What is Dry Vermouth?

Dry vermouth is fortified, aromatized wine in the French tradition: paler, less sweetened, and typically more herbaceous than Italian rosso. Production is the same family of operations — base wine, fortifying spirit, botanicals, a modest sugar addition — at roughly 16–18% ABV. It is still wine after opening; refrigeration and reasonably prompt use apply for the same chemical reasons they apply to white wine.

A martini is gin (or vodka) plus dry vermouth. Ratio is a matter of taste and era, but omitting vermouth leaves cold gin. Dry vermouth also appears in drier Manhattan variants, the Bronx, and a large class of stirred gin drinks.

White-wine fruit, citrus peel, alpine herbs, and a dry, faintly bitter finish. Dolin Dry is a widely used mixing standard: relatively light, floral, and low in residual sugar. Oxidized dry vermouth reads as stale white wine — flattened fruit, nuttiness, and a dull edge — rather than as extra dryness.

French dry vermouth — associated with Marseille and especially Chambéry — developed in the 19th century alongside the drier, paler aperitif wines of that region. The martini, in its late-19th-century form, was a vermouth-forward gin drink; subsequent decades steadily reduced the vermouth fraction until, in some mid-century American practice, it became a rinse or a gesture.

Restoring vermouth is not nostalgia. It returns the drink to a two-ingredient structure in which wine acidity, botanicals, and a little sugar mediate the spirit.

Refrigerate after opening and treat the useful life like that of an opened aromatic white wine — days to a couple of weeks for a drink in which vermouth is conspicuous. Start around 5:1 gin to vermouth for a contemporary dry martini, or nearer 2:1 to 3:1 if you want the wine to register; adjust from there.

A 375 ml bottle is the practical format for infrequent martini service.