- 1 (18 ounce) box white cake mix
- 12 ounces frozen raspberries
- 12 ounces frozen blueberries
- 2 cups diet 7-up
Pour 7Up over whole pan (again, do not stir).
Cover and bake for 20 minutes at 350°F, then uncover and bake for another 20-30 minutes.
Makes 12 servings.
Can also be cut in half.
I used a 9x9 in pan and a box of Jiffy cake mix, small skinny blue and white box, and one cup of diet 7-up.