The Grape Varieties of Champagne
In most cases, Champagne is an extremely complex blended wine — not only a blend of grape varieties, but also a blend of wines from vineyards throughout the Champagne region of France. The blend, called the cuvée, combines the strengths of each vineyard. Champagne is also typically a blend of wines from different vintages.
Champagne is made mainly from three grape varieties:
Pinot Noir (a red variety)
Pinot Meunier (a red variety related to Pinot Noir)
Chardonnay (a white variety)
A few minor grapes — such as Petit Meslier, Arbanne, and Pinot Blanc — still survive in some of the region’s vineyards and are still permitted, but they cannot be replanted and are of little consequence.
About 85 to 90 percent of Champagnes are a blend of about 2/3 red grapes and 1/3 Chardonnay. A few Champagnes (less than 5 percent) are 100 percent Chardonnay (they are called blanc de blancs); fewer yet are 100 percent red grapes (called blanc de noirs). Rosé Champagnes, a small category, are usually, but not always, made from a blend of white and red grapes.
The reason that most Champagnes are blends of Pinot Noir, Pinot Meunier, and Chardonnay is that each grape variety has strengths to contribute to the final blend:
Pinot Noir adds body, structure, aroma, and a complexity of flavors. This difficult variety likes the cool climate of the region, and it grows well in the chalky limestone soil.
Pinot Meunier contributes fruitiness, floral aromas, and a precocious character (readiness-to-drink sooner).
Chardonnay, a star performer in the Champagne region, gives freshness, delicacy, elegance, and finesse. For this reason, many producers make a blanc de blancs (Chardonnay) Champagne.
Pinot Meunier is especially valuable because it buds later in the spring than Pinot Noir and Chardonnay. It is therefore less prone to damaging frosts and can thrive in areas like the Marne River Valley, where Pinot Noir and Chardonnay would not be successful. It also ripens earlier in the fall than the other two varieties, thus often avoiding autumn rains. But Pinot Meunier has a disadvantage: Its wines tend to age more quickly than those of the other two varieties. Also, many producers think it is not quite so fine as Pinot Noir and Chardonnay, and therefore do not use it in their most prestigious Champagnes.

Wine Glossary
American Viticultural Area; AVA
In the United States, a term that defines the geographical boundaries of a specific wine zone or region. For example, Napa Valley is the name of the AVA within Napa County.

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AOC
An acronym for Appellation d’Origine Contrôlée (the shortened form is Appellation Contrôlée, or AC). AOC is a classification relating to the quality of a wine produced in the European Union (EU).

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AOQS
An acronym for Appellation d’Origine de Qualité Supérieure. AOQS is a classification relating to the quality of a wine produced in the European Union (EU); in this case, refers to a wine of superior quality.

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appellation
In the European Union, a registered place name listed on a wine label that indicates the origin of the wine. Sometimes called appellation of origin.

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aroma
A wine descriptor that refers to how a wine smells.

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balance
A standard that wine experts use to judge wine quality; the relationship of four components (acidity, sweetness, tannin, and alcohol) to each other.

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body
A wine descriptor that explains how heavy a wine feels in your mouth (often related to the alcohol content). Wines are often described as light-bodied, medium-bodied, or full-bodied.

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bouquet
A wine descriptor that refers to how a (typically well-aged) wine smells.

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complexity
A standard that wine experts use to judge wine quality; refers to a characteristic of a wine that has multiple flavors and aromas (usually a better quality wine).

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crisp
A wine descriptor that refers to a wine with refreshing (typically high) acidity.

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decanter
A glass container that can hold the contents of an entire bottle of wine; often used to aerate the wine (let it breathe before consuming).

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depth
A standard that wine experts use to judge wine quality; indicates a wine that gives the impression of having many layers (rather than being "flat" tasting).

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DO
An acronym for Denominação de Origen. DO is Portugal’s highest quality ranking for their wines.

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DOC
An acronym for Denominazione di Origine Controllata. DOC is a classification referring to a quality wine produced in Italy.

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DOCG
An acronym for Denominazione di Origine Controllata e Garantita. DOCG is a classification relating to a small group of elite (high-quality) wines produced in Italy.

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dry
A wine descriptor that refers to a wine that is not sweet. Wines can be classified as dry, off-dry (or semi-sweet), or sweet.

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fermentation
The process (during winemaking) in which yeasts convert the sugars in a grape juice to alcohol and carbon dioxide.

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finish
A wine descriptor that refers to the impression a wine leaves in your mouth after you taste and swallow it (the aftertaste). A standard used to judge wine quality.

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flavor intensity
A wine descriptor that refers to how strong or weak a wine's flavors are.

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fruity
A wine descriptor that refers to a wine that has aromas and flavors that suggest fruit.

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IGT
An acronym for Indicazione di Geografica Tipica. IGT is a table wine classification for Italian wines that list a geographic location on the wine label.

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length
A standard that wine experts use to judge wine quality; indicates a wine that you can taste on the full length of your tongue, rather than just the front of your tongue.

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oaky
A wine descriptor that refers to a wine that has flavors of oak, usually due to storage in oak barrels.

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palate
A term that wine tasters use synonymously for mouth.

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QbA
An acronym for Qualitätswein bestimmter Anbaugebiet. QbA is a classification referring to a quality wine from a special region in Germany.

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QmP
An acronym for Qualitätswein mit Prädikat. QmP is a classification referring to a quality wine with special attributes produced in Germany.

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QWPSR
An acronym for Quality Wine Produced in a Specific Region. QWPSR is a classification referring to quality European wines that have official place names.

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sediment
Refers to solids (tannin and other matter) that develop in some red wines over time.

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soft
A wine descriptor that refers to a wine with a smooth feel in the palate; usually refers to wines with low acidity.

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sommelier
An expert wine specialist who typically assembles a wine list and recommends wines that pair with specific foods.

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tannic
A wine descriptor that refers to a firm, red wine that leaves a dry feel in the palate.

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tannin
A substance in grape skins that contributes to how a red wine tastes.

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terroir
A French word (pronounced ter wahr) that refers to the unique combination of topsoil, climate, altitude, and other natural factors that a particular vineyard or wine region has.

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typicity
A standard that wine experts use to judge wine quality; refers to whether a particular wine is true to its type (for the specific grape variety).

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varietal
A wine that is named after the principal (or sole) grape variety used to produce the wine.

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vintage
The year in which the grapes for a specific wine were grown and harvested.

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VR
An acronym for Vinho Regional. VR indicates a table wine classification for Portuguese wines.