Sinful Chocolate Cake

1 box Chocolate Cake mix
1 Can Sweetened Condensed Milk
1 Jar Caramel Ice Cream Topping
1 Tub Cool Whip
1 Bag Heath Candy bar bits

Bake chocolate cake according to directions. Poke holes in it. Spread one can of sweetened condensed milk and 1 jar of caramel ice cream topping over the warm cake. Refrigerate. Top with …a tub of Cool Whip and a bag of Heath candy bar bits.