Prepare cake as pkg. directs.Bake in two 9 inch round pans. Cool cakes and split each layer in half. Place one layer split side up and spread filling (consisting of 2cups fresh or frozen coconut, 16 oz. sour cream, the powdered sugar and the vanilla). Repeat with remaining layers. Frost cake with whipped topping and cover with coconut. Cover cake and refrigerate for 5 days.
Serves 12 to 14