1 1/2 oz of Light Rum
1 tsp of green chartreuse (or chartreuse)
1 oz of Pineapple Juice
1/2 oz of Lime Juice
1 tsp of white creme de cacao (or chocolate liqueur)
crushed ice (or ice)
Combine ingredients in a shaker half-filled with ice cubes. Shake well, strain into an old-fashioned glass almost filled with crushed ice, and serve.