1 1/2 oz of Dark rum
1/2 oz of dark creme de cacao (or chocolate liqueur)
2 oz of hot chocolate
1 tsp of heavy cream
Pour the dark rum, dark creme de cacao and hot chocolate (room temperature) into a cocktail shaker half-filled with ice cubes. Shake well, and strain into a cocktail glass. Add the cream into the center of the drink, and serve.