Dreamy Coconut Cake

1 box white cake mix
1 can sweetened condensed milk
1 ( 9 ounce) carton non dairy whipped topping
1 ( 8 1/2 ounce) can of cream of coconut
1 ( 6 ounce) package frozen coconut, thawed

Grease a 9x13 pan.   Bake according to package directions.   While cake is still hot, punch holes in top and pour milk over entire top; cool.   Mix whipped topping and cream of coconut together by hand and spread on cake.   Top with coconut.   Refrigerate leftover cake.