates cool climate, early harvest, or arrested fermentation.

Medium Minus / Medium / Medium Plus

Approximately 11-14% ABV. The range covering most commercial table wines. Medium (around 12.5-13%) is the baseline for European dry whites and reds.

High

Over approximately 14% ABV. Clear warmth in the throat and chest. Common in warm-climate reds (Châteauneuf-du-Pape, Barossa Shiraz, Napa Cabernet, Zinfandel) and fortified wines.

🍷 Practical Tasting Tip

Swallow the wine and count to three — the burn you feel in your throat and chest is the alcohol. Low alcohol fades almost immediately; high alcohol creates a lingering warmth. Be careful not to confuse spice (from black pepper, oak) with alcohol heat.

🔍 Deductive Value

High alcohol + ripe fruit + low acidity = warm climate (Southern Rhône, Barossa, Napa, Mendoza). Low alcohol + high acidity = cool climate (Mosel, Chablis, Loire, cool-vintage Burgundy). Alcohol level is most useful when combined with acidity to triangulate climate — they should move in opposite directions as climate warms.

Body

Light · Medium Minus · Medium · Medium Plus · Full

What it is

Body is the overall weight and viscosity of the wine on the palate — how heavy or light it feels. Influenced by alcohol level, residual sugar, extract, and tannin. The most useful analogy: skim milk (light body), whole milk (medium body), heavy cream (full body).

The CMS Scale

Light

Delicate, almost watery weight. Classic in Muscadet, Vinho Verde, Pinot Grigio (light style), Mosel Riesling, light Pinot Noir.

Medium Minus / Medium / Medium Plus

The normal range for most commercial wines. Medium is the default baseline; adjust with + and - based on perceived weight.

Full

Rich, heavy, coating weight on the palate. Classic in Châteauneuf-du-Pape, Barossa Shiraz, Napa Cabernet Sauvignon, oaked Chardonnay from warm climates.

🍷 Practical Tasting Tip

Body and alcohol are closely related but not identical — residual sugar and extract can add body without high alcohol. Assess body independently before locking in an alcohol call.

🔍 Deductive Value

Full body + high alcohol + ripe fruit = warm climate or warm vintage. Light body + high acidity = cool climate or thin-skinned variety. Full body in a white wine + oak = likely oaked Chardonnay, White Rioja, or full Viognier.

Tannin

Volume: Low · Medium Minus · Medium · Medium Plus · High | Texture: Silky · Soft · Gritty · Coarse · Rough · Stalky · Hard

What it is

Tannins are polyphenols from grape skins, seeds, and stems that create a drying, gripping sensation on the gums and palate. The CMS grid assesses two tannin dimensions: volume (how much) and texture (what kind). Both carry significant deductive value and are assessed separately in the 2024 CMS Americas format.

Tannin Volume

Low

Minimal drying sensation. Common in thin-skinned varieties (Pinot Noir, Grenache, Gamay) and in aged wines where tannins have polymerized and precipitated as sediment.

Medium Minus / Medium / Medium Plus

The normal range. Medium Plus is clearly present and slightly firm — common in Merlot, Sangiovese, and Syrah.

High

Pronounced drying grip. Classic in Cabernet Sauvignon, Nebbiolo, Tannat, and young Syrah.

Tannin Texture (CMS)

Silky / Soft

Fine, smooth, almost imperceptible tannin. Indicates a thin-skinned variety, ripe tannins from a warm vintage, or extended aging. Aged Burgundy, mature Merlot, Grenache.

Gritty / Coarse

A granular, rough-edged texture. Common in young Sangiovese, Nebbiolo, and some Malbec. The tannins feel like fine sandpaper on the gums.

Rough / Hard

Firm, drying, unresolved tannin. Common in very young, high-tannin wines or wines from a cold vintage where tannins haven't fully ripened. Young Barolo, young Bordeaux in cool years.

Stalky

A green, leafy quality to the tannin — often from stems included in fermentation or underripe seeds. Indicates whole-bunch fermentation or harvest at suboptimal ripeness.

