Chocolate orange is a pairing that needs no introduction. With this cocktail we bring together spicy smooth bourbon, the sweet sharp taste of citrus, and rich velvety chocolate. Old-fashioneds are famously simple (part of their appeal) and this stays unfussy while adding layers of flavor.
Lightly muddle orange zest with bitters and orange curaçao in an old-fashioned glass. Add bourbon and creme de cacao then stir with ice to mix. Garnish with an orange peel.