Ingredients
Method
Preparation
- Preheat the oven to 350°F and position the rack in the center.
- Line a 9x13 inch pan with parchment paper, allowing an overhang.
- In a medium bowl, whisk together the flour, baking powder, and salt.
- In a larger bowl, beat the softened butter with the brown sugar and white sugar until smooth.
- Add the peanut butter and mix well, then incorporate the egg and egg yolk until smooth.
- Gradually fold the flour mixture into the peanut butter mixture until combined.
- Reserve about 1 cup of the batter for later.
Baking
- Press the remaining dough into the prepared pan to form an even layer.
- Bake for 25 minutes until golden around the edges.
- Spread the marshmallow fluff over the warm baked layer.
- Pinch off pieces of the reserved dough and scatter them over the marshmallow fluff.
- Return to the oven and bake for an additional 10 minutes.
- Cool at room temperature for at least one hour.
- Lift the bars using the parchment overhang and slice into squares.
Notes
Store in an airtight container for up to one week. For freezing, wrap bars individually and store in an airtight container for up to three months.
