Ingredients:
1 cup butter, room temperature1 cup light brown sugar
1/2 cup granulated sugar
1/2 cup peanut butter
2 tsp vanilla
2 eggs
1 tsp baking soda
2 1/2 cups flour
1 tsp salt
2 cups coarse chopped peanut butter cups (10.5 oz bag)
1 cup Marshmallow Creme
Directions:
1. Preheat oven to 350 degrees F.
2. Spray a 9×13 baking dish with cooking spray.
3. Cream butter and peanut butter together.
4. Add sugars and beat until light and fluffy.
5. On medium speed add in eggs and vanilla and mix until incorporated. 6. Stir in your baking soda, salt and flour until just combined.
7. Fold in your chopped peanut butter cups. 
8. Spread the batter in your prepared pan. 
9. Drop you Fluff randomly on top of the batter and swirl in with a knife. 
10. Bake for 30-35 minutes until toothpick placed 1 inch from side comes out clean. 
11. Remove from oven and let cool on wire rack.12. Cut into squares when cooled.
