Why the world's most prestigious brandy is slowly vanishing into thin air

Food & Drink · Published 3 October 2026 Swipe more like this →

In short: Every year, millions of liters of cognac evaporate from oak barrels, a phenomenon locals poetically call the angels' share. This constant loss is just one step in a strictly regulated process that transforms thin, acidic wine into a complex spirit defined by geography, patience, and the art of blending.

Cognac is a strictly protected brandy produced in the Charente and Charente-Maritime departments of France. Its creation begins with a thin, acidic white wine, typically made from Ugni blanc grapes, which is twice distilled in copper pot stills. The resulting spirit, known as eau de vie, must then be aged for at least two years in French oak barrels. During this maturation, the spirit interacts with the wood and air, losing both alcohol and water to evaporation—the so-called angels' share. Over decades, this process reduces the alcohol content, with some spirits reaching 40% after fifty years in the barrel.

The final character of cognac is determined by the master taster, or maître de chai, who blends different eaux de vie to achieve a consistent house style. Because the age of a blend is defined by its youngest component, producers use specific grades to signal quality. These range from V.S., which requires at least two years of aging, to X.O., which was updated in 2018 to require a minimum of ten years. While large commercial houses dominate the market, hundreds of smaller vineyards also produce their own unique, non-blended or single-vineyard spirits.

Geography is central to the identity of cognac, with the region divided into six distinct crus. Areas like Grande Champagne and Petite Champagne are prized for their clay-limestone soils, while others like the Borderies or the various Bois regions offer different environmental influences. This complex system is overseen by the Bureau National Interprofessionnel du Cognac, which enforces strict production methods. The resulting spirit is so culturally significant that international agreements, such as the 2017 deal with Armenia, ensure the name remains exclusive to this specific French region, with protected status phasing out unauthorized use globally by 2043.

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