Think of the Boulevardier as the Negroni’s rich, whiskey-loving cousin. Created in the 1920s by American expat Erskine Gwynne, this cocktail swaps out gin for bourbon or rye, blending it with Campari and sweet vermouth for a drink that’s bold, bittersweet, and irresistibly smooth. With its deep, warming character, it’s perfect for slow sipping and cooler nights—whether in a Parisian café or your favorite dimly lit bar.