An Irish Car Bomb is an American beer cocktail that is drunk as a bomb shot, similar to a boilermaker. It is made with Irish stout, Irish cream, and Irish whiskey. To make the drink, whiskey is floated on top of Irish Cream in a shot glass, and the shot glass is then dropped into the stout. Once mixed, it must be drunk quickly because it will curdle. While Kahlúa was part of the original recipe, it is often excluded from the drink today. Some refer to that original recipe as a Belfast Car Bomb.