Step One:

1 pkg. yellow cake mix
1 stick melted butter
1 egg

Mix together and fold into 9 x 13 pan.

Step Two:

8 oz. softened cream cheese
2 eggs
1 1/2 tsp. vanilla extract
1 box powdered sugar (keep some for end)

Mix together and pour into pan on top of mixture.

Bake 30 to 40 minutes at 350°F. Sprinkle with remaining sugar while still hot. Let cool and cut into squares. Unbelievable.