― A special spring and summer treat! ∙ 2 cups unsweetened frozen or drained canned raspberries, strawberries or blackberries ∙ 2 cups unsweetened blueberries ∙ 1 can 7up or sprite ∙ 1 white cake mix ∙ Whipped cream ∙ Place frozen fruit in an oil spray 9x13 baking dish. Add dry cake mix over the top. Pour soda slowly over cake mix. Don't stir the cake mix and the soda, the trick of this is to make the crumb like topping and this is how it will come out. If [...].