1/2 oz of white creme de cacao (or chocolate liqueur)
1 oz of heavy cream
1 tsp of blue curacao liqueur
1 1/2 oz of Light Rum
Combine the rum, creme de cacao, and heavy cream in a shaker half-filled with ice cubes. Shake well, and strain into a cocktail glass. Drop the curacao into the center of the drink and serve.