Preheat oven to 350 degrees.
Mix the cake mix, 2 eggs and melted butter with an electric mixer on low speed until mixed well.
Pour into a greased, 9x13 inch pan
Mix together the cream cheese, remaining 2 eggs and powdered sugar with an electric mixer on low speed until blended, beat an additional 30 seconds.
Pour over cake mixture.
Bake for 35 to 40 minutes.
Sprinkle with powdered sugar before serving.