Name: Fluffernutter Cookies Recipe
Prep time: 15 min
Cook time: 10 min
Total time: 25 min
Cuisine: American
Ingredients: 1/2 cup butter (room temperature); 1/2 cup creamy peanut butter; 1/2 cup granulated sugar; 1/2 cup light brown sugar; 1 large egg; 1 1/2 teaspoons vanilla extract; 1 cup all-purpose flour; 1/2 teaspoon baking powder; 1/2 teaspoon baking soda; 1 teaspoon cornstarch; 1/2 teaspoon kosher salt; 3/4 cup marshmallow fluff; 3/4 cup peanut butter chips

Jump to Recipe·5.3 from 11 reviews

If there’s a cookie that instantly transports you back to the pure joy of childhood, it has to be Fluffernutter Cookies. These treats mash up the classic combo of peanut butter and marshmallow in a way that’s gooey, blissfully sweet, and just the right amount of nostalgic. Every bite is loaded with rich peanut butter flavor, sweet pockets of marshmallow fluff, and a sprinkle of peanut butter chips for triple the delight. Whether you’re baking for a party or just treating yourself, Fluffernutter Cookies are guaranteed to bring big smiles all around.

Fluffernutter Cookies Recipe - Recipe Image

Ingredients You’ll Need

The beauty of Fluffernutter Cookies lies in their simplicity and the magical way each ingredient plays a part. From the rich peanut butter to that irresistible marshmallow center, every component is essential for the perfect flavor, chewiness, and signature look.

Butter (room temperature): Adds richness and keeps these cookies wonderfully soft and tender.
Creamy peanut butter: The star flavor that brings that salty, nutty goodness to every bite.
Granulated sugar: Helps create a beautiful golden edge and just the right amount of sweetness.
Light brown sugar: Gives a hint of caramel flavor and extra chewiness.
Large egg: Binds everything together while adding moisture.
Vanilla extract: Enhances all the flavors and brings warmth to the dough.
All-purpose flour: Lays the foundation and gives the cookies their structure.
Baking powder: Adds a gentle lift for a slightly puffed cookie.
Baking soda: Gives just the right spread and helps with texture.
Cornstarch: The secret weapon for incredible softness and that melt-in-your-mouth bite.
Kosher salt: Balances out the sweetness and intensifies flavors throughout.
Marshmallow fluff: Sweet and gooey, this is what makes these cookies so iconic and swoon-worthy.
Peanut butter chips: Little pops of peanut butter flavor that add visual appeal and extra decadence.

How to Make Fluffernutter Cookies

Step 1: Prep Your Baking Sheets

Start by preheating your oven to 350°F for that perfect bake. Line two large baking sheets with parchment paper so your Fluffernutter Cookies lift off with gorgeous golden bottoms and zero mess. A quick little prep moment can make all the difference later!

Step 2: Cream Butter, Peanut Butter, and Sugars

Grab a large mixing bowl and combine the butter, creamy peanut butter, granulated sugar, and light brown sugar. With a hand mixer, whip everything until it’s luxuriously smooth and creamy—about 2 to 3 minutes. This step ensures your cookies have the best texture and flavor base.

Step 3: Add Egg and Vanilla

Crack in your egg and pour in that vanilla extract. Beat just until everything’s combined, keeping the batter fluffy and ready for the next step, but making sure not to overmix.

Step 4: Mix in Dry Ingredients

Sprinkle in the flour, baking powder, baking soda, cornstarch, and kosher salt. Mix on low until you have a dough that looks soft, cohesive, and a little sticky. Don’t be tempted to overmix—the goal is tender, melt-in-your-mouth Fluffernutter Cookies!

Step 5: Shape the Dough

Using a 2-tablespoon cookie scoop, drop balls of dough onto your prepared baking sheets. Gently flatten each one into a 3-inch wide disk. This makes the perfect “nest” for your marshmallow center to snuggle into.

Step 6: Add Marshmallow Fluff

Scoop a generous tablespoon of marshmallow fluff and drop it in the center of each dough disk. Don’t worry if it’s sticky—messy hands mean more fun (and tastier cookies) ahead!

