Preheat oven to 350 degrees F.In a medium bowl, combine cake mix, melted butter and egg. Mix until smooth and well combined.Pat and press dough evenly over the bottom of a greased 9×13 baking pan. Set aside.In a separate large bowl, beat and cream the cream cheese. Add the eggs and beat until smooth for a minute or two. Add powdered sugar and continue to beat until well combined.Pour over crust and bake at 350 degrees F for about 25-30 minutes or until done. Do not over bake.When done, remove from oven and let cool completely before cutting into bars.