1 c. sugar
6 oz. coconut
1 box butter cake mix
8 oz. sour cream
8 oz. Cool Whip

Prepare cake mix according to directions on box. Bake in 2 (8-inch) pans. After cooling, split both layers. Blend together sugar, sour cream, coconut and Cool Whip. Spread mixture between layers and over top and sides. Refrigerate overnight before serving.