Best Ever Fluffernutter Cookies Recipe

This cookie is everything you loved about a peanut butter-and-marshmallow sandwich as a kid, but baked into a chewy, slightly crackly cookie with a gooey fluffed-up center. It’s nostalgic, a little sticky, and embarrassingly addictive — perfect for dunking in milk or hiding behind your back for “just one more.” If you love peanut butter and things that are impossibly soft in the middle, this one’s for you.

We started making these because my husband, who still treats desserts like competitive eating, demanded a cookie that tasted like his childhood fluffernutter sandwiches. The first time I slid a tray out of the oven and split one open, he practically cried — true story. Our kiddo now requests these for lunchboxes and after-soccer treats, and I’ve been known to wrap one in a napkin and call it dinner on particularly chaotic nights. They’re the sort of thing that turns into a household ritual: bake a batch, hide half, and argue over whether they’re better warm or cold.

Kitchen Talk

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These cookies are delightfully forgiving but also dramatic if you ignore them. I learned the hard way that natural peanut butter makes a runnier dough and tends to flatten into sad pancakes unless you chill it; now I keep a jar of stabilized peanut butter for baking. Also, the fluff — yes, you can spoon it right into the middle, but use a small scoop or a piping bag if you want less mess and fewer gloopy fingers. Once I tried using crunchy peanut butter and the texture was fantastic, but the cookie looked like it had a personality disorder (lots of tiny holes), which my husband declared “character.”

Shopping Tips

– Baking Basics (Flour/Sugar/Leaveners): Use all-purpose flour for the classic texture and check your baking soda/powder dates — old leaveners give flat cookies.
– Fats & Oils: Real butter = best flavor; room-temperature butter creams easiest and gives you that nice rise and chew.
– Nuts & Seeds: Pick peanut butter based on texture: smooth for uniform cookies, crunchy for extra toothiness — if using natural, expect looser dough.
– Flavor Boosts: Pure vanilla and a good pinch of salt do heavy lifting here; don’t skimp on quality for those little background notes.
– Eggs: Room-temp eggs mix more evenly and help the dough come together without overworking.

Prep Ahead Ideas

– The dough is actually better after a quick chill — make it the night before and let it rest in the fridge so the flavors relax and the cookies spread less.
– Scoop dough balls onto a tray, cover, and freeze; transfer to a bag later for on-demand baking.
– Fluff keeps fine in the pantry but transfer to a small jar in the fridge if you like it less runny; store baked cookies in an airtight container between layers of parchment.
– Doing this means you can bake just a few at a time for fresh warm cookies without the whole afternoon commitment.

Time-Saving Tricks

– Use a cookie scoop to portion dough fast and uniformly — no measuring each spoonful.
– If you’re in a hurry, roll dough balls and bake straight from the fridge; they’ll just spread a touch more but still taste great.
– Line baking sheets with silicone or parchment so cleanup is immediate and you can rotate trays quickly.
– Buy a jar of marshmallow fluff instead of making your own; it’s the exact kind of shortcut that’s not cheating.

Common Mistakes

– Not chilling dough: I once baked a tray of highway-spread cookies. Chill next time and they’ll hold shape.
– Using runny natural peanut butter: dough gets greasy and brittle — swap for a stabilized or commercial creamy PB for baking.
– Overbaking: these cookies look underdone when you pull them, but they’ll finish on the tray; take them out when edges are set and middles still soft.
– Skimping on salt: peanut butter is sweet and can be flat without a pinch of salt to brighten everything up.

What to Serve It With

– A tall cold glass of milk — classic dunking vibes.
– Coffee or a latte for adults who want to sip while they nosh.
– Sliced apples or banana for a fruit-and-cookie plate.
– A scoop of vanilla ice cream if you’re making these into a dessert sandwich.

Tips & Mistakes

– Use a medium cookie scoop for even baking and consistent fluff centers.
– If dough cracks when rolling, let it warm a minute — it should be pliable, not hard.
– Add the fluff after a short bake and return for a minute to get it melty but not scorched.
– Don’t overmix once you add the flour or the cookies will get tough.

