1 box white or yellow cake mix
1 can sweetened condensed milk
1 can pina colada mix
1 sm. carton Cool Whip
1 sm. pkg. frozen coconut

Prepare cake mix according to package directions in a sheet pan. As soon as the cake comes out of the oven, stick holes in top of cake in pan.

Mix together sweetened condensed milk and pina colada mix; pour over cake. Let cake cool completely. Place in refrigerator.

After cake cools, spread Cool Whip over cake; top with small package of frozen coconut. Keep refrigerated.