Cognac

Cognac (/ˈkɒn.jæk/ KON-yak, also US: /ˈkoʊn-, ˈkɔːn-/ ^ⓘ KOHN-, KAWN-, French: [kɔɲak] ^ⓘ) is a variety of brandy named after the commune of Cognac, France. It is produced in the surrounding departments of Charente and Charente-Maritime, in an officially designated wine-growing region. This region is divided into six districts with different cognacs produced in each.

Cognac production falls under French appellation d'origine contrôlée (AOC) designation, with production methods and naming required to meet certain legal requirements. Among the specified grapes, Ugni blanc, known locally as Saint-Émilion, is most widely used. The brandy must be twice distilled in copper pot stills and aged at least two years in French oak barrels from Limousin or Tronçais, Allier or Nevers – the majority coming from the first two. Cognac matures in the same way as whiskies and wines barrel-age, and most cognacs spend considerably longer "on the wood" than the minimum legal requirement.

Cognac is often drunk in glasses such as the snifter, which has a large tapered bowl and short stem. Such glasses allow the drinker to enjoy the aroma of the drink by placing their hand underneath the bowl and warming the cognac inside, causing it to produce more fumes.

Cognac is a type of brandy, and after the distillation and during the aging process, is also called eau de vie. It is produced by twice distilling wine made from grapes grown in any of the designated growing regions.

The white wine used in making cognac is very dry, acidic, and thin. Though it has been characterised as "virtually undrinkable", it is excellent for distillation and aging. It may be made only from a strict list of grape varieties. For it to be considered a true cru cognac, the white wine must be made from at least 90% Ugni blanc (known in Italy as Trebbiano), Folle blanche and Colombard, while up to 10% of the grapes used can be Folignan, Jurançon blanc, Meslier St-François (also called Blanc Ramé), Sélect, Montils, or Sémillon. Cognacs that are not to carry the name of a cru are freer in the allowed grape varieties, needing at least 90% Colombard, Folle blanche, Jurançon blanc, Meslier Saint-François, Montils, Sémillon, or Ugni blanc, and up to 10% Folignan or Sélect.

After the grapes are pressed, the juice is left to ferment for 2–3 weeks, with the region's native wild yeast converting the fruit sugars into alcohol; neither sugar nor sulphur may be added. At this point, the resulting wine is about 7 to 8% alcohol.

Distillation takes place in traditionally shaped Charentais copper alembic stills, the design and dimensions of which are also legally controlled. Two distillations must be carried out; the resulting eau de vie is a colourless spirit of about 70% alcohol.

Once distillation is complete, it must be aged in Limousin oak casks for at least two years before it can be sold to the public. It is typically put into casks at an alcohol by volume strength around 70%. As the cognac interacts with the oak barrel and the air, it evaporates at the rate of about 3% each year, slowly losing both alcohol and water (the former more rapidly, as it is more volatile). This phenomenon is called locally la part des anges, or "the angels' share". When more than fifty years pass in the oak barrel, the cognac's alcohol content decreases to 40% in volume. The cognac is then transferred to "large glass bottles called bonbonnes", then stored for future "blending." Since oak barrels stop contributing to flavor after four or five decades, longer aging periods may not be beneficial.