Angel Pillow Cake

1 (18.25 oz.) box white cake mix
1 can lemon pie filling

Mix cake as directed on box and pour batter into a 9 x 13-inch pan. Place spoonfuls of lemon pie filling over the batter. Bake as directed on box. Let cool completely.

Frosting:
1 container ready-to-spread lemon flavored frosting
1 (8 oz.) tub cool whip

Mix frosting and cool whip together and spread on cake. Store in refrigerator.