Berry Cobbler. Frozen berries, dry cake mix, and 1 can of sprite. yummy cobbler. It sounds so easy - and it is good and weight watcher friendly! Ingredients Two 12-oz bags frozen mixed berries 1 box white cake mix (no pudding) 1 can of diet 7-up or sierra mist (clear soda) Instructions Place frozen fruit in a 9x13 baking dish. Add dry cake mix over the top. Pour soda slowly over cake mix. DO NOT stir the cake mix and the pop - this will give you a 'crust'. If you stir the two, you will have a cake like topping. Bake 350 for 45-50 min. You may be able to use frozen peaches instead of mixed berries.