Vermouth has quietly become the secret weapon of serious bartenders, and for good reason. Unlike the one-dimensional bottles of decades past, today's vermouths—especially from producers like Dolin, Carpano, and Cocchi—are built on sophisticated herb blends that can make or break a Manhattan or Negroni. The Gateway Vermouth Start with Dolin Vermouth de Chambéry, a lighter, herbaceous French vermouth that works beautifully in a Martini without overpowering the gin. The key is using fresh vermouth; once opened, it oxidizes within weeks. Keep your bottle in the refrigerator and consume it within 30 days for optimal flavor. Bartenders at top cocktail bars now treat vermouth like they would a premium spirit—because it is one. "Vermouth isn't a modifier," says craft cocktail expert James Holloway. "It's a primary ingredient that deserves respect." If you've been making Negronis with whatever vermouth was on sale, you're missing the depth that a quality red vermouth like Carpano Antica Formula brings: dried fruit, spice, and a silky finish that transforms the entire drink.