Preheat oven to 325 for dark or nonstick pans, or 350 for shiny metal or glass pan.
Prepare cake mix as per instruction.
Divide evenly into two bowls.
Pour dry Jello mixture into one of your batter bowls. DO NOT prepare the Jello as instructed!
Layer the White batter with swirly layers of the Jello batter.
Bake as instructed on your cake mix. Cool completely.
Cover the entire cake with the Whipped Topping.
Because of the Whipped Topping, store leftovers in the fridge.