To a box of chocolate cake mix and you've got a delicious chocolate cake!
No eggs, no oil and no water needed.
Combine the chocolate cake mix and can of Diet Coke
Bake as directed on box
To maintain the "healthiness" of the cake, add fat free cool whip rather than frosting.
I didn't believe Steve the first time he made this recipe, but I've made it a few times since and have received excellent reviews.