1 white cake mix
1 lg. carton sour cream
1 lg. container Cool Whip
1 pkg. frozen coconut

Prepare cake according to package directions. Pour into 3 prepared cake pans. Do not let cake brown. Cool. Combine sour cream and coconut to spread between layers. Save 1 cup mixture for icing.

ICING: Combine mixture with Cool Whip and ice cake. Cover and let set in refrigerator for 3 days.