The World of Cognac

Practically omnipresent in the vineyards of the Cognac region, this grape variety produces a lively white wine, which is the basis of the eaux-de-vie. The wine’s natural acidity helps to preserve it during the winter months, prior to distillation, while its low sugar content means it is low in alcohol but concentrated in aromas.

The Cellar Master decides to stop the age ing of an eau-de-vie when he judges that it has reached maturity. To do this, he transfers it into a glass or stoneware bottle (with a capacity of 20 to 50 litres) known as a “dame-jeanne” (demijohn). The eau-de-vie can be stored in this airtight container for several decades. It is thought that the origin of the name dates back to the 14th century and refers to Joanna I, Queen of Naples.

When eaux-de-vie are aged in oak barrels, a portion of their volume evaporates into the air. This natural – and poetic – phenomenon is known as “the angel’s share”. The alcohol vapours nourish a microscopic fungus called torula compniacensis, which forms the distinctive black stain covering the stones and walls of the Cognac region. In bygone days, torula was a very useful way to detect the presence of an undeclared cognac cellar. The angel’s share represents a challenge for cognac houses, since every year 2% of the region’s production evaporates!