1 1/2 oz. Gin - (more)
1 tbsp. Milk - (more)
1/2 oz. Dark Rum - (more)
1/2 tsp. Powdered Sugar - (more)
1/4 Lemon (Juice of, fresh) - (more)
Carbonated Water - (more)
Shake all ingredients (except carbonated water) with ice and strain into a collins glass over ice cubes. Fill with carbonated water, stir, and serve.