🍷 Practical Tasting Tip

Assess tannin volume by running your tongue across the upper gums after swallowing — the degree of dryness is your tannin measure. For texture, note the quality of that grip: smooth and even (silky), or rough and granular (gritty)? Tannin texture is often more diagnostically useful than volume alone.

🔍 Deductive Value

High + gritty/coarse = young Nebbiolo (Barolo/Barbaresco), Sangiovese, or young Cabernet Sauvignon. High + silky = well-made warm-climate Cabernet Sauvignon or aged Barolo. Low + silky = Pinot Noir, Grenache, or aged wine. Stalky tannin = whole-bunch fermentation, possibly Burgundy or Northern Rhône.

Texture

Lean · Linear · Crisp · Soft · Creamy · Round · Waxy · Oily · Viscous

What it is

Texture describes the mouthfeel of the wine — how it feels physically as it moves across the palate. The CMS notes texture when apparent and lists nine descriptors. Texture is influenced by body, alcohol, residual sugar, malolactic fermentation, lees contact, and grape variety.

CMS Texture Descriptors

Lean / Linear

Taut, focused, with minimal weight or roundness. Classic in cool-climate whites: Chablis, Mosel Riesling, Muscadet.

Crisp

Fresh, clean, with a sharp, refreshing quality driven by acidity. Common in high-acid whites — Sauvignon Blanc, unoaked Chardonnay, Picpoul de Pinet.

Soft

Gentle, approachable, with rounded edges. Low tannin or MLF in reds; low acidity or off-dry character in whites.

Creamy / Round

Smooth, generous mouthfeel from MLF, lees contact, or full body. Classic in oaked Chardonnay, White Burgundy, full-bodied reds with ripe tannins.

Waxy / Oily

A coating, slick quality. Common in Roussanne, old-vine Chenin Blanc, some Viognier, and wines with very high glycerol from botrytis.

Viscous

Thick, syrupy texture. Typical of very sweet, high-RS wines or high-alcohol, high-extract reds.

🍷 Practical Tasting Tip

Texture is best assessed by swirling the wine around your mouth and noting how it feels against the palate, cheeks, and tongue. Lean/linear wines feel almost aqueous; creamy wines feel coating and generous.

🔍 Deductive Value

Lean/linear = cool climate, high acid, minimal intervention (Chablis, Mosel, Muscadet). Creamy = MLF present, likely Chardonnay or oaked white. Waxy = specific variety marker (Roussanne, aged Chenin Blanc, Viognier). Viscous = high RS or very high alcohol/extract.

Phenolic Bitterness

White Wines Only · Yes or No

What it is

Phenolic bitterness is a distinct bitter sensation on the palate — separate from tannin astringency — caused by phenolic compounds from grape skins, seeds, and stems. In the CMS grid it is assessed in white wines only, as a Yes or No observation. It is perceived as a bitter taste, not a drying or gripping sensation.

What It Indicates

Yes — Present

A distinct bitter finish or mid-palate bitterness. Classic in certain white varieties with naturally high phenolic content: Greco di Tufo, Vermentino, Assyrtiko, Grüner Veltliner, Pinot Gris. Also common in skin-contact whites.

No — Absent

Clean finish without bitter phenolic character. Most fruit-forward varieties and winemaking styles. Absence is neutral — does not indicate a specific grape or style.

🍷 Practical Tasting Tip

Distinguish phenolic bitterness from tannin: tannin creates a drying, gripping sensation on the gums — bitterness is a taste perceived on the back of the tongue and finish. In exam conditions, note both separately.

🔍 Deductive Value

Phenolic bitterness in a white = strong indicator of Italian or Greek varieties (Greco di Tufo, Vermentino, Assyrtiko), skin-contact wines, or varieties with naturally high phenolic content. Phenolic bitterness + high acidity + mineral = consider Assyrtiko (Santorini) or Grüner Veltliner.

Balance

Yes or No · What element(s) dominate?

What it is

Balance is the relationship between the wine's structural elements — fruit, acidity, tannin, alcohol, and sweetness. A balanced wine has no single element that dominates or detracts from the overall impression. The CMS records balance as Yes or No, and asks which element dominates if balance is not achieved.

