Heat oven to 350 degrees. Grease a 9x13 baking dish. Beat all ingrediants until smooth. Pour mixture into the prepared baking dish. Bake 25 to 30 minutes. Cool completely and frost with your favorite chocolate frosting.
You can mix it up by adding chopped walnuts before baking or add them to the top of the frosting. If you would like you could use vanilla buttercream or a strawberry frosting to mix things up even further.