XO Brandy, American Whiskey, Sweet Vermouth, Herbal Liqueur, Bitters A classic cocktail from New Orleans, an indulgent and luxurious sipping drink. . XO French brandy, American whiskey and sweet vermouth provide an oaky, luxurious base, while herbal liqueur and bitters add layers of complexity. Serve well chilled in a rocks glass over ice and garnish with a lemon peel and cherry.