While cake is baking, mix milk and caramel topping until well blended. When the cake is done and while it is still hot, poke holes in it (I use something round like the end of a wooden spoon). Pour mixture over the cake and allow cake to cool completely.
Sprinkle half of the candy bars over the cake. Spread Cool Whip over the top, then sprinkle the remaining candy crumbles on top. Cover and Chill