CHOCOLATE DING-DONG CAKE

2 boxes Devil's Food cake mix
1 c. powdered sugar
1 (8 oz.) cream cheese
1 (8 oz.) Cool Whip
2 containers Sour Cream Chocolate (or) Milk Chocolate Homestyle Icing

Mix boxes of Devil's Food cake mix as on box. Will make 3 layers. Cool completely. Mix powdered sugar, softened cream cheese and tub of Cool Whip together in a bowl. Spread between cake layers. Put chocolate icing on top and sides of cake.