Assessing Balance

Yes — Balanced

All elements are in harmony. No single structural component dominates unpleasantly. A key quality indicator — balanced wines generally have better aging potential.

No — Imbalanced

One or more elements dominate or are absent to a degree that disrupts harmony. Examples: too much acidity (sour, sharp), too much alcohol (hot, burning), too much tannin (astringent), insufficient fruit (thin, watery), excessive oak (wood dominates).

🍷 Practical Tasting Tip

Ask yourself: is there anything that jumps out unpleasantly or that seems missing? If nothing stands out as a problem and the wine feels harmonious, it's balanced. Balance is a prerequisite for high quality ratings.

🔍 Deductive Value

Balance is primarily a quality indicator. However, specific imbalances carry diagnostic information: high acid dominating + low fruit = wine past its peak, or very cool vintage. High alcohol dominating = warm climate or late harvest. Tannin dominating + youthful fruit = young wine with age potential.

Length of Finish

Short · Medium Minus · Medium · Medium Plus · Long

What it is

Finish (also called length or persistence) is how long the pleasant flavors of a wine linger on the palate after swallowing. Only the pleasant sensations count — a lingering bitterness or alcohol burn does not constitute a long finish. The CMS uses a five-point scale.

The CMS Scale

Short

Flavors disappear almost immediately after swallowing. Common in simple, everyday commercial wines. Associated with lower quality.

Medium Minus / Medium / Medium Plus

The normal range for most commercial wines. Medium is the baseline — flavors persist for a few seconds.

Long

Flavors persist clearly for 10-20+ seconds after swallowing. Associated with wines of concentration, complexity, and quality: Premier Cru, Grand Cru, Reserva/Gran Reserva level wines.

🍷 Practical Tasting Tip

Swallow and count silently until you can no longer detect the wine's flavors. Short = 1-3 seconds. Medium = 4-6 seconds. Long = 7+ seconds. Remember: only count pleasant flavor persistence, not bitterness or alcohol heat.

🔍 Deductive Value

Long finish supports a quality-focused wine. Combined with complexity and balance, a long finish helps justify a high quality assessment. Short finish in a wine with otherwise good structure suggests either a young wine not fully showing, or a wine from a lesser appellation.

Complexity

Simple · Medium Minus · Medium · Medium Plus · High

What it is

Complexity is the number of distinct layers of aromas and flavors in a wine, and how they evolve and interact over time in the glass and on the palate. A simple wine has one dominant note; a complex wine reveals multiple layers that shift and develop. The CMS uses a five-point scale.

The CMS Scale

Simple

One or two dominant notes, little development. Most everyday commercial wines. Not a fault — simple wines can be delicious — but correctly identified as simple.

Medium Minus / Medium / Medium Plus

Multiple notes detectable, with some development over time. The range for most good-quality wines.

High

Multiple layers that evolve significantly over time in the glass. Aromas and flavors shift and develop. Associated with premium wines and important vintages.

🍷 Practical Tasting Tip

Complexity develops over time in the glass — pour, then come back after 5-10 minutes. A wine that smells different and more interesting on the second visit is showing complexity. Also note whether the nose offers different information than the palate — each layer counts.

🔍 Deductive Value

High complexity supports a premium appellation or producer. Combined with a long finish and good balance, high complexity indicates a wine worth placing in a quality classification. Simple complexity does not exclude a wine from being good, but generally rules out Grand Cru or Reserva level designations.

🏁 Conclusions

The CMS Deductive Tasting Method concludes in two stages: an Initial Conclusion (climate, possible grapes, possible countries, age range) and a Final Conclusion (specific grape or blend, country, region and appellation, official quality level, style category, and vintage). You build from general to specific using the evidence gathered in sight, nose, and palate.

Climate

Cool · Moderate · Warm

What it is

Climate is your first deductive conclusion — the most important synthesis of your structural observations. The 2024 CMS Americas grid explicitly replaced Old World/New World terminology with climate assessment, making climate the primary geographic orientation tool. Climate is triangulated from fruit condition, acidity, alcohol, and body.

The CMS Scale

Cool

High acidity, lower alcohol (under ~12.5% ABV), lighter body, tart to ripe fruit condition. Classic cool-climate regions: Mosel, Chablis, Loire, Burgundy, Alto Adige, Rías Baixas, Champagne, Marlborough, Willamette Valley.

