Prepare cake mix according to the directions on the package. (Bake in a 13x9 inch cake pan.) Remove cake from oven when done; make holes in cake with a straw. Pour butterscotch topping on cake.
Place cake back in warm oven - making sure the oven is turned off - for 10 minutes. Remove cake and pour sweetened condensed milk over top. Put chocolate chips over milk. Put 2 containers of Cool Whip on top of chocolate chips. Break SNICKERS® bars with a hammer and put on top of the Cool Whip. Place in refrigerator until ready to eat. This is better if made the day before.
