🥃 Double distillation

Double distillation is a method in which wash or wine is distilled twice in batch pot stills. The first run gives a weak spirit; the second separates the aromatic heart from the heads and tails. Cognac, single malt Scotch whisky and many fruit spirits are made this way.

First run. In Scotland the wash is distilled in a large wash still and gives low wines of about 20% ABV. In Charente the wine gives a cloudy brouillis of about 30–32% ABV. This stage separates the alcohol from water, yeast and residues.

Second run. The weak spirit goes into a second still. The light heads come off first and the heavy tails at the end; both fractions are set aside and added to the next batch. The heart is the future whisky or cognac spirit: about 68% ABV in Scotland and about 70% in Charente. Under the Fine Faugères rules the spirit in the collection vessel must not exceed 70% ABV.

Copper and stills. Stills, helmets and condensers are made of copper, which binds sulphur compounds so the spirit becomes cleaner. Unlike a column, which works continuously and gives a stronger, lighter spirit in one pass, a pot still works in batches and keeps more aromatic compounds. Irish pot still whiskey is often distilled three times, while Armagnac is usually distilled once in a column.

Why this matters to you. A double-distillation mark on the label explains the style: a rich, aromatic spirit that matures well in oak. More distillations do not mean a better drink, only a different one. WHO reminds that there is no safe amount of alcohol.