Here is the recipe for the king cake cocktail offered at Ralph's on the Park resturant..
King Cake Cocktail 1½ oz New Orleans Spiced Rum
½ oz Butterscotch Schnapps
½ oz Vanilla Schnapps
1½ oz Cream
Garnished with Purple, Yellow and Green sugar.
For more information you can check out..
http://www.ralphsonthepark.com/menu_display.php?id=25