Storage Tips

Keep leftovers in an airtight container at room temperature for a few days; the marshmallow center will firm up but still be tasty. If you like them gooey, microwave a cold cookie for 7–10 seconds and watch the middle go soft and ridiculous. Cookies freeze well either baked (layered with parchment) or as raw dough balls; thaw with minimal fuss or bake straight from frozen for a minute or two longer.

Variations and Substitutions

– Peanut allergy? Sunflower seed butter + sunflower seed butter fluff (or just extra jam) mimics the flavor without the nuts.
– Want chocolate? Drop a few chocolate chips into the dough or spread a tiny smear of chocolate between two cookies for PB & Choc heaven.
– Gluten-free: a 1:1 gluten-free flour blend can work, but expect a slightly different chew.
– Vegan-ish: use vegan butter and a flax egg, but the texture will be softer and the fluff center won’t be quite the same — still delicious in a different way.

Frequently Asked Questions

Fluffernutter Cookies

Soft, peanut-buttery cookies crowned with toasty marshmallows and a whisper of flaky salt. All the nostalgic fluffernutter flavor, in a gooey-centered treat.

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Prep Time: 25 minutes minutes

Cook Time: 13 minutes minutes

Total Time: 38 minutes minutes

Servings: 24

Ingredients

 

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Cookie Dough

• ▢ 1 2/3 cups all-purpose flour
• ▢ 3/4 teaspoon baking soda
• ▢ 1/2 teaspoon baking powder
• ▢ 1/2 teaspoon fine sea salt
• ▢ 1/2 cup unsalted butter, softened
• ▢ 1 cup creamy peanut butter
• ▢ 2/3 cup packed brown sugar
• ▢ 1/3 cup granulated sugar
• ▢ 2 teaspoons honey
• ▢ 1 large egg
• ▢ 1 egg yolk
• ▢ 2 tablespoons milk
• ▢ 1 1/2 teaspoons vanilla extract

Finish

• ▢ 24 regular marshmallows (not mini or jumbo)
• ▢ 1/2 teaspoon flaky sea salt, for sprinkling

Instructions

Preparation Steps

• Line two baking sheets with parchment. Set oven to 340°F (170°C). Pop the marshmallows into the freezer to firm up while you make the dough; this slows their melting.
• In a medium bowl, whisk together the flour, baking soda, baking powder, and fine sea salt until evenly combined.
• In a large bowl with a hand mixer (or stand mixer), beat the softened butter, creamy peanut butter, and honey on medium-high until fluffy, about 2 minutes.
• Add the brown sugar and granulated sugar and beat 1 minute more. Mix in the egg and egg yolk just until smooth, then blend in the milk and vanilla on low speed.
• Add the dry ingredients to the bowl and mix on low until the flour is just incorporated. Cover and let the dough rest for 15 minutes to hydrate; it will thicken slightly and scoop more cleanly.
• Scoop heaping tablespoonfuls (about 1 1/2 tablespoons each) onto the prepared sheets, spacing 2 inches apart. Gently press each mound to about 3/4-inch thick. Par-bake for 6 minutes to set the edges.
• Remove the pans from the oven. Working quickly, press one cold marshmallow into the center of each cookie. Return to the oven and bake 6 to 7 minutes more, until the edges are set and the marshmallows show light golden spots.
• Cool on the baking sheet for 8 to 10 minutes to firm up, then transfer to a rack. While still warm, finish with a tiny pinch of flaky sea salt on each cookie.

Notes

Tip: If the dough feels sticky, lightly oil your cookie scoop or chill the dough for an extra 10 minutes. Store cooled cookies airtight at room temperature for up to 3 days; the marshmallow centers stay soft.

This recipe is an original creation inspired by classic Fluffernutter Cookies flavors. All ingredient ratios and instructions are independently developed.