Moderate

Balanced acidity and alcohol, medium body, fresh to ripe fruit. The broadest category. Classic moderate regions: Bordeaux, Northern Rhône, most of central Italy, Rioja, Napa Valley in most years.

Warm

Lower acidity, higher alcohol (over ~14% ABV), full body, ripe to jammy fruit. Classic warm regions: Southern Rhône, Barossa Valley, McLaren Vale, Châteauneuf-du-Pape, Priorat, Mendoza.

🍷 Practical Tasting Tip

Climate is your single most powerful deductive tool because it immediately rules out entire regions. Acidity and alcohol should move in opposite directions as climate warms — high acid + low alcohol = cool; low acid + high alcohol = warm. Fruit condition is supporting evidence: tart/ripe = cool, baked/jammy = warm.

🔍 Deductive Value

Cool climate significantly narrows possible regions and varieties: thin-skinned grapes, high-acid styles, modest alcohol. Warm climate points toward thick-skinned varieties from lower-latitude regions. Moderate climate covers the widest range and requires the most supporting evidence from variety-specific markers to narrow the conclusion.

Age Range

1-3 years · 3-5 years · 5-10 years · 10 years+

What it is

The CMS Initial Conclusion includes an age range estimate in four brackets. This is an initial hypothesis built from all aging indicators observed on sight and nose — not a precise vintage call, which comes in the Final Conclusion.

The CMS Age Brackets

1-3 years

Youthful in every dimension. Purple or ruby color with minimal rim variation. Vibrant primary fruit dominant. Structure firm or fresh and unintegrated.

3-5 years

Beginning to show development. Color shifting toward garnet. Some rim variation. Primary fruit still dominant but secondary/tertiary notes beginning to emerge.

5-10 years

Developing to developed. Garnet with clear orange rim variation. Primary and tertiary aromas in balance. Structure integrated. The drinking window for many quality wines.

10 years+

Vinous/aged character. Brown secondary colors at rim. Tertiary aromas dominant — earth, leather, mushroom, dried fruit. Tannins fully softened.

🍷 Practical Tasting Tip

Build your age estimate from multiple indicators, not one. Cross-reference: color (rim variation, secondary hue), nose (fruit condition and tertiary development), and palate (tannin integration, acidity freshness). A wine showing all age indicators in alignment is more reliably aged than one showing contradictory signals.

🔍 Deductive Value

Age range is a key input to your Final Conclusion vintage call. Combine with regional norms for drinking windows — a 5-year-old Barolo may just be entering its window, while a 5-year-old Beaujolais is likely past peak.

Official Quality Level

Village · Premier Cru · Grand Cru · Reserva · Gran Reserva · Normale · Riserva · Classico · Gran Selezione · Kabinett · Spätlese · Auslese

What it is

Official quality levels are classification designations specific to wine regions that carry legal meaning. The CMS Final Conclusion asks you to identify the official quality level where appropriate — only when the wine's observable characteristics allow a confident assessment.

Key Quality Systems

Burgundy: Village / Premier Cru / Grand Cru

A three-tier vineyard hierarchy. Village wines come from appellation-level vineyards. Premier Cru from classified single vineyards. Grand Cru from the 33 highest-ranked individual plots. Observable indicators: complexity, concentration, length of finish, and character that transcends the appellation norm.

Rioja / Ribera del Duero: Joven · Crianza · Reserva · Gran Reserva

Age-based classification tied to minimum oak and bottle aging requirements. Reserva = minimum 3 years total aging (1 year in oak). Gran Reserva = minimum 5 years total aging (2 years in oak). Observable in tannin integration, tertiary development, and oak character relative to fruit.

Italy: Normale / Riserva / Classico / Gran Selezione

Italian quality designations vary by appellation. Riserva indicates extended aging beyond minimum requirement. Classico designates the historic heartland of a DOC zone. Gran Selezione (Chianti Classico) is a single-vineyard, estate-only designation requiring 30 months aging minimum.

