Better than sex cake

1 German Chocolate Cake Mix
1 can sweetened condensed milk
1 small jar caramel ice cream sauce
1 8oz. container of Cool Whip
1 Heath candy bar, crushed

Bake cake in a square pan according to package directions.
After removing from oven, poke holes in the cake with the
end of a wooden spoon. Pour caramel sauce and sweetened
condensed milk over the cake. Cool. When cake is cool, frost
with Cool Whip and put crushed Heath bar on top. Keep
refrigerated until ready to serve.