1 box Duncan Hines cake mix
1 can condensed milk
1 can cream of coconut
1 lg. Cool Whip
1 can flake coconut

Bake sheet cake according to directions on box. Mix cream of coconut and condensed milk together. Pierce holes in cake and pour mixture over cake. Cover and refrigerate overnight. Spread Cool Whip over cake and sprinkle the coconut. Keep refrigerated. The longer it sets, the more yummy it becomes.