2 c. sugar
8 oz. sour cream
1 pkg. frozen coconut
1 Duncan Hines orange cake mix
1 (8 oz.) container Cool Whip

Mix sugar, sour cream, and coconut together and refrigerate 2 hours. Bake cake mix according to package directions in 9 inch round pans. When cool, cut into 4 layers. Mix Cool Whip with coconut mixture and spread between layers and on top of cake. Keep in refrigerator.