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Fluffernutter Bars Recipe

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3.9 from 67 reviews

Delicious Fluffernutter Bars feature a rich peanut butter cookie base topped with a gooey marshmallow fluff layer and finished with dough pieces for a delightful texture contrast. These bars combine creamy peanut butter and sweet marshmallow in a chewy, irresistible treat perfect for any occasion.

  • Total Time: 1 hour 50 minutes
  • Yield: 15 bars

Ingredients

Dry Ingredients

  • 2 1/4 cups all-purpose flour
  • 1 teaspoon baking powder
  • 1/4 teaspoon salt

Wet Ingredients

  • 3/4 cup unsalted butter, softened
  • 3/4 cup brown sugar
  • 1/3 cup white sugar
  • 1 1/2 cups smooth peanut butter*
  • 1 large egg
  • 1 large egg yolk (in addition to the egg, discard the white)

Topping

  • 7 oz jar marshmallow fluff

Instructions

  1. Prepare Oven and Pan: Preheat the oven to 350°F and position the oven rack in the middle. Line a 9×13 inch pan with parchment paper, leaving an overhang on the edges, or line it with aluminum foil and lightly grease.
  2. Mix Dry Ingredients: In a medium bowl, whisk together the flour, baking powder, and salt to combine evenly.
  3. Cream Butter and Sugars: In a large bowl, beat the softened butter, brown sugar, and white sugar together until soft and fluffy.
  4. Add Peanut Butter and Eggs: Beat in the smooth peanut butter until incorporated. Then add the whole egg and additional egg yolk, mixing until smooth and uniform.
  5. Incorporate Dry Ingredients: Gradually mix in the flour mixture in halves with the mixer on low speed until fully combined.
  6. Reserve Dough and Press Base: Remove about 1 cup of dough and set aside. Press the remaining dough evenly into the bottom of the prepared pan to form the base layer.
  7. Bake Base Layer: Bake the peanut butter base for 25 minutes until it looks set and baked through.
  8. Add Marshmallow Topping: Remove the pan from the oven and keep the oven on. Carefully spread the entire jar of marshmallow fluff evenly over the base.
  9. Top with Reserved Dough: Pinch off pieces of reserved dough, flatten them slightly to about 1 inch size, and scatter them over the marshmallow layer until approximately 80-90% coverage.
  10. Bake Final Layer: Return the pan to the oven and bake for an additional 10 minutes until the peanut butter dough topping is set.
  11. Cool Bars: Remove from oven and allow bars to cool at room temperature for at least 1 hour to set before slicing.
  12. Slice and Serve: Use the parchment paper overhang to lift bars from the pan onto a cutting board. Lightly grease a sharp, thin knife with non-stick spray to prevent sticking and slice into 15 bars.

Notes

  • Avoid natural or homemade peanut butter without stabilizers as it can separate causing too much or too little oil. If using crunchy peanut butter, increase quantity to 1 3/4 cups.
  • Metal pans produce crispier edges, while glass pans yield softer edges.
  • Store bars in an airtight container at room temperature for up to 5 days.
  • Nutrition info is approximate based on 15 bars.
  • Author: Adeline
  • Prep Time: 15 minutes
  • Cook Time: 35 minutes
  • Category: Dessert
  • Method: Baking
  • Cuisine: American

Find it online: https://flavorhug.com/fluffernutter-bars-recipe/