What is Cognac?

Cognac is brandy — distilled wine — produced in the Cognac region under appellation rules: primarily ugni blanc, double-distilled in Charentais pot stills, and aged in French oak. Age statements on the label refer to the youngest eau-de-vie in the blend: VS at least two years, VSOP at least four, XO at least ten (since 2018). Cocktail recipes that specify Cognac generally mean a VS or an inexpensive VSOP, not an XO sipping blend.

It is a fruit-forward, moderately tannic base for the Sidecar (cognac sour with orange liqueur and lemon), for brandy Old Fashioned-family drinks, and for stirred composites such as the Vieux Carré. Generic brandy can occupy the same templates with less floral grape character.

Dried fruit, grape flower, oak, spice; older cognac develops rancio (nutty, mushroom, oxidative richness). VS is fruitier and more fiery; VSOP and above are smoother and more oak-driven. Mixing VS should still taste of grape, not only of ethanol and caramel.

Cognac was a major export spirit long before it was a cocktail ingredient; 19th-century punches, slings, and sours used brandy as readily as whiskey. Phylloxera in French vineyards and the rise of cheaper grain whiskey in the United States reduced brandy’s place on the American bar.

The Sidecar — cognac, orange liqueur, lemon — is an early-20th-century sour (Paris or London, World War I era). The Vieux Carré (Hotel Monteleone, New Orleans, 1930s) splits cognac with rye. Those drinks assume grape brandy’s dried-fruit register, not bourbon’s corn vanilla.

Use VS or mixing-grade VSOP in Sidecars and other brandy sours, in punches, and in stirred drinks that name cognac. Substituting American whiskey yields a whiskey sour or Boulevardier-adjacent drink without grape or rancio. Armagnac is a legitimate, often more rustic alternative (typically single-distilled). XO in a shaker is chemically fine; lemon and liqueur mute the aging nuance the extra years paid for. Store upright, like other spirits.