Germany: Kabinett / Spätlese / Auslese

Prädikat levels based on must weight at harvest. Kabinett = lightest, lowest RS. Spätlese = late harvest, more concentration and RS. Auslese = select harvest of very ripe bunches, noticeably sweet.

🍷 Practical Tasting Tip

Only call a quality level when the evidence clearly supports it. Long finish + high complexity + balanced structure + appropriate aging = Premier Cru or Grand Cru territory in Burgundy, or Reserva in Spain. Don't overstate — if the wine is good but not exceptional, Village or Normale is the correct honest call.

🔍 Deductive Value

Quality level evidence includes: length of finish (long = higher quality), complexity (high = higher quality), balance (essential for premium quality), and aging indicators (Reserva/Gran Reserva in Spain require specific minimum aging detectable in tannin and oak integration).

🌹 Aroma & Flavor Quick Reference

Key diagnostic aromas and the grape varieties, regions, and winemaking decisions they most commonly point toward. These are patterns to recognize, not rules. Build your own aroma memory by tasting comparatively — the same grape from different climates side by side.

Signature Aromas → Grape & Region Associations

The diagnostic links every blind taster should know

Classic Associations

Cassis / Blackcurrant

The defining fruit of Cabernet Sauvignon worldwide. One of the strongest single-note diagnostics in blind tasting.

Lychee / Rose

The twin calling cards of Gewurztraminer. Both together = near-certain identification. Terpene-driven aromatics.

White Peach / Apricot / Violet

Viognier. Especially Condrieu. The floral-stone fruit combination is highly distinctive and variety-specific.

Petrol / Kerosene

Aged Riesling. TDN compound. Develops with bottle age, most pronounced in warmer vintages. Near-diagnostic for aged Riesling.

Green Bell Pepper / Capsicum

Pyrazines in underripe Cabernet Sauvignon, and more characteristically Cabernet Franc (Loire: Chinon, Bourgueil).

Flint / Gunsmoke / Wet Stone

Classic Sancerre and Pouilly-Fumé descriptor. Mineral terroir expression from silex and limestone soils of the Central Loire.

Violet / Blueberry / Black Olive

Syrah/Shiraz. Violet is especially characteristic of Northern Rhône Syrah. Black olive appears in warm Syrah expressions.

Black Pepper / Rotundone

Northern Rhône Syrah's most diagnostic compound. White pepper = Grüner Veltliner. Both are among the most reliable varietal compounds in deductive tasting.

Raspberry / Cherry / Forest Floor

Cool-climate Pinot Noir / Red Burgundy. The combination of red fruit and earthy tertiary notes is highly characteristic.

Sour Cherry / Leather / Roses / Tar

Nebbiolo (Barolo/Barbaresco). The sour cherry + rose + tar combination is among the most diagnostic aroma profiles in all of wine.

Elderflower / Gooseberry / Cut Grass

Sauvignon Blanc — especially Loire (Sancerre, Pouilly-Fumé) and cool-climate expressions (Marlborough, Casablanca).

Butter / Vanilla / Hazelnut

MLF and oak-aged Chardonnay. Burgundy, California, oaked white Rioja. All three together = very high diagnostic confidence for this profile.

Orange Blossom / Honey / Apricot

Botrytized wines. Sauternes, Beerenauslese, Tokaji Aszú. The honeyed floral-stone fruit combination is diagnostic of noble rot.

Dried Cherry / Leather / Tobacco

Tempranillo, especially aged Rioja Reserva/Gran Reserva. Combined with vanilla/coconut = traditional Rioja with American oak.

Bubblegum / Banana

Carbonic maceration. Highly diagnostic for Beaujolais Nouveau or natural wine made with whole-cluster, low-intervention style.

🍷 Study Tip

Build your aroma memory comparatively — taste wines side by side from the same grape in different climates, or the same region in different vintages. Taste a Sancerre next to a Pouilly-Fumé, a Gevrey-Chambertin next to a Volnay, a Côte-Rôtie next to a Barossa Shiraz. Relative recognition is more reliable under exam pressure than absolute recall.

Somm AI

Your Final Deduction

Reveal the Wine

Reflection

Tasting History

Tasting Guide

Vintage Chart