Preheat oven to 350. In a large bowl, slightly beat one egg. Add cake mix and butter; stir until well blended. Press mixture into a greased and floured 9 x 13 baking dish.
In a medium bowl, combine powdered sugar, cream cheese and remaining 2 eggs; pour over cake mixture. Spread pie filling over cream cheese mixture. Bake 30 to 40 minutes or until outer edges are lightly browned and center is almost set. Cool completely. Cover and store in refrigerator. Serve at room temperature.