Coconut Cake

1 box Cake mix, white

1 cup Coconut                                                           

1 1/2 cups Milk                 

1/2 cup Sugar

8 oz Cool whip

Bake cake according to box directions in 13x9 pan. Allow to cool for 15 minutes. Mix milk, sugar and 1/2 cup coconut to a boil, simmer for 1 minute then spoon on warm cake. Cool completely. Stir 1/2 cup coconut into whipped topping and spread over cooled cake. Chill overnight.