Diet Coke Cake - cooking recipe

Ingredients

1 (18 ounce) chocolate cake mix (I prefer a \"fudge\" cake mix with pudding in the mix, but this recipe will work with whatever you hav)
1 (12 ounce) can Diet Coke
1 (8 ounce) container Cool Whip Free or (8 ounce) container Cool Whip Lite

Preparation

Preheat oven to temperature on cake mix box.
Grease a 9x13 pan.
Combine cake mix and Diet Coke in large mixing bowl. Mix according to directions on box. (For example, my favorite brand says to mix at medium speed for 2 minutes!).
Pour into 9x13 pan. Bake 5 minutes less than the recommended time on the box. For example, if the box says to bake a 9x13 cake for 28 minutes, bake your Diet Coke Cake for 23. Cake is done when a fork or toothpick inserted in the middle of the cake comes out clean.
Cool in pan on wire rack.
When cooled, frost with Cool Whip topping.
Refrigerate leftovers. (I never have any!).
Enjoy!