1 pkg. Pillsbury Plus yellow cake mix
1/2 c. cutter or butter, softened
3 oz. cream cheese, softened
1/4 c. firmly packed brown sugar
1/2 tsp. cinnamon
3 apples, thinly sliced
1 c. sour cream
1 egg

Heat oven to 350 degrees F. Combine first 3 ingredients; mix until crumbly. Reserve 2/3 cup for topping; add brown sugar and cinnamon to reserved topping mix. Mix well; set aside. Press remaining mixture onto bottom of ungreased 13x9 inch pan. Arrange apple slices over base. Blend sour cream and egg; spread evenly over apples. Sprinkle reserved topping mixture overall. Bake at 350 degrees F. for 25 to 30 minutes or until topping is golden brown and bubbly. Serve warm. Refrigerate leftovers. Makes 12 to 15 squares.