Description
Soft and chewy Fluffernutter Bars made with rich smooth peanut butter, brown sugar, and a sweet layer of marshmallow fluff. This easy peanut butter dessert is perfect for slicing into shareable bars.
Ingredients
Scale
- 2 1/4 cups all-purpose flour
- 1 teaspoon baking powder
- 1/4 teaspoon salt
- 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 other egg, discard the white
- 7 oz jar marshmallow fluff
Instructions
- Preheat the oven to the temperature specified by your baking setup and prepare a baking pan with parchment paper, leaving an overhang for easy removal.
- In a medium bowl, whisk together the all-purpose flour, baking powder, and salt. Set aside.
- In a large mixing bowl, beat the softened butter, brown sugar, and white sugar until smooth and well combined.
- Add the smooth peanut butter and beat until incorporated. Add the whole egg and additional egg yolk, then mix until the mixture is smooth and evenly combined.
- Gradually add the dry ingredients to the peanut butter mixture. Mix just until the flour is incorporated. Do not overmix.
- Transfer the thick batter to the prepared pan and spread it evenly into the corners with a spatula.
- Spoon the marshmallow fluff over the peanut butter batter and gently spread it into an even layer.
- Bake in the preheated oven until the bars are baked through and set, checking toward the end of the expected baking time.
- Remove from the oven and allow the bars to cool completely in the pan.
- Once cooled, lift the bars from the pan using the parchment overhang and cut into squares or rectangles with a sharp knife.
Notes
- Use softened, not melted, butter for the intended tender texture.
- Smooth peanut butter gives the bars their creamy peanut butter consistency.
- Cool the bars completely before slicing for cleaner portions and a more settled marshmallow layer.
- Prep Time: 20 minutes
- Cook Time: 25 minutes
- Category: Dessert
- Method: Baked
- Cuisine: American
Nutrition
- Serving Size: 16 bars
- Calories: 335 calories
Keywords: fluffernutter bars, fluffernutter bar recipe, peanut butter marshmallow bars, peanut butter bars, marshmallow fluff bars