1 box butter cake mix
1 lg. container Cool Whip
2 c. sugar
1 (12 oz.) pkg. frozen coconut, thawed
1 (8 oz.) pkg. sour cream

Bake cake as instructed on box; cool. When cool, split layers. Combine in large bowl, sugar, coconut, sour cream and Cool Whip. Mix well and spread between layers Refrigerate for 3 days before cutting. Keep refrigerated after cutting.