Fluffernutter Bars

(496)
"Fluffernutter bars!! pb and marshmallows are just meant to be together!"
-- @lovevivvv

A Note from Feedfeed

A soft, peanut butter-infused base is topped with a creamy peanut butter filling and a generous layer of gooey marshmallow fluff, creating a treat that will satisfy any sweet tooth. These bars are a delightful twist on a classic flavor pairing, perfect for sharing or enjoying as a special treat.

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  • Recipe Card
Prep time 20mins
Cook time 30mins
Serves or Makes: 16 bars

Recipe Card

For the peanut butter bars

ingredients

  • 2 1/2 cups all purpose flour
  • 1/2 teaspoon baking soda
  • 1 teaspoon salt
  • 3/4 cup unsalted butter, at room temperature
  • 3/4 cup smooth peanut butter
  • 1/2 cup sugar
  • 1 cup packed light brown sugar
  • 2 large eggs, at room temperature
  • 2 teaspoons vanilla extract
  • 1 (7 ounce) jar Marshmallow Fluff, for topping

For the peanut butter filling

ingredients

  • 1/2 cup smooth peanut butter
  • 3 tablespoons unsalted butter, at room temperature
  • 1 1/2 cups powdered sugar, sifted
  • 3 tablespoons heavy cream
  • 1/2 teaspoon vanilla extract

Method

  • Step 1

    Preheat oven to 350°F. Grease and line a 9x9 inch baking pan with parchment paper, leaving an overhang for easy removal.

  • Step 2

    In a medium bowl, whisk together flour, baking soda, and salt. Set aside.

  • Step 3

    In a large bowl, cream together the butter, peanut butter, granulated sugar, and brown sugar until light and fluffy, about 2-3 minutes. Add eggs, one at a time, beating well after each addition. Stir in vanilla extract.

  • Step 4

    Gradually add the flour mixture to the wet ingredients, mixing until just combined.

  • Step 5

    Press the dough evenly into the prepared pan. Bake for 25-30 minutes, or until lightly browned and a toothpick inserted into the center comes out clean. Remove from oven and let cool slightly.

  • Step 6

    While the bars are cooling, prepare the peanut butter filling. In a medium bowl, beat together peanut butter and butter until smooth. Add powdered sugar, vanilla extract, and 2 tablespoons of heavy cream. Beat until smooth and creamy, adding an additional tablespoon of heavy cream if needed to achieve a spreadable consistency.

  • Step 7

    Using the back of a spoon or an offset spatula, spread the peanut butter filling over the warm bars in the pan.

  • Step 8

    Warm the Marshmallow Fluff in the microwave for a few seconds to make it easier to spread. Spread the Fluff over the peanut butter filling.

  • Step 9

    Allow the bars to cool completely in the pan before slicing into squares. Serve at room temperature.