Module 2: Major Grape Varieties

How Grape Variety Shapes a Wine

Of all the factors that influence how a wine tastes, region, climate, winemaker, and vintage, grape variety is the starting point. Each grape has its own DNA: a unique set of chemical compounds that express themselves as specific aromas, flavors, and structural characteristics. These are called impact compounds, and they are consistent across the variety regardless of where it's grown.

Cabernet Sauvignon will always have some degree of dark fruit and firm tannin. Sauvignon Blanc will always carry some herbaceous, grassy character. Riesling will always have pronounced acidity. These aren't accidents; they're built into the grape's chemistry.

What changes is how those inherent characteristics are expressed based on where the grape is grown. A cool climate slows ripening, preserving acidity and producing more restrained, savory flavors. A warm climate accelerates ripening, producing riper fruit, lower acidity, and higher alcohol. The grape variety is the constant; climate and terroir are the variables.

Understanding both sides of that equation, what the grape always brings and how climate modifies it, is the foundation for reading a wine list, describing a wine, and making the right recommendation.

The Six Essential Red Grapes

Cabernet Sauvignon

The world's most recognized red grape. Cabernet Sauvignon is thick-skinned, late-ripening, and naturally high in tannin, qualities that give it structure, age-worthiness, and a powerful presence in the glass. It thrives in warmer climates where it has time to fully ripen.

Flavor Profile: Dark fruits (blackcurrant, blackberry, black cherry), cedar, tobacco, graphite, green bell pepper (in cooler conditions or less ripe vintages). With oak aging: vanilla, cigar box, toast.

Structure: Full body, high tannin, medium-high acidity, high alcohol (13.5–15% ABV).

Key Regions: Napa Valley (California), Bordeaux Left Bank (France), Coonawarra (Australia), Maipo Valley (Chile), Tuscany (Italy, often blended).

How to describe it to a guest: "Full-bodied and bold with dark fruit, firm tannins, and a long finish. It's a classic pairing with red meat; the tannins cut right through the fat."

Merlot

Cabernet Sauvignon's softer sibling. Merlot is thinner-skinned and earlier-ripening than Cabernet, producing wines with less tannin, more roundness, and an accessible plushness that makes it approachable without requiring age. It is the dominant grape of Bordeaux's Right Bank, where it produces some of the world's most expensive wines (Pétrus, Le Pin).

Flavor Profile: Plum, red cherry, chocolate, mocha, bay leaf, dried herbs. Riper styles from warm climates lean toward blueberry and fruitcake.

Structure: Medium-full body, medium tannin, medium acidity, medium-high alcohol (13–14.5% ABV).

Key Regions: Bordeaux Right Bank, Pomerol and Saint-Émilion (France), Washington State, California, Tuscany (Italy, in blends).

How to describe it to a guest: "Softer and rounder than Cabernet, with plum and chocolate notes and a velvety texture. It's very food-friendly and accessible even without being aged."

Pinot Noir

The most terroir-expressive red grape in the world. Pinot Noir is thin-skinned, early-ripening, and notoriously difficult to grow, but when it succeeds, it produces wines of extraordinary complexity and transparency. Because the skins are thin, tannins are naturally low and the wines are lighter in color. Pinot Noir is the grape of Burgundy, where the finest examples command prices rivaling Bordeaux's best.

Flavor Profile: Red fruits (red cherry, raspberry, strawberry) in cooler climates; darker fruit (black cherry, plum) in warmer ones. With age: forest floor, dried rose, mushroom, game, and a quality known as "barnyard" in the finest Burgundies. Earthy, silky, hauntingly complex at its best.

Structure: Light-medium body, low tannin, high acidity, moderate alcohol (12–13.5% ABV).

Key Regions: Burgundy, Côte de Nuits and Côte de Beaune (France), Willamette Valley (Oregon), Sonoma Coast and Santa Barbara (California), Central Otago (New Zealand), Alsace (France, for rosé and sparkling).

How to describe it to a guest: "Elegant and silky, lighter in body than Cabernet but incredibly complex. Red cherry, a bit earthy, with a long, haunting finish. It's one of the best wines for salmon or duck."

