One of Max's favorite things in the whole world is Birthday Cake. He has told me "Happy Birthday" out of the blue on occasion, and then asked for birthday cake. He's a funny guy.
If you want a really great birthday cake, might I suggest:
Make a Guinness chocolate cake
Make some buttercream icing
Make some cherry topping
Frost the cake with the icing and add some cherries upon serving. It is a tasty treat.