One cake mix of your choice, really, and whatever it says on the package to make the cake.
One jar of hot fudge topping
One jar of caramel topping
One container of Cool Whip
Fruit, nuts, whatever you like to put on top!
Bake either a vanilla or chocolate cake mix according to directions in a rectangle pan. While it is still hot from the oven, poke holes in the cake all over and pour one each of heated caramel topping and heated hot fudge toppings over the cake, it will seep into the holes you made into the cake. When it completely cools, cover it with whipped topping and then chopped walnuts and strawberries, or whatever!