Syrah / Shiraz

Same grape, two personalities. Syrah is the name used in France and most of Europe; Shiraz is used in Australia and South Africa. The grape itself is the same, but the stylistic differences between a Northern Rhône Syrah and a Barossa Shiraz are dramatic enough that guests often don't realize they're drinking the same variety.

Cool Climate (Syrah, Northern Rhône, France): Savory, peppery, violet, olive, smoked meat, dark berry. Lean, structured, elegant. Wines like Hermitage and Côte-Rôtie are benchmarks.

Warm Climate (Shiraz, Barossa Valley, Australia): Ripe blackberry, dark chocolate, mocha, jam, eucalyptus. Full-bodied, plush, and high in alcohol (14.5–16% ABV).

Structure: Full body, medium-high tannin, medium acidity. High alcohol in warm climates.

Key Regions: Northern Rhône, Hermitage, Crozes-Hermitage, Côte-Rôtie (France); Barossa Valley (Australia); Washington State; South Africa.

How to describe it to a guest: "Depends entirely on where it's from. French Syrah is peppery and savory; almost meaty. Australian Shiraz is rich and jammy with dark chocolate notes. Two very different experiences from the same grape."

Zinfandel

California's signature red grape. Though genetically identical to the Italian Primitivo and the Croatian Tribidrag, Zinfandel found its spiritual home in California, where it produces a uniquely rich, high-alcohol, fruit-forward style. The grape ripens unevenly on the vine, and a single cluster can have both raisined and underripe berries at harvest, which contributes to its characteristically jammy, slightly spicy complexity.

Flavor Profile: Blackberry jam, raspberry, black pepper, spice, tobacco, dried fruit. Higher-alcohol expressions can show a port-like richness.

Structure: Medium-full body, medium tannin, medium acidity, high alcohol (14–16% ABV). Note: Zinfandel's high alcohol makes it one to mention to guests watching their intake.

Key Regions: Dry Creek Valley, Paso Robles, Lodi, Sonoma (California). Also produced in Puglia, Italy as Primitivo.

How to describe it to a guest: "Big, bold, and jammy with ripe blackberry and a peppery spice kick. High in alcohol; this is a wine to savor slowly. Great with barbecue and rich, smoky dishes."

Sangiovese

The backbone of Italian wine. Sangiovese is Italy's most widely planted red grape and the foundation of some of its greatest wines: Chianti Classico, Brunello di Montalcino, Morellino di Scansano, Vino Nobile di Montepulciano. It is a naturally high-acid, high-tannin grape that demands good food to show its best.

Flavor Profile: Red cherry, dried cherry, tomato leaf, dried herbs, leather, espresso. With age in oak: tobacco, dried fig, earthy complexity.

Structure: Medium-full body, high tannin, high acidity, medium alcohol (12.5–14% ABV).

Key Regions: Tuscany (Italy), Chianti Classico, Brunello di Montalcino, Montepulciano. Minor plantings in California and Argentina.

How to describe it to a guest: "Classic Italian, high acidity and firm tannins that make it one of the most food-friendly reds on any list. Red cherry, dried herbs, a hint of espresso. It was practically designed to go with pasta, pizza, and anything with tomato."

Nebbiolo

The king of Piedmont. Nebbiolo is one of Italy's most ancient and noble grapes, responsible for Barolo and Barbaresco, two of the most age-worthy and sought-after wines in the world. It is notoriously difficult to grow, highly sensitive to site and vintage, and deceiving in the glass: its color is deceptively pale and translucent for a wine of such immense structure. Don't let the light ruby fool you. Nebbiolo is ferociously tannic and acidic in youth, requiring years, sometimes decades, to fully open.

Flavor Profile: Red and black cherry, dried rose, violet, tar, leather, licorice, tobacco, truffle, and dried herbs. With significant age: an extraordinarily complex interplay of dried fruit, forest floor, and savory earthiness that few grapes can match.

