Preheat oven to 350F
Mix the cake mix according to the package.
Mix together cream cheese, butter, peanut butter and vanilla.
Add powdered sugar to the cream cheese mixture one cup at a time.
Pour cake mix into greased 13x9 pan.
By the spoonful, add the cream cheese mixture to the pan.
Sprinkle halved Reese and chocolate chips on top.
Bake for 45minutes.