Although there are many opinions regarding the origins of the Three Milk Cake, the reality is that recipes always have something different, just like this Coffee Three Milk Cake on Sheet recipe. For this peculiar Three Milk Cake recipe, you need to whip the coffee and chocolate cream at a very low temperature to achieve the proper stability for decorating with a piping tip. Remember that whatever your Three Milk Cake recipe is, the important thing is to ensure it is perfectly moist, and this is only achieved by soaking the mixture several times.