Structure: Medium body (deceptively light in color and weight), very high tannin, very high acidity, medium-high alcohol (13.5–15% ABV). One of the highest-tannin, highest-acid combinations of any red grape.

Key Regions: Piedmont (Italy), Barolo and Barbaresco are the benchmarks. Also Langhe, Roero, Gattinara, and Ghemme. Rare plantings in California, Australia, and Argentina.

How to describe it to a guest: "Don't judge it by the color. Nebbiolo is one of the most powerful and complex reds in the world. Tar, dried rose, and cherry with extraordinary tannin and acidity. Barolo and Barbaresco need time in the bottle; if you're drinking a young one, decant it well in advance. Great with rich braised meats and aged cheeses."

Cabernet Franc

Cabernet Sauvignon's parent and its more elegant counterpart. Cabernet Franc is one of the parent grapes of Cabernet Sauvignon (a natural cross with Sauvignon Blanc). It is thinner-skinned, earlier-ripening, and more herbal in character. While it plays a blending role in Bordeaux and Napa Valley, it is the dominant variety in the Loire Valley, where it shines as a solo grape in Chinon, Bourgueil, and Saumur-Champigny, producing lighter, more aromatic, and more food-friendly reds than its offspring.

Flavor Profile: Raspberry, red currant, black cherry, graphite, pencil shavings, dried violet, green bell pepper (especially in cooler vintages or less ripe conditions), dried herbs. More aromatic and lighter than Cabernet Sauvignon, with a distinctive herbal lift that sets it apart.

Structure: Medium body, medium tannin, high acidity, medium alcohol (12–13.5% ABV). Cooler-climate expressions from the Loire are notably lighter and more delicate.

Key Regions: Loire Valley, Chinon, Bourgueil, Saumur-Champigny (France), where it is the primary variety; Bordeaux (France) as a key blending component in Right Bank wines; St-Émilion (France), where it can be dominant alongside Merlot; Friuli (Italy); Napa Valley and Long Island (USA).

How to describe it to a guest: "Think of it as a more refined, aromatic Cabernet Sauvignon. Lighter in body, with raspberry and graphite notes and a herbal edge. Loire Valley Cab Franc is one of the most underrated, food-friendly reds on any list, especially with Loire Valley classics like rillettes, mushroom dishes, and roasted chicken."

Tempranillo

The soul of Spanish wine. Tempranillo is Spain's most celebrated red grape and the backbone of its two greatest red wine regions, Rioja and Ribera del Duero. It goes by several names depending on the region: Tinto Fino or Tinta del País in Ribera del Duero, Cencibel in La Mancha, and Tinta Roriz or Aragonez in Portugal. Tempranillo is naturally moderate in acidity and tannin, making it approachable young, but its greatest expressions are shaped by significant oak aging, a defining tradition in Spanish winemaking.

Flavor Profile: Red cherry, plum, dried fig, leather, tobacco, vanilla, and dill (particularly from American oak aging, which is traditional in Rioja). Older Reserva and Gran Reserva wines develop complex notes of cedar, dried fruit, and earthy, dusty tannins.

Structure: Medium-full body, medium-high tannin, medium acidity, medium-high alcohol (13–14.5% ABV).

Rioja Oak Classifications (important for wine list knowledge):

• Crianza: minimum 2 years aging, including 1 year in oak
• Reserva: minimum 3 years aging, including 1 year in oak
• Gran Reserva: minimum 5 years aging, including 2 years in oak. Only produced in exceptional vintages.

Key Regions: Rioja (Spain), the most famous; Ribera del Duero (Spain), often considered Spain's most prestigious Tempranillo; Toro (Spain); Douro Valley and Alentejo (Portugal, as Tinta Roriz/Aragonez).

How to describe it to a guest: "Spain's answer to Cabernet, but with more spice, leather, and vanilla from the oak aging. Rioja is the benchmark: Crianza is approachable and food-friendly, Reserva adds more complexity, and Gran Reserva is for special occasions. Pairs beautifully with lamb, cured meats, and aged cheeses."

