Fluffernutter Cookies (Peanut Butter Cookies with Marshmallow Filling) Recipe

I absolutely love sharing this Fluffernutter Cookies (Peanut Butter Cookies with Marshmallow Filling) Recipe because it brings together two nostalgic favorites in one irresistibly gooey treat. These cookies have the perfect combination of soft, peanut buttery dough with a sweet, melty marshmallow center that oozes warmth with every bite. When I make them, I’m always amazed at how such simple ingredients come together to create something so special and satisfying.

Why You’ll Love This Fluffernutter Cookies (Peanut Butter Cookies with Marshmallow Filling) Recipe

What really gets me about this Fluffernutter Cookies (Peanut Butter Cookies with Marshmallow Filling) Recipe is the incredible balance of flavors and textures. The peanut butter provides a rich, nutty depth while the marshmallow filling adds a luscious, gooey surprise. Each bite feels cozy and indulgent, kind of like a hug in cookie form. It’s that sweet and salty dance I always crave, with a soft chew that keeps me coming back for more.

Besides tasting amazing, these cookies are also surprisingly easy to make. I love how the recipe lets you prepare the marshmallow fluff ahead of time so it’s perfectly firm for baking. You don’t need any fancy equipment — just simple ingredients and a bit of patience while freezing the fluff. Whether I’m baking for a crowd or just for my own sweet tooth, these cookies never fail to impress. They’re perfect for family gatherings, holiday treat trays, or even a cozy night in with a warm drink.

Ingredients You’ll Need

A top view of several white bowls and a white plate arranged on a white marbled surface, each containing a different baking ingredient. From top left to bottom right, there is a bowl with brown sugar, a bowl with light brown sugar, a bowl with light brown peanut butter that has a smooth texture, a bowl with white sugar, a bowl with an egg, a bowl with baking soda and baking powder powder, a small bowl with vanilla extract dark brown liquid, a bowl with fluffy white marshmallow fluff, a small bowl with white salt, a white bowl filled with white flour, and a white plate holding a rectangular piece of pale yellow butter. Each bowl and plate is spaced neatly in an organized manner, showing a clear view of all ingredients. Photo taken with an iphone --ar 4:5 --v 7

These ingredients might look straightforward, but each one plays a crucial role in making the flavor and texture of these cookies so delightful. From the crispness of the sugars to the softness of the butter, every component works beautifully together.

Marshmallow fluff: The star of the filling, providing that irresistible gooey center when frozen before baking.
Salted butter: Adds richness and a perfect buttery base for the dough, softened for easy mixing.

Creamy peanut butter: Gives the cookies their classic nutty flavor and tender texture.
Granulated sugar: Helps create a slight crunch and sweetness in the cookie’s exterior.
Brown sugar: Adds moisture and a subtle caramel undertone that deepens the flavor.

Egg: Binds the ingredients and adds some lift to the cookie dough.
Vanilla extract: Enhances all the sweet flavors with a warm aromatic note.
All-purpose flour: Provides structure to the cookies, measured carefully for perfect dough consistency.

Baking powder: Helps the cookies rise just enough to stay tender but not too puffy.
Baking soda: Works alongside the powder to create a chewy texture with great spread.
Kosher salt: Balances the sweetness and enhances the peanut butter’s natural flavors.

Directions

Step 1: About two hours before you plan to bake, separate the marshmallow fluff into 12 equal dollops on parchment paper—each about 2 teaspoons. Pop them in the freezer so they firm up nicely, which is crucial to keeping that gooey center contained as you bake.

Step 2: When the marshmallow fluff is almost ready (about two hours later), go ahead and preheat your oven to 350 degrees Fahrenheit. Line two baking sheets with parchment paper to keep things neat and ensure even baking.

Step 3: In a mixing bowl, combine the softened butter, peanut butter, granulated sugar, and brown sugar. I like using an electric hand mixer for this part because it quickly creates a smooth, even mixture. Then, add the egg and vanilla extract and mix again until everything is fully incorporated.

Step 4: Now, add the all-purpose flour, baking powder, baking soda, and kosher salt to your wet ingredients. Mix these in until you have a smooth cookie dough that holds together but isn’t too stiff.

Step 5: Scoop out 3 tablespoons of dough at a time until you have 12 portions. Place 6 dough balls evenly spaced on each baking sheet. Before the marshmallow fluff melts, flatten each dough ball gently into a disk. This step is important to wrap the filling easily without it melting too fast.

Step 6: Take the marshmallow fluff dollops straight from the freezer and place one in the center of each cookie disk. Carefully wrap the dough around the fluff and re-form it into a ball, making sure the marshmallow is completely covered.

Step 7: Place each cookie ball seam-side up on the baking sheet. This helps prevent marshmallow overflow during baking, though a little puffing out is actually a sign of delicious gooeyness!

Step 8: Bake the cookies in your preheated oven for 12 to 14 minutes. They should be lightly golden but still soft to the touch. Take them out and let them cool on the baking sheet for a few minutes before transferring to a wire rack to cool completely.

Servings and Timing

This recipe makes 12 generous cookies, perfect for sharing or savoring over a few days. Prep time is around 15 minutes plus the two-hour freezing time for the marshmallow dollops, which you can use to get other things ready or just relax. The cookies bake quickly in about 12 to 14 minutes, so total active cooking time is short even though the overall time stretches because of chilling. Cooling after baking takes about 20 minutes to let the flavors settle and the texture perfect.