Step 7: Seal and Roll

Carefully bring the edges of each dough circle up and around that gooey marshmallow fluff, pinching and rolling so it’s completely enclosed. You should have a neat dough ball that’s hiding a sweet surprise inside.

Step 8: Set Up the Baking Sheet

Nestle each stuffed dough ball back onto the lined baking sheets. Give them a little space so they don’t bake into each other and so the marshmallow has room to work its magic.

Step 9: Top with Peanut Butter Chips

Just before baking, press a few peanut butter chips into the tops of each dough ball. This is your golden ticket to picture-perfect, bakery-style Fluffernutter Cookies with a mouthwatering finish.

Step 10: Bake to Perfection

Bake in the preheated oven for 9 to 10 minutes, or until you see those beautiful golden-brown edges. The centers will still look a little soft—that means they’ll be extra gooey once cool.

Step 11: Cool and Enjoy

Remove your cookies from the oven and let them cool completely on a wire rack. The marshmallow will set and the cookies will firm up just enough to hold that amazing, soft-in-the-center texture we all love.

How to Serve Fluffernutter Cookies

Garnishes

For an extra-special touch, dust your Fluffernutter Cookies with a touch of powdered sugar or drizzle with a little melted chocolate. If you’re feeling playful, sprinkle some flaky sea salt on top right after baking for a savory contrast that makes the sweet flavors sing.

Side Dishes

These cookies pair fantastically with an ice-cold glass of milk or a creamy vanilla milkshake. If you want to go fully nostalgic, serve alongside a mug of hot cocoa for a cozy, comforting treat that brings everyone to the table.

Creative Ways to Present

Don’t be afraid to get a little whimsical! Stack your cookies tall on a gorgeous serving platter, or gift-wrap a batch with colorful ribbon for the ultimate homemade surprise. For parties, arrange them on a tiered cake stand with mini peanut butter cups or marshmallows scattered around for a themed, irresistible display.

Make Ahead and Storage

Storing Leftovers

Keep any leftover Fluffernutter Cookies in an airtight container at room temperature, and they’ll stay soft and fresh for up to four days. To preserve that signature gooey middle, add a slice of white bread to the container—it’ll help maintain their moisture.

Freezing

Want to bake ahead? Fluffernutter Cookies freeze like a dream! Arrange completely cooled cookies in a single layer on a baking sheet, freeze until firm, then transfer to a freezer bag. They’ll keep beautifully for up to two months—just thaw at room temperature any time cravings strike.

Reheating

To revive that just-baked flavor, pop a cookie in the microwave for 10 to 12 seconds before serving. The marshmallow gets deliciously melty again and makes every bite taste straight from the oven.

FAQs

Can I use crunchy peanut butter in Fluffernutter Cookies?

Absolutely! Crunchy peanut butter adds a lovely little texture and nutty bite to your cookies. Just expect slightly chunkier dough and a bit more rustic look—equally delicious.

Is it possible to make these gluten-free?

Yes, just swap the all-purpose flour for your favorite one-to-one gluten-free baking blend. The cookies may spread a little differently, but you’ll still get all that peanut butter-marshmallow magic.

Can I substitute marshmallows for the marshmallow fluff?

For best results, stick with marshmallow fluff—it melts into the perfect gooey center! Regular marshmallows can release too much moisture and might not stay put in the middle as they bake.

Do I have to chill the dough?

No chilling required for Fluffernutter Cookies! The dough holds its shape well right after mixing, making this a speedy treat for impatient cookie lovers (which, honestly, is all of us).

How do I prevent the marshmallow from leaking out?

The secret is to make sure the marshmallow fluff is completely wrapped in dough, pinching any seams closed before baking. A little peek of fluff is part of the charm, though, so don’t stress if some escapes—it still tastes incredible!

Final Thoughts

There’s something truly magical about sharing a batch of Fluffernutter Cookies, whether it’s a throwback to childhood or a brand-new obsession. I hope you jump into your kitchen and give this fabulous, fun recipe a try soon—it’s a sweet adventure worth every bite!