The Six Essential White Grapes

Chardonnay

The world's most versatile white grape. Chardonnay is neutral in its natural state, meaning it doesn't have powerful aromatic compounds of its own, which makes it the ultimate canvas for winemaker expression and terroir. It can produce the lean, mineral Chablis of northern Burgundy, the rich, oaky Napa Valley Chardonnay, and the finest Champagne, all from the same grape.

Flavor Profile: Varies enormously by climate and winemaking. Cool climate / no oak: green apple, lemon, chalk, saline. Warmer climate / oak: pear, peach, mango, vanilla, butter, toast, hazelnut.

Structure: Light-full body (depending on style), low-medium tannin, low-medium acidity, medium-high alcohol (12.5–14.5% ABV). Malolactic fermentation (a secondary process that converts sharp malic acid to softer lactic acid) is common, giving many Chardonnays their characteristic creamy texture.

Key Regions: Burgundy, Chablis, Côte de Beaune (France); Champagne (France, for sparkling); Napa Valley, Sonoma (California); Willamette Valley (Oregon); Margaret River (Australia).

How to describe it to a guest: "Depends on the style. Unoaked Chardonnay is crisp and mineral; think green apple and lemon. Oaked Chardonnay is rich and creamy; think butter, vanilla, and tropical fruit. Always worth asking which direction the guest leans."

Sauvignon Blanc

Aromatic, assertive, and unmistakable. Sauvignon Blanc contains high levels of pyrazines and thiols, chemical compounds that produce its characteristic herbaceous, grassy, and citrus-forward profile. It's rarely oaked, rarely aged long, and almost always enjoyed young. The one major exception is white Bordeaux and Pessac-Léognan, where it's blended with Sémillon and aged in oak.

Flavor Profile: Grapefruit, lime, green apple, gooseberry, cut grass, jalapeño, passion fruit (particularly in New Zealand), and a distinctive "cat pee" note at its most pungent (considered a marker of authenticity, not a flaw). Loire Valley styles lean floral and mineral; Marlborough styles lean tropical and intensely aromatic.

Structure: Light-medium body, no tannin, high acidity, medium alcohol (12–13.5% ABV).

Key Regions: Loire Valley, Sancerre, Pouilly-Fumé (France); Marlborough (New Zealand); Bordeaux (France, blended); Napa Valley, Sonoma (California).

How to describe it to a guest: "Crisp, refreshing, and very aromatic, citrus, gooseberry, sometimes a grassy note. Bone dry with bright acidity. One of the best food wines on the list, especially with seafood, salads, and goat cheese."

Riesling

The most misunderstood grape in the world. Riesling's reputation suffers from widespread confusion, many guests assume it's sweet because they've only encountered off-dry German Rieslings or cheap blends. In reality, Riesling produces a full spectrum from bone dry to lusciously sweet, and at every level of sweetness it maintains a piercing acidity that keeps it fresh and balanced. Dry Riesling is one of the most food-versatile whites in the world.

Flavor Profile: Lime, green apple, apricot, white peach, honey (in sweeter styles), and a distinctive petrol note (a complex aromatic compound called TDN) that develops with age and is considered a hallmark of great aged Riesling, not a flaw.

Structure: Light-medium body, no tannin, very high acidity, low-medium alcohol (7.5–13% ABV). The low alcohol in German Rieslings is preserved by stopping fermentation early, retaining sugar, which is why sweetness and low alcohol often appear together in German styles.

Key Regions: Mosel, Rhine, Rheingau, Pfalz (Germany); Alsace (France, typically dry); Clare Valley, Eden Valley (Australia, dry); Finger Lakes (New York State).

How to describe it to a guest: "Don't assume it's sweet, ask first. Dry Riesling is one of the crispest, most refreshing whites on the list, with lime and stone fruit and incredible acidity. If they want something off-dry, German Riesling is approachable and lower in alcohol. Either way it's extremely food-friendly."

Pinot Grigio / Pinot Gris

Same grape, two very different wines. Pinot Grigio (Italian) and Pinot Gris (French/Alsatian) are the same grape, a mutation of Pinot Noir with grayish-pink skin, but they represent two distinct stylistic traditions with almost nothing in common.

