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Fluffernutter Bars

Chewy peanut butter bars made with Domino® light brown sugar are topped with gooey marshmallow fluff, extra peanut butter, and a slightly crisp peanut butter topping, turning your favorite childhood sandwich into an afternoon treat!

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Ingredients

Base and Top

  • ½ cup Unsalted butter, room temperature

  • 1 cup Domino® Light Brown Sugar, packed
  • 2 teaspoons Vanilla extract
  • ½ cup Creamy peanut butter
  • 1 large Egg, room temperature
  • 1 ½ cups All-purpose flour
  • ½ teaspoon Kosher salt

Filling

  • ¼ cup Creamy peanut butter, melted

  • 1 container (7.5oz) Marshmallow fluff

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Instructions
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Prep Time: 15 minutes / Cook Time : 30 minutes / Yields: 16 bars

Step 1

Preheat the oven to 350°F and line an 8” square pan with two strips of parchment paper that go up the sides to easily remove the bars before cutting.

Step 2

In the bowl of a stand mixer fitted with the paddle attachment or using a hand mixer, cream together the butter, Domino® Light Brown Sugar, and vanilla for about 3 minutes until light and fluffy. 

Step 3

Add the peanut butter and egg and beat until combined then scrape down the sides.

Step 4

Add the flour and salt and mix until mostly combined. Fold in any excess flour by hand.

Step 5

Press 2/3 of the dough into the bottom of the baking dish, getting the whole way to the sides and corners.

Step 6

Drizzle the peanut butter on top of the dough, then spread the marshmallow fluff on top of the peanut butter.

Step 7

Flatten the leftover pieces of dough and place them on top of the marshmallow fluff, leaving a few pockets of fluff exposed. 

Step 8

Bake for 25-30 minutes until the tops look slightly golden brown. Transfer to a wire rack and cool in the pan for 1 hour. Remove the bars from the pan using the parchment paper overhangs and place them back onto the wire rack to cool completely. 

Step 9

Slice and serve. 

Additional Tips

Spray the spatula with cooking spray to help prevent sticking when spreading the marshmallow fluff onto the bars. Also spray the knife with cooking spray before cutting the bars to prevent sticking.

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Callan Wenner

Meet the Chef:

Callan Wenner

Callan Wenner is the owner (and cookie connoisseur) of The Cozy Plum, a food blog creating elevated bakery-style desserts, savory bites and breakfast items, and captivating visuals that appeal to the appetites of cooks and bakers of all skill levels. Each recipe is carefully developed with thoughtfully curated ingredients and techniques, and thoroughly tested to ensure success for anyone who recreates it.