Neiman Marcus Cake

1 yellow cake mix
1 stick butter, melted
1 egg well beaten

1 package (8 ounces) cream cheese, softened
2 eggs, well beaten
1 box (16 ounces) powdered sugar
Mix cake mix, butter and 1 egg well and pat into 9 x 13 inch greased dish. Mix cream cheese, 2 eggs and powdered sugar well and spread over first mixture. Bake at 350 degrees for 40 minutes. Let cool and sprinkle with powdered sugar.