I am posting this so that I will have it...
1 Box yellow cake mix
1 can sweeetened condensed milk
1 large container of cool whip
Bake cake as directed. Let cool. Poke holes in cake. Pour sweetened condensed milk over the cake...Spread the large container of cool whip on top, crush butterfingers over cool whip...drizzle with carmel (the kind you used over ice cream)