Pinot Grigio (Italian style): Light, crisp, dry, neutral. Pale lemon color, delicate pear and white peach flavors, refreshing acidity. Designed to be easy-drinking and food-neutral. The most commonly ordered white wine in casual dining.

Pinot Gris (Alsatian style): Rich, full-bodied, aromatic, sometimes off-dry. Deep gold color, ripe pear, quince, ginger, spice. A completely different experience, closer to a rich Chardonnay in weight.

Structure (Italian style): Light body, no tannin, medium-high acidity, low-medium alcohol (11–12.5% ABV).

Structure (Alsatian style): Full body, slight phenolic bitterness on the finish, low acidity, high alcohol (13.5–15% ABV).

Key Regions: Veneto, Friuli, Alto Adige (Italy); Alsace (France); Willamette Valley (Oregon); New Zealand.

How to describe it to a guest: "Ask which style they prefer. Italian Pinot Grigio is light, crisp, and easy, great as an aperitif. Alsatian Pinot Gris is rich and spiced, pairs beautifully with foie gras, pork, or anything with a bit of sweetness."

Albariño

The rising star of Spanish white wine. Albariño (called Alvarinho in northern Portugal, where it's the base of Vinho Verde) is one of the most food-friendly and guest-pleasing whites on any list. It has become increasingly popular in the US market over the past decade, and its combination of bright acidity, stone fruit, and saline minerality makes it one of the easiest recommendations to make.

Flavor Profile: White peach, apricot, lemon zest, grapefruit, saline/ocean spray, crushed stone. Light floral notes. Almost always unoaked.

Structure: Light-medium body, notable phenolic bitterness on the finish (from thick skins), high acidity, low-medium alcohol (11.5–13% ABV).

Key Regions: Rías Baixas, Galicia (Spain); Vinho Verde (Portugal).

How to describe it to a guest: "Crisp and aromatic, stone fruit, citrus, and a kind of sea-spray freshness. Very easy to drink and one of the best pairings with seafood and shellfish on the table."

Gewürztraminer

The most aromatic white grape in the world. Gewürztraminer is immediately recognizable, and even guests who don't know wine can pick it out of a lineup by its explosive lychee and rose petal aromas. "Gewürz" means spice in German, and the grape delivers exactly that. It is typically low in acidity, which gives it a lush, almost oily texture. In Alsace it is often made dry; in Germany it tends toward off-dry or sweet.

Flavor Profile: Lychee, rose petal, ginger, passion fruit, Turkish delight, cinnamon, orange blossom. Often described as perfumed or exotic.

Structure: Full body, noticeable phenolic bitterness, low acidity, high alcohol (13.5–14.5% ABV). Its low acidity can make it feel slightly heavy without food.

Key Regions: Alsace (France), the benchmark; Alto Adige (Italy); Pfalz, Baden (Germany); Marlborough (New Zealand); Monterey (California).

How to describe it to a guest: "Very aromatic, lychee, rose petals, and spice. It's a showstopper for guests who love fragrant whites. Surprisingly food-versatile too; one of the few wines that pairs well with spicy Asian cuisine because its slight sweetness balances the heat."

Viognier

The great aromatic white of the Northern Rhône. Viognier is the sole grape permitted in Condrieu and Château-Grillet, two of France's most prized and expensive white wines. It shares Gewürztraminer's intensity and low acidity but expresses itself through stone fruit and floral notes rather than spice. A small percentage of Viognier is sometimes co-fermented with Syrah in Côte-Rôtie, where it adds aromatic lift and helps stabilize color, one of wine's more unusual blending traditions. Viognier is a grape that can easily tip into heavy and flabby if yields are too high or alcohol gets out of hand; at its best, it is lush, perfumed, and hauntingly beautiful.

Flavor Profile: White peach, apricot, mango, orange blossom, honeysuckle, violet, cream, ginger. Rich and heady, with a texture that borders on viscous at full ripeness.

Structure: Full body, noticeable phenolic bitterness, low acidity, high alcohol (13.5–15% ABV). The low acidity is important to communicate to guests: without food, a full-bodied Viognier can feel heavy. With food, particularly rich dishes, it sings.

