How about chocolate cheesecake. This way you get your chocolate and cake and since it's cheese cake it's actually more of a pie pretending to be a cake. So in a way your getting all three.
Chocolate! It's amazing. Andyou can have many different types of some of the most delicious chocolates. You can also mixthem with peanut butter, marshmellow, nuget, caramel, and the stuff they put in a crunch bar. Mmmm. Chocolate. It can be healthy for you too. Chocolate wins.