How to Make It
In a chilled julep cup or fizz glass, muddle the mint leaves. Rub the bruised leaves against the side of the cup and then discard.
Add the lime juice, Cointreau, bourbon, tequila, and simple syrup. Top with crushed ice and set a swizzle stick or bar spoon in the cup and spin between your hands to mix.
Top with additional crushed ice and garnish with the mint sprigs. Serve with a cocktail straw.