Fluffernutter Cookies (peanut butter + fluff cookies) are soft and chewy peanut butter cookies filled with marshmallow fluff for a sweet and ooey gooey treat! Be sure to check out more of my delicious cookie recipes, too!

Fluffernutter Cookies on a White Counter From Overhead. Baking, Cookies, Cookie Recipes, Peanut Butter Cookies, Peanut Butter Marshmallow Cookies, Marshmallow Fluff, Cookie Exchange, Dessert, Easy Cookies, i am baker, iambaker
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Fluffernutter Cookies

Remember the fluffernutter sandwich? It is peanut butter and marshmallow creme between two slices of white bread. Well, these fluffernutter cookies have all the deliciousness of the sandwich, but in a baked cookie! The recipe starts with a super soft peanut butter cookie that is filled with marshmallow fluff. I also have Fluffernutter Bars and Fluffernutter Rice Krispie Bars with the same delicious flavors! And, if you love peanut butter treats like I do, check out my Reese’s Pieces Peanut Butter Cookies, too.

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Cookies Ingredients

Peanut Butter: I prefer creamy peanut butter, but you could also use crunchy.

Cornstarch: Cornstarch is added to the cookies for a light and tender texture.

Marshmallow Fluff: Marshmallow Fluff is actually a specific brand of marshmallow creme, which you can whip up at home. If you want store-bought and can’t find marshmallow fluff where you are, look for marshmallow creme. It could also be labeled as marshmallow paste or marshmallow spread.

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What is a Fluffernutter?

As I stated above, a fluffernutter is peanut butter and marshmallow sandwich. It was made popular by Emma Curtis during World War I. She published the peanut butter and marshmallow creme sandwich and called it the ‘Liberty Sandwich.’ A few years later, the Curtis family developed a recipe for marshmallow fluff and included the sandwich recipe on the label. It wasn’t until 1960 that the sandwich was called a fluffernutter, for marketing purposes.

Can I Use Marshmallows Instead of Marshmallow Fluff?

Sure! I did test these cookies with marshmallows in the center, in place of marshmallow fluff, and that can work if that is all you have on hand. If using marshmallows, add 4-5 miniature marshmallows to the center of each cookie before baking.

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How to Store Fluffernutter Cookies

Once baked, store the cookies in an airtight container at room temperature. They will last up to 5 days. If you freeze the cookies, let them cool completely before storing them in a freezer-safe container for up to 3 months.

If you assemble the dough and then freeze before baking, flash-freeze the dough balls until solid; then, store them in a freezer-safe container.

More Peanut Butter Cookies

Fluffernutter Cookies on a White Counter From Overhead. Baking, Cookies, Cookie Recipes, Peanut Butter Cookies, Peanut Butter Marshmallow Cookies, Marshmallow Fluff, Cookie Exchange, Dessert, Easy Cookies, i am baker, iambaker
4.91 from 32 votes

Fluffernutter Cookies

Prep Time 15 minutes
Cook Time 12 minutes
Total Time 27 minutes
Fluffernutter Cookies (peanut butter + fluff cookies) are soft and chewy peanut butter cookies filled with marshmallow fluff for a sweet and ooey gooey treat!

Ingredients

  • ½ cup (129 g) creamy peanut butter
  • ½ cup (1 stick / 113 g) unsalted butter, room temperature
  • 1 cup (200 g) light brown sugar, packed
  • 1 large egg, room temperature
  • 1 teaspoon vanilla extract
  • cups (187.5 g) all-purpose flour
  • 1 teaspoon cornstarch
  • ½ teaspoon kosher salt
  • 1 cup marshmallow fluff, or marshmallow creme

Instructions

  • Preheat the oven to 350°F and line two large baking sheets with parchment paper.
  • In a large bowl, add peanut butter, butter, and brown sugar. Using a hand mixer, combine the mixture until smooth and creamy, about 2-3 minutes.
  • Scrape down the sides of the bowl. Add egg and vanilla and mix until combined (about 30 seconds).
  • Add in flour, cornstarch, and salt.
  • With the mixer on low, incorporate the ingredients until just combined (30 seconds-1 minute).
  • Using a 2-tablespoon cookie scoop, drop dough onto the lined baking sheets. Using your hand, flatten each dough ball into a flat disk shape about 3-inches across.
  • Using two spoons (this will keep your hands from getting sticky), add about 1 tablespoon of marshmallow fluff to the center of each disk of dough. (You can also add the fluff to a piping bag and pipe dollops onto each dough disk.)
  • Bring the dough up around the marshmallow fluff, completely covering the fluff and forming a ball. Place on the lined baking sheets.
  • Bake the cookies for 10-12 minutes, or until the edges are brown. Watch the cookies carefully so that the marshmallow does not burn.
  • Let the cookies rest for 10-15 minutes before serving.

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Meet Amanda Rettke

Amanda Rettke is the creator of I Am Baker, and the bestselling author of Surprise Inside Cakes: Amazing Cakes for Every Occasion – With a Little Something Extra Inside.Over the course of