1 box yellow cake mix
1/2 c. butter
1 egg

Combine in bowl until crumbly. Press mixture into a greased and floured 12 x 9 x 2 inch pan. Cover with topping.

TOPPING:

1 lb. pkg. powdered sugar
1 (8 oz.) cream cheese, softened
2 eggs
1 tsp. vanilla

Combine all ingredients in bowl; pour over crust layer. Bake at 350 degrees for 35 minutes or until golden brown. Let cool; cut into bars.