Place ice, cream of coconut, and half & half in a blender and blend until smooth. Add green food coloring if desired.
Divide mixture between 2 large glasses or 4 small ones. Scoop in one large scoop of sherbet into each glass. Top with about ½ cup soda in each glass (That’s if you’re making 2 servings. If you’re making 4 small glasses, use about ¼ cup soda in each glass).
Top with whipped cream and gold sprinkles if desired.