Module 1: Wine Basics

How Wine Is Made

Wine is, at its core, one of the simplest beverages ever created. Crush ripe grapes, let nature take over, and you get wine. The process that makes this happen is called fermentation, and understanding it will make everything else about wine easier to grasp.

Grapes contain two things that matter most: sugar and juice. When yeast (either naturally present on grape skins or added by a winemaker) comes into contact with that sugar, it begins converting it into alcohol and carbon dioxide. This is alcoholic fermentation. When the yeast runs out of sugar to consume, fermentation stops and you have wine.

The color of a wine is determined not by the juice, which is nearly colorless in almost all grape varieties, but by skin contact. Red wine gets its color from extended contact between the juice and the red or black grape skins during fermentation. White wine is typically made from white grapes with the skins removed before fermentation begins. This is also why a white wine can be made from a red grape: if the skins are removed immediately after crushing, the juice stays pale.

Every decision a winemaker makes, from when to pick the grapes to how long to leave the juice in contact with the skins to whether to age in oak barrels, happens either before, during, or after that fundamental fermentation process.

Why this matters on the floor: Guests often ask "is this wine sweet?" The answer starts with fermentation. If fermentation runs to completion, nearly all sugar is converted to alcohol and the wine is dry. If fermentation is stopped early, intentionally, some sugar remains and the wine tastes sweet. When a guest says a wine tastes sweet because it's fruity, you can confidently explain the difference between fruit-forward and actually sweet.

Pro Tip: A simple way to explain fermentation to a curious guest: "Yeast eats the natural sugar in the grapes and produces alcohol. The more sugar that's converted, the drier the wine. If the winemaker stops fermentation early, that remaining sugar is what makes it taste sweet."

How Wine Is Categorized

Wine is categorized along two main axes: carbonation (is there bubbles?) and production style (how was it made?). Color, whether red, white, rosé, or orange, is a third dimension that sits within those categories, not alongside them.

By Carbonation

Still Wine No carbonation. The vast majority of wine in the world falls here. Still wine can be red, white, rosé, or orange. It can be bone dry, off-dry, or sweet depending on how fermentation was managed.

Sparkling Wine Wine with bubbles, created by a second fermentation that traps carbon dioxide. The method used matters for the style of bubbles and flavor. The traditional method (used in Champagne, Cava, and many premium sparkling wines) involves the second fermentation taking place inside the individual bottle, creating fine, persistent bubbles and complex flavors. The tank method (used in Prosecco) involves the second fermentation in a pressurized tank before bottling, producing softer, fruitier bubbles. Sparkling wines range from bone dry (Brut Nature, 0–3g/L sugar) to noticeably sweet (Demi-Sec, 32–50g/L sugar).

By Production Style

Table Wine The standard category for still and sparkling wines made through normal fermentation without the addition of spirits. Alcohol typically ranges from 8% to 15% ABV.

Fortified Wine Wine that has had a distilled spirit, usually neutral grape spirit, added to it. This raises the alcohol level (typically 15–22% ABV) and, if added before fermentation is complete, halts fermentation and preserves residual sugar. The same method applied at different stages of fermentation produces radically different results: Port is fortified mid-fermentation, leaving it rich and sweet. Fino Sherry is fortified after fermentation, making it dry. Both are fortified wines, but they taste almost nothing alike. This distinction is essential: fortified does not automatically mean sweet.

Sweet / Dessert Wine Sweet wines can be fortified (Port, sweet Sherry, Madeira) or entirely unfortified. Unfortified sweet wines achieve their sweetness through concentration of sugar in the grapes, by late harvesting (allowing grapes to over-ripen on the vine), by the influence of Botrytis cinerea (a beneficial mold that shrivels grapes and concentrates sugars, responsible for Sauternes and Tokaji), or by freezing the grapes on the vine to extract only the most concentrated juice (Ice Wine). These wines can have exceptional sweetness with no added spirit whatsoever.

By Color

Color is a sub-classification within still and sparkling wine, not a standalone category:

• Red: made from dark-skinned grapes with extended skin contact during fermentation
• White: made from white/green grapes, or dark grapes with skins removed before fermentation
• Rosé: made from dark-skinned grapes with brief skin contact (typically a few hours to two days), giving color without the full tannin structure of red wine
• Orange: white grapes fermented with extended skin contact, producing amber-colored, often tannic white wines

Pro Tip: Guests sometimes ask if rosé is a blend of red and white wine. In almost every case, no. It's made from red grapes with limited skin contact. The notable exception is rosé Champagne, where blending is a legally permitted and common method. If a guest is surprised by this, it's a great conversation starter.

Reading a Wine Label

A wine label is a roadmap. Once you know how to read one, you can tell a guest almost everything they need to know before they take a sip. Labels vary significantly by country. Old World wines (France, Italy, Spain) tend to lead with the region, while New World wines (California, Australia, New Zealand) tend to lead with the grape variety. Neither approach is wrong; they simply reflect different traditions.

