I pkg Pillsbury Moist Supreme white cake mix
Prepare mix as directed using water, oil, and egg (Whites). Spread batter in prepared dish.

1 can (15 3/4) lemon pie filling
Drop pie filling by teaspoonful evenly onto batter. Bake at 350 degrees for 30-40 minutes. Cool in pan completely.

1 can (16 oz) Pillsbury Creamy Supreme lemon frosting
8 oz cool whip, thawed
Combine frosting and cool whip. Blend well. Spread over cooled cake.