How to Serve This Fluffernutter Cookies (Peanut Butter Cookies with Marshmallow Filling) Recipe

A clear glass bowl containing four different layers placed on a white marbled surface: the bottom layer is white granulated sugar, on top of it is light brown soft sugar, then a square slab of pale yellow butter sits angled, and on top of everything is a dollop of smooth, light brown peanut butter with soft folds. Photo taken with an iphone --ar 4:5 --v 7

I love serving these cookies warm or at room temperature so the marshmallow center stays soft and gooey. They make a fantastic treat alongside a glass of cold milk, which is a classic pairing I can never get enough of. For a grown-up twist, try them with a cup of coffee or even a nutty dessert wine like a tawny port, which complements the peanut flavors beautifully.

For a little extra flair when serving, you can dust the tops lightly with powdered sugar or drizzle some melted chocolate over them once cooled. If you’re hosting a party or holiday gathering, arranging these cookies on a platter with fresh berries or a few salted nuts adds a lovely contrast and elevates the presentation. I like to portion them in small groups of two or three — they’re rich and satisfying, so a couple per person is usually perfect.

These cookies really shine at casual celebrations, family dinners, or as an indulgent afternoon pick-me-up. I sometimes pack a couple in a lunchbox for a fun surprise. Serving them slightly chilled gives the marshmallow center a firmer texture, which some folks prefer, so feel free to experiment with the serving temperature that suits you best.

Variations

I enjoy experimenting with this Fluffernutter Cookies (Peanut Butter Cookies with Marshmallow Filling) Recipe by swapping ingredients to suit different tastes or dietary needs. For example, using natural peanut butter instead of creamy processed peanut butter adds a more rustic texture and deep nuttiness that I find delightful. You can also try using crunchy peanut butter if you want a bit of extra crunch in your cookies.

If you’re looking to make these cookies gluten-free, swapping the all-purpose flour for a 1:1 gluten-free baking flour blend works perfectly and doesn’t compromise the texture. For a vegan twist, I’ve had good results replacing the butter with coconut oil or vegan butter and using a flax egg instead of a regular egg. The marshmallow fluff can be swapped for vegan marshmallow spread to keep that melty center.

Flavor-wise, you might try adding a sprinkle of cinnamon or a pinch of chili powder into the dough for an exciting twist. Some days I even add mini chocolate chips to the dough or a swirl of chocolate inside along with the marshmallow for a double-layer surprise. Baking these as thumbprint cookies with marshmallow as the filling or shaping them into bars before baking are fun variations that bring different textures and shapes to your Fluffernutter experience.

Storage and Reheating

Storing Leftovers

I always store leftover cookies in an airtight container at room temperature. They keep well for up to 3 to 4 days while still maintaining that soft texture and gooey marshmallow center. If you don’t have an airtight container, wrapping them tightly in plastic wrap can also do the trick to keep them fresh and prevent drying out.

Freezing

These cookies freeze wonderfully, which is perfect for making ahead or saving extras. I wrap each cooled cookie individually in plastic wrap before placing them in a freezer-safe zip-top bag or container. They can keep well frozen for up to 2 months. When I’m ready to enjoy them, I thaw the cookies at room temperature or gently warm them in the oven to bring back that fresh-baked gooeyness.

Reheating

To reheat, I gently warm the cookies in a 300-degree Fahrenheit oven for about 5 minutes, which helps restore the marshmallow’s melty texture without drying out the cookie. Microwaving works too for a quick fix, but I recommend short bursts of 10 to 15 seconds to avoid overheating and turning the marshmallow chewy. Avoid reheating too long or at too high a temperature, or you risk losing the delightful creaminess the marshmallow brings.

FAQs

Can I use natural peanut butter instead of creamy peanut butter?

Yes! You can use natural peanut butter, but keep in mind that it may make your dough a bit more crumbly due to less stabilizers and oil separation. You might need to chill the dough slightly before shaping to handle it better. The flavor will be more robust and wholesome, which many people prefer.

What if I don’t have marshmallow fluff? Can I use regular marshmallows instead?

While marshmallow fluff is best for its spreadable, creamy consistency, you can chop mini marshmallows finely and use them, but the texture and baking behavior will differ. The marshmallows may melt and spread within the cookie more unevenly, so keep an eye on baking time to avoid excess overflow.

Can I make these cookies ahead of time and bake later?

Absolutely! You can prepare the dough, shape it around the frozen marshmallow dollops, and freeze the raw cookie balls until ready to bake. When baking from frozen, just add a minute or two extra to the baking time. This makes them a convenient option for spontaneous cravings or when hosting.

Are these cookies soft or crunchy?

These cookies are meant to be soft with a chewy edge and a luscious, gooey marshmallow center. If you prefer crunchier cookies, you can bake a minute or two longer, but I recommend enjoying them as intended to fully appreciate the marshmallow filling.

Can I add chocolate chips or other mix-ins to the dough?

Definitely! Adding mini chocolate chips, chopped nuts, or even a sprinkle of sea salt on top before baking can elevate the cookies further. Just keep the proportions balanced so the marshmallow center remains the star.

Conclusion

I truly hope you give this Fluffernutter Cookies (Peanut Butter Cookies with Marshmallow Filling) Recipe a try because it has quickly become one of my all-time favorites to bake and share. The way the familiar flavors of peanut butter and marshmallow come together in such a fun, melty cookie is pure magic. Whether you’re baking for loved ones or treating yourself, these cookies bring a wonderful sense of comfort and joy. Happy baking!