Key Regions: Northern Rhône, Condrieu and Château-Grillet (France), the benchmarks; Languedoc-Roussillon (France, for more affordable expressions); Eden Valley and Central Victoria (Australia); Virginia and California (USA).

How to describe it to a guest: "Think peach, apricot, and orange blossom, lush and aromatic with a creamy texture. It's a bigger, richer white, so it pairs best with equally rich dishes: lobster, scallops, foie gras, or spiced chicken. One of the most distinctive whites on the list."

Chenin Blanc

The most versatile white grape in the world. Chenin Blanc's range is extraordinary, producing bone-dry still wines, off-dry quaffing whites, some of the world's greatest dessert wines, and excellent sparkling wine, all from the same grape. Its secret weapon is its naturally piercing acidity, which provides structure and freshness at every sweetness level and allows it to age for decades. It is the defining white grape of the Loire Valley in France, where appellations like Vouvray, Savennières, Quarts de Chaume, and Bonnezeaux showcase its full range. It is also the most widely planted white grape in South Africa, where it is known as Steen and produces both everyday drinking wines and serious single-vineyard examples.

Flavor Profile: Quince, apple, pear, lemon curd, honey, beeswax, chamomile, ginger, and a distinctive wet wool or lanolin note that is considered a hallmark of the variety. Dry versions are taut and mineral; sweet versions are concentrated, honeyed, and complex.

Structure: Light-full body (depending on style and sweetness), no tannin, very high acidity, variable alcohol (10.5–14% ABV depending on style). The acidity is the constant: even in the sweetest expressions of Quarts de Chaume or Bonnezeaux, the wine never feels cloying because the acidity provides balance.

Key Regions: Loire Valley, Vouvray (dry, off-dry, sweet, and sparkling), Savennières (dry, powerful), Anjou, Saumur, Quarts de Chaume, Bonnezeaux (sweet) (France); South Africa (as Steen), both everyday and premium single-vineyard expressions; California and Argentina (more recent but growing).

How to describe it to a guest: "Chenin Blanc can be almost anything, crisp and dry, gently off-dry, or lusciously sweet. The key is the acidity, which keeps it fresh at every level. Dry Vouvray is one of the most underrated whites on any list, honeyed aromas but completely dry on the palate. A brilliant food wine, especially with pork, goat cheese, and anything with a touch of sweetness."

Trebbiano

Italy's workhorse white, and occasionally something much more. Trebbiano is Italy's most widely planted white grape and one of the most planted white grapes in the world. It is also grown extensively in France under the name Ugni Blanc, where it is used almost exclusively as the base wine for Cognac and Armagnac distillation: its naturally high acidity and neutral flavor profile make it ideal for the still. In Italy, Trebbiano appears across a wide range of DOC and DOCG wines as a blending component, often providing acidity and freshness but rarely the primary flavor. At its most basic, it produces light, clean, neutral whites for everyday drinking. At its best, particularly in Trebbiano d'Abruzzo from producers like Edoardo Valentini, it can produce wines of remarkable complexity and longevity that challenge preconceptions about the variety entirely.

Flavor Profile: Lemon, green apple, white blossom, almond, light herbs. Clean and neutral in most expressions. Higher-quality and aged examples develop more texture, nutty complexity, and a distinctive mineral quality.

Structure: Light body, no tannin, high acidity, low-medium alcohol (11–13% ABV).

Key Regions: Throughout central Italy, Orvieto, Soave (blended with Garganega), Frascati, Lugana (as Turbiana, a higher-quality biotype), Trebbiano d'Abruzzo (Abruzzo); France as Ugni Blanc (Cognac and Armagnac).

How to describe it to a guest: "Light, crisp, and clean. Trebbiano is the easy-drinking Italian white. It's not trying to be complex; it's trying to be refreshing and food-friendly. Great as an aperitif or with lighter dishes. If you see Trebbiano d'Abruzzo from a serious producer, it's worth exploring; it can be surprisingly age-worthy and textural."