Put your microwave to use for more than just reheating leftovers. Here it's what you will be using to "bake" a chocolate cake, and it just might be a game changer for busy bakers who are usually too short on time to make a cake from scratch. You'll need a glass or other microwave-safe dish in which to cook the batter, and even a bowl will suffice. The cooking time will vary by model, but begin checking with a toothpick after abuot 5 minutes.