The Core Elements

Producer / Winery Who made the wine. This is typically the most prominent name on the front label. In France, this might be a château (Château Margaux); in Italy, an estate (Antinori); in California, a winery name (Ridge Vineyards).

Region or Appellation Where the grapes were grown. A legally defined wine-producing region is called an appellation. This matters because climate and soil directly shape how a wine tastes. "Napa Valley" signals a warm climate and likely a full-bodied red. "Marlborough" signals a cool, coastal region and likely a crisp, aromatic white. Appellations can be broad (California) or very specific (Rutherford, a sub-appellation within Napa Valley).

Grape Variety The type of grape used: Chardonnay, Cabernet Sauvignon, Pinot Noir. Not all labels list this. Many Old World wines omit the grape variety because the appellation implies it: the region has its own laws dictating which grapes may be grown and how the wine must be made.

Vintage The year the grapes were harvested. Weather changes year to year: a hot, dry year typically produces riper, richer wines, and a cool, wet year can produce leaner, more structured ones. A wine labeled NV (non-vintage) is a blend of multiple years, a deliberate choice for consistency, common in Champagne, Sherry, and many Port styles.

Alcohol by Volume (ABV) Required by law on every bottle. Ranges from roughly 7.5% (German Mosel Riesling) to 16%+ (Napa Zinfandel, Barossa Shiraz). Higher ABV generally means more body and warmth on the palate. Fortified wines typically list 15–22% ABV.

Cuvée / Fantasy Name Some producers give their wines a proprietary name that doesn't reference the grape variety or region. These are sometimes called cuvée names or fantasy names: "Opus One," "The Prisoner," "Insignia," "Sassicaia." These names carry their own identity and prestige but require the staff to know the wine behind the name, since the label alone won't tell you the grape or style.

Vineyard Designation When a wine is made entirely or primarily from grapes grown in one specific named vineyard, the producer may list the vineyard on the label: "To Kalon Vineyard," "Hyde Vineyard," "Bacigalupi." This signals a step up in specificity and often quality, as the producer is making a statement about the particular character of that site.

Pro Tip: When a guest picks up a bottle and asks "what's this like?", scan the label in this order: region (climate clue), grape variety (flavor profile clue), vintage (age and conditions clue), ABV (body and weight clue). In 10 seconds, you'll have an informed answer. If it's a fantasy-named wine, know your list: that's your homework before service.

What You're Tasting, The Five Components

Every wine, regardless of grape or region, can be assessed through five structural components. These aren't just academic; they're the vocabulary you'll use every shift to describe wines to guests, make recommendations, and sell with confidence.

Sweetness

The presence of residual sugar on the palate. Dry wines have little to none (under 4g/L). Off-dry wines have a slight sweetness. Wines of increasingly higher levels of residual sugar are described as medium-sweet, sweet, and lusciously sweet. The critical distinction: fruity is not the same as sweet. A Pinot Noir can smell intensely of cherries and strawberries and still be completely dry. Guests often describe fruit-forward wines as "sweet," and gently correcting this distinction is a mark of good service.

Acidity

The mouth-watering, bright quality in wine felt on the sides of your mouth, gums, and jaw; the same sensation as biting into a green apple or squeezing lemon juice on your tongue. High-acid wines feel crisp, refreshing, and food-friendly. Low-acid wines feel rounder, softer, and sometimes flabby. Acidity is naturally higher in grapes grown in cool climates (Germany, Burgundy, Champagne) and decreases as grapes ripen in warmer conditions.

Tannin

Found in red wine and some orange wines; absent in white and rosé. Tannin is the drying, slightly bitter, astringent sensation felt across your gums, teeth, and the front of your palate, most noticeable after drinking strongly-brewed black tea. It comes from grape skins, seeds, stems, and oak barrels. High-tannin varieties include Cabernet Sauvignon, Nebbiolo (Barolo/Barbaresco), and Syrah/Shiraz. Low-tannin reds include Pinot Noir and Gamay (Beaujolais). Tannin softens with age and is tamed by fatty foods, which is the reason big Cabernets pair so well with red meat.

Alcohol

Perceived as warmth in the throat, back of the nose, and chest. Higher-alcohol wines (14%+) feel fuller, richer, and more warming. Lower-alcohol wines (under 12%) feel lighter and more delicate. Alcohol is shaped primarily by how ripe the grapes were at harvest: riper grapes have more sugar, and more sugar means more fuel for fermentation.

Body

The overall weight and richness of the wine in your mouth, described as light, medium, or full. An easy reference point: light-bodied wine feels like skim milk; medium-bodied like whole milk; full-bodied like cream. Body is influenced primarily by alcohol level, but also by residual sugar, extraction, and winemaking. A full-bodied white (oaked Chardonnay) can feel richer than a light-bodied red (Pinot Noir).

Pro Tip: When a guest says "I don't know what I like," ask two questions: "Do you prefer lighter or richer wines?" and "Do you like dry, or a little sweetness?" Those two answers will point you to the right part of the wine list every time.