Fluffernutter Bars Recipe
Imagine the nostalgia of a classic childhood sandwich transformed into a soft, gooey, and sweetly irresistible treat—that’s the pure magic of Fluffernutter Bars! These bars feature layers of creamy peanut butter, golden brown sugar, and airy marshmallow fluff swirled together, topped with peanut butter chips for extra decadence. Perfect for potlucks, bake sales, or an afternoon pick-me-up, Fluffernutter Bars deliver comfort in every single bite. Whether you’re sharing with friends or sneaking a piece straight from the pan, this recipe is bound to spark joy (and maybe a little happy dancing in the kitchen). Once you try them, they’ll become your go-to simple dessert bar!
Ingredients You’ll Need
Ingredients You’ll Need
The ingredient list for Fluffernutter Bars is delightfully straightforward, and each component plays a starring role in achieving that perfect blend of soft, chewy, and deliciously sweet. These pantry staples come together to deliver maximum flavor and that signature gooey texture.
- Unsalted butter (½ cup, softened): Butter brings richness and helps create that classic soft bar texture; softening it ensures easy creaming and even mixing.
- Granulated sugar (½ cup): This provides sweetness and gives the bars a tender crumb.
- Brown sugar (½ cup): Adds a subtle caramel depth and extra moisture for a chewier bite.
- Creamy peanut butter (½ cup): Peanut butter is the star that infuses each bite with its signature nutty, salty essence.
- Large egg (1): Binds everything together and helps with structure.
- Vanilla extract (1 teaspoon): Rounds out the flavors and gives a warm, inviting aroma.
- All-purpose flour (1 cup): Provides the foundation for the bars, keeping them sturdy yet soft.
- Baking powder (½ teaspoon): Gives just a slight lift for a tender crumb.
- Salt (¼ teaspoon): Balances out the sweetness and enhances all the flavors.
- Marshmallow fluff (1 cup): Adds that ooey-gooey layer, delivering the signature Fluffernutter Bar experience you crave.
- Peanut butter chips (½ cup, optional): Extra decadence on top, for another layer of peanut-buttery bliss.
- Nonstick spray or parchment paper: Ensures your bars pop out easily and cleanup is a breeze.
How to Make Fluffernutter Bars
Step 1: Prepare the Pan and Oven
Start by preheating your oven to 350°F (175°C)—this ensures your Fluffernutter Bars bake evenly. Line an 8×8-inch baking pan with parchment paper, leaving some overhang for easy lifting later, or give it a light coat of nonstick spray. This small step is a game-changer when it’s time to slice and serve.
Step 2: Cream Butter and Sugars
Grab a large mixing bowl and cream together the softened unsalted butter, granulated sugar, and brown sugar. Beat these until the mixture is light, fluffy, and well combined. This not only dissolves the sugars completely but also promises a soft, melt-in-your-mouth texture for your bars.
Step 3: Add Peanut Butter, Egg, and Vanilla
Mix in the creamy peanut butter, then follow with the egg and vanilla extract. Continue mixing until your batter is completely smooth and looks irresistibly silky. This is where those signature nutty, fragrant flavors start to build.
Step 4: Combine Dry Ingredients
In a separate bowl, whisk together the all-purpose flour, baking powder, and salt. Gradually add this mix to your wet ingredients, folding gently until just combined. Be mindful not to over-mix so the Fluffernutter Bars stay tender and soft.
Step 5: Assemble and Layer
Spread about two-thirds of the dough into the prepared pan, pressing it into an even layer. Dollop the marshmallow fluff all over and gently spread it to cover as much surface as possible—it’s okay if it’s rustic and not perfectly even! Top with the remaining dough in small spoonfuls, then gently swirl or spread for pretty streaks of marshmallow peeking through. Sprinkle with peanut butter chips, if desired.
Step 6: Bake to Golden Perfection
Bake for 25 to 28 minutes, or until the top is beautifully golden and the edges look set. The center should still look a touch soft—this means you’ll get that ideal gooey texture once cooled. Let the bars cool completely in the pan for easy, clean slicing.
How to Serve Fluffernutter Bars
Garnishes
Dress up your Fluffernutter Bars with a light dusting of powdered sugar, a drizzle of melted chocolate, or a sprinkle of flaky sea salt for a modern sweet-salty twist. For peanut butter super-fans, an extra dollop of creamy peanut butter on top makes them extra decadent.
Side Dishes
Pair these bars with a scoop of vanilla ice cream for a dreamy dessert or serve alongside fresh fruit like strawberries for a fun, nostalgic treat. A cold glass of milk or a cup of coffee is the ultimate way to rounds out the gooey, rich flavors of your Fluffernutter Bars.
