Coconut Sour Cream Cake
["1 box white cake mix", "1 (8 oz.) sour cream", "1 2/3 c. sugar", "2 (6 oz.) pkg. frozen coconut", "1 large Cool Whip"]
["Prepare cake according to directions.", "Cool.", "When cake is cool, split layers and fill with filling mixture; frost with Cool Whip.", "Sprinkle with a little frozen coconut on top of cake. Chill overnight."]
["white cake mix", "sour cream", "sugar", "frozen coconut"]