This is a delicious fudge-like chocolate frosting, and it's easy to make when you're in a hurry. It's boiled for just one minute and made with ingredients you probably already have on hand. This frosting is perfect for a simple sheet cake, firming up nicely for easy slicing. It can also be drizzled over a bundt cake or tube cake. The recipe can be doubled for a thicker layer of frosting. It's not only simple, but it's also made with only five ingredients.