Loretta Lynn`s Coal Miner`s Daughter`s Gooey Cake

1 box German chocolate cake mix

1 can sweetened condensed milk

1 cup Cool Whip�

3 Heath candy bars -- frozen

1 jar caramel topping

Bake cake according to directions. While warm, poke holes halfway into cake, about 1" apart. Pour condensed milk into holes. Pour caramel over cake and refrigerate. Once cooked, top with Cool Whip and crushed candy bars. Refrigerate overnight.