Preheat oven to 350. Make brownies according to directions using greased foil in the pan. Cool.
Mix all filling ingredients until combined. Spread over brownies.
Baking Beauty Tip: Spray your measuring cup with non-stick cooking spray before measuring the peanut butter. This will make it come out easy, without leaving behind any of its creamy goodness.
Melt topping ingredients, cool slightly. Spread over peanut butter filling.