To make that cake, you just mix a 12-oz. can (or 1 1/2 cups) of diet soda with an 18.25-oz. box of cake mix -- don't add ANYTHING else. Then just bake it up in the oven at 350 degrees. (Refer to the box of cake mix for pan size and bake time.) Easy and WAY lower in calories and fat than the standard back-of-box cake recipe, which typically calls for eggs and oil. hmmm...might have to try this.