Creative Ways to Present
Cut the bars into different shapes—squares, rectangles, or even tiny bites for party platters. Stack them high and tie with ribbon for edible gifts. Or, sandwich a scoop of ice cream between two small bars for an outrageous Fluffernutter Bar ice cream sandwich everyone will adore.
Make Ahead and Storage
Storing Leftovers
Leftover Fluffernutter Bars keep beautifully at room temperature, snug in an airtight container, for up to three days. They stay fresh, soft, and gooey—perfect for snack attacks or unexpected guests.
Freezing
To stretch out the treat, wrap bars individually in plastic wrap and tuck them into a freezer-safe bag or container. They freeze well for up to two months. Just thaw at room temperature when you need a quick peanut butter fix.
Reheating
If you love a warm, gooey bar, pop a Fluffernutter Bar in the microwave for about 8-10 seconds. The marshmallow fluff will become delightfully soft, and the peanut butter will taste freshly melted.
FAQs
Can I substitute crunchy peanut butter for creamy?
Absolutely! Crunchy peanut butter will add extra texture and little peanutty surprises to every bite. Just keep in mind the bars may be a little more rustic, but no less delicious.
Do I have to use marshmallow fluff, or can I use marshmallows?
While mini marshmallows can work in a pinch, marshmallow fluff creates that signature gooey layer. If using marshmallows, cut them into small pieces and be aware the melt will be a bit different.
Can I double this recipe for a crowd?
Yes! Just double all the ingredients and use a 9×13-inch baking pan. You may need to add a few extra minutes to the bake time—keep an eye on the golden top for doneness.
Are Fluffernutter Bars gluten-free?
This recipe as written uses all-purpose flour, but you can easily swap in your favorite 1:1 gluten-free baking blend. Just ensure all other mix-ins are gluten-free as well.
Can I make Fluffernutter Bars ahead of time?
Definitely! These bars taste amazing the next day after flavors meld. They’re perfect for make-ahead dessert platters or lunchbox treats. Just store them well to maintain their gooeyness.
Final Thoughts
There’s just something about Fluffernutter Bars that makes smiles (and appetites) appear instantly. Simple, nostalgic, and deeply satisfying, these dessert bars are your ticket to delight—whether you’re baking for a crowd or just a craving. Give them a try, and don’t be surprised if they vanish faster than you expect!
Print
Fluffernutter Bars Recipe
- Total Time: 40 minutes
- Yield: 12 bars
- Diet: Vegetarian
Description
Indulge in these nostalgic Fluffernutter Bars, a delightful treat combining peanut butter, marshmallow fluff, and a chewy cookie base. Perfect for satisfying your sweet tooth!
Ingredients
Cookie Base:
1/2 cup unsalted butter (softened), 1/2 cup granulated sugar, 1/2 cup brown sugar, 1/2 cup creamy peanut butter, 1 large egg, 1 teaspoon vanilla extract, 1 cup all-purpose flour, 1/2 teaspoon baking powder, 1/4 teaspoon salt
Topping:
1 cup marshmallow fluff, 1/2 cup peanut butter chips (optional), nonstick spray or parchment for lining
Instructions
- Preheat: Preheat the oven to 350°F (175°C) and line an 8×8-inch baking pan with parchment paper or lightly grease it.
- Mix Wet Ingredients: In a large mixing bowl, cream together the butter, granulated sugar, and brown sugar. Beat in the peanut butter, then add the egg and vanilla, mixing until smooth.
- Combine Dry Ingredients: In a separate bowl, whisk together flour, baking powder, and salt. Gradually add the dry ingredients to the wet mixture until just combined.
- Assemble: Spread two-thirds of the dough into the prepared pan. Dollop the marshmallow fluff on top and spread it out. Drop the remaining dough over the fluff and lightly swirl. Add peanut butter chips if desired.
- Bake: Bake for 25–28 minutes until the top is golden. Cool before slicing into bars.
Notes
- For easier marshmallow handling, spray your spoon or spatula with nonstick spray.
- These bars store well at room temperature for up to 3 days in an airtight container.
- Prep Time: 15 minutes
- Cook Time: 25 minutes
- Category: Dessert
- Method: Baking
- Cuisine: American
Nutrition
- Serving Size: 1 bar
- Calories: 240
- Sugar: 18g
- Sodium: 140mg
- Fat: 12g
- Saturated Fat: 5g
- Unsaturated Fat: 6g
- Trans Fat: 0g
- Carbohydrates: 30g
- Fiber: 1g
- Protein: 3g
- Cholesterol: 25mg
