Noilly Prat (French pronunciation: [nwa.ji pʁat]) is a brand of vermouth from France. "White" Noilly Prat is the archetype of dry, straw-coloured French vermouth. Noilly Prat now makes Red and Ambre vermouths as well, introduced in the 1960s and 1980s, but they are less widely known. Noilly Prat Dry is 18% alcohol by volume. The Noilly Prat company is based in Marseillan, in the Hérault département of southern France, and is a subsidiary of Bacardi-Martini. Joseph Noilly, a herbalist, developed the first formula in 1813.
It has long been known that leaving wine in a barrel alters its characteristics. Wine that was transported long distances in barrels and exposed to the weather became darker in colour and fuller-flavoured. It was to mimic this natural process that Joseph Noilly, in 1813, designed a process that made France's first vermouth. In 1855, his son Louis Noilly and son-in-law Claudius Prat set up the company that became Noilly Prat, moving the business to Marseillan where it remains to this day. The brand was acquired by its Italian competitor Martini & Rossi in 1971, which was merged into the Bacardi-Martini family of brands in 1992.
The process used today is virtually unchanged since the 1850s. Noilly Prat is made exclusively from white grape varieties grown in the Marseillan area, principally Picpoul de Pinet and Clairette. These produce light, fruity wines which are matured in massive Canadian oak casks inside the original storerooms. The wine stays in these casks for 8 months, maturing and absorbing the flavour of the wood, before being transferred to smaller oak barrels which are taken outside and left for a year. Here they are exposed to the sun, wind, and low winter temperatures, while the wine is slowly changing. The result is a wine that is dry, full-bodied and amber coloured, similar to Madeira or Sherry. During the year outside, 6 to 8% of the volume is lost to evaporation, the "angels' share".