Sparkling Wine

Sparkling wine is wine with carbon dioxide dissolved in it, which makes it fizz when the bottle is opened. Champagne is one kind of sparkling wine, not a synonym for it: the name belongs to wine from the Champagne region of France. Prosecco, Cava, Crémant and Sekt are sparkling wines from Italy, Spain, France outside Champagne and Germany. So every Champagne is sparkling wine, and most sparkling wine is not Champagne.

How sparkling wine is made

Every sparkling wine starts as an ordinary base wine. The bubbles come from a second fermentation, where added sugar and yeast produce CO₂ in a sealed container, and the gas has nowhere to go but into the wine. The container is what separates the methods.

In the traditional method, used for Champagne, Cava and Crémant, the second fermentation happens in each bottle. The wine then rests on its dead yeast, called lees. Non-vintage Champagne must age at least 15 months, which gives the bready, toasty flavor. In the tank method, used for Prosecco, the second fermentation happens in a large sealed tank. Prosecco DOC requires at least 30 days, and the result is fresher and fruitier. Cheaper sparkling wines are sometimes simply injected with CO₂.

Sweetness: what brut means

Sweetness is set at the end by dosage, a splash of sugar solution added before the final cork. EU rules define the terms by grams of sugar per litre: brut nature under 3, extra brut under 6, brut under 12, extra dry 12 to 17, dry 17 to 32, demi-sec 32 to 50, and doux above 50. The labels run backwards for newcomers, because “extra dry” is sweeter than “brut.” Most bottles sold are brut, and a 150ml glass of brut has under 2g of sugar.

Calories and sugar

A glass of sparkling wine is lighter than most still wine in ABV, around 11 to 12.5%, so calories sit mostly in the alcohol. Sweetness moves the number: a demi-sec at 32 to 50 g/L carries several times the sugar of a brut. Compare Champagne vs Prosecco, or see the healthiest sparkling wine.

Why bubbles feel stronger

The carbonation claim in this category’s profile has some research behind it, but it is modest. A small 2003 study found people drinking bubbly Champagne had higher blood alcohol in the first 20 minutes than those drinking the same Champagne flat, and a later study using vodka with sparkling water found absorption about 50% faster on average. Individual results varied widely and the difference faded within roughly 35 minutes. Sulfites, which are common in sparkling wine, and any dosage sugar add to the next-day effect.