Pillsbury chocolate cake mix
Leave out eggs and oil and add 10 oz of diet coke, diet cherry coke, or diet dr. pepper, regular or cherry. Stir and put in 12 cupcake liners in a cupcake pan and bake. Top with 1/4 tsp of powdered sugar, if desired. 4 SP each or about 120 calories. Non-WW husband approved and delicious with some sliced strawberries and a dab of Cool Whip on the side!
I bet a lemon cake mix with diet 7up would be AWESOME!