Hi Nancy, I had this cake yesterday at a fish fry I attended and it is to die for!
Brenda/Ala

Gooey Chocolate Cake

1 chocolate cake mix
1 jar caramel ice cream topping
1 can Eagle Brand condensed milk
1 lg. Cool Whip
1 pkg toffee crumbles or Heath bars

Bake cake according to package instructions in 9x13 inch pan. Poke holes all over top. Mix caramel topping and condensed milk and pour over cake when almost cool. Allow it to sit (in the refrigerator overnight covered). Spread Cool Whip over cake. Sprinkle with toffee topping;
Can use Heath bars crushed.

http://www.nancyskitchen