Birthday Martinis Birthday Cake Martini 1.5 ounces vanilla vodka 1.5 ounces cranberry juice 1/2 ounce champagne Rim glass with Sprinkles (cake frosting helps to make them stick). Combine vodka and cranberry juice in an ice shaker, half-filled with ice cubes. Shake well. Strain into glass. Top with Champagne. Drop in cherry. Enjoy!