Fluffernutter Cookies Recipe (Peanut Butter and Marshmallow) (2024)

Fluffernutter cookies are the classic New England fluffernutter sandwich turned into a cookie and one of the most popular cookie recipes on this site! Thin, chewy peanut butter cookies are filled with swirls of marshmallow fluff. If you like these, try these fluffernutter bars or fluffernutter rice krispie treats.

Stephanie said: “I stumbled upon this recipe on Pinterest and since then, I’ve made them maybe 4 times (in less than 4 months lol) they are absolutely amazing! My husband's coworkers go bananas over them. Thank you for such an amazing cookie! ⭐⭐⭐⭐⭐“

Is fluffernutter a New England thing?

Classic fluffernutter sandwiches are a New England staple. So much so, in fact, that it's considered the unofficial sandwich of Massachusetts (and has been proposed to be the official sandwich).

Additionally, there is a festival in Somerville, Massachusetts every year called “What the Fluff?” that celebrates the sandwich's sticky and sweet goodness. AND October 8th is National Fluffernutter Day.

So… what I'm getting at, is that its popularity in New England is well-established. The fact that they don't hand you a t-shirt with a fluffernutter sandwich on it when you move here is almost shocking.

Some people are hardcore fluffernutter loyalists and seeing me do things like that makes them cringe. If you are one of those people, you may want to leave this page. Because now I've transformed fluffernutter sandwiches into a cookie and it's my new favorite thing in the entire world. As people from Massachusetts would say, they're “fluffanutta cookies”.

Peanut butter marshmallow cookies are infinitely better than the fluffernutter sandwich, sorrynotsorry.

Key Ingredients

• All-purpose flour – I've never tried it with another kind of flour, so can't speak to the results you might see with anything else. Just make sure your flour is measured properly!
• Baking soda – Baking soda, not powder! My goal was for these to be on the thinner side, and powder would puff them up more than I'd like.
• Salt – I add a little to balance out the sweetness, but if the peanut butter you're using is particularly salty, you might not need to add the extra salt.
• Unsalted butter – Room temperature butter is key here – make sure you know what room temperature butter looks like so that you're not using butter that's too cold or too melty.
• Peanut butter – Creamy peanut butter is best for this, and make sure you're giving your peanut butter a really good stir if you're using natural peanut butter with oil.
• Light brown sugar – We're only using light brown sugar, and not a combination of granulated and light or dark. This keeps the cookie from being too sweet, but still having a fully developed flavor.
• Egg – You want to lightly beat the egg before adding it to the dough. Room-temperature eggs incorporate into the dough easier than cold eggs.
• Pure vanilla bean paste or extract – This really rounds out the flavors in the cookie.
• Marshmallow Fluff – Fluff is the star of the show! I give you guidelines on how much to use, but really, measure with your heart. Just don't use too much, because then your cookies won't hold together.

Is marshmallow fluff the same as marshmallow creme?

Nope, marshmallow fluff and marshmallow creme are actually different products. Funny enough, it’s right there in the name – marshmallow creme is more creamy, and marshmallow fluff is fluffier. I very much prefer and recommend Fluff for this recipe – look for Fluff in the white container with a red lid.

How to make fluffernutter cookies

Step 1: In a medium bowl, whisk together flour, baking soda, and salt.

Step 2: In the bowl of a stand mixer (aff link) fitted with a paddle attachment, combine butter, peanut butter, and brown sugar and beat on medium speed until well combined.

Step 3: Add egg and vanilla extract.

Step 4: Beat to combine.

Step 5: Add the flour mixture to the bowl of the peanut butter mixture.

Step 6: Beat again (starting on low speed to avoid splashing the flour mixture everywhere and then increasing speed) to combine until you have a thick dough.

Step 7: Cover the bowl with plastic wrap and place in the fridge for at least 30 minutes, preferably up to 1 hour.

Step 8: Grab a medium cookie scoop (aff link) and fill it halfway with dough, pressing it into the bottom and up the sides. Make an indentation in the middle and pipe about a teaspoon of marshmallow fluff into the center of the dough.

Step 9: Top with more dough to fill the scoop.

Step 10: Place each ball of dough on the prepared baking sheet, with no more than 6 on each sheet, evenly spaced out with plenty of room for the cookies to spread.

Step 11: Bake for 8-9 minutes until the cookies have spread and started to crinkle on top. Remove from the oven and let cookies cool for at least 15 minutes on the cookie sheet itself – they will continue to spread and set a bit more as they cool.

See Also

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Step 12: Carefully move the baked cookies to wire racks (aff link) to cool completely.You'll notice they've spread a bit more and crinkled! Now grab a glass of milk and get ready to dig in.

Here's what I learned in all my trial and error:

1. The butter needs to be at room temperature. If you use cold butter, they're puffier. If you use melted butter, you end up with a thin and crispy mess.

2. They need to be 100% light brown sugar, not a combination of granulated and brown sugar. This was more of a flavor thing for me – I wanted them to be less sweet than a traditional peanut butter cookie.

3. You have to omit baking powder altogether. I tried using smaller and smaller amounts of it in the peanut butter cookie dough, but any amount seemed to cause them to puff up more than I wanted. I was afraid that completely omitting it would cause them to be flat and crispy, but my fears were unfounded! Chewy, thin cookies with crinkles on top are key.

4. I needed to use less flour than I felt made sense. I thought that 1 cup was as low as I could go, but it still didn't have the texture I wanted until I cut it down to 2/3 cup. And to be totally honest, 3/4 cup came out the same way for me so you could try that, too.

5. Chilling the dough is essential. Non-optional. Don't even think about not chilling the dough! It might even be the most important step out of all of the steps in this recipe.

6. I highly recommend doubling this recipe since it only makes 12 relatively large cookies, and they're going to be hard to part with. You know… maybe triple it. Yeah, go ahead and triple it.

7. Put the marshmallow Fluff in a piping bag to make things easier. That way, you can put some of the peanut butter dough in the cookie scoop (aff link), pipe in some of the fluff, then top it with more dough.

8. Let the cookies cool on the baking sheet. They're going to come out of the oven a bit puffy, but they will flatten and crinkle while they cool and set on the pan. After 15 minutes or so, you can move them to a wire cooling rack.

Everyone will rave about these peanut butter and fluff cookies

I brought these cookies to work a few days after I made them and while I was sitting around, I overheard one of my coworkers telling others in a meeting: “They're SO GOOD. No joke, one of the top five cookies of MY LIFE.”

And this is coming from someone who isn't much of a cookie person – she'd take a cake over a cookie any day of the week.I don't take feedback like that lightly.

If your friends are anything like mine, fluffernutter cookies are going to be in high demand after the first time you make them – so prepare yourself.

Other Recipes with Marshmallow Fluff

• If you want a marshmallow fluff dessert with a little less work, try my ooey-gooey fluffernutter rice krispie treats
• Or if you're okay with a little extra effort, these fluffernutter bars have a thick peanut butter bar base with homemade marshmallow frosting
• You could go the s'mores route with these easy s'mores cookies that are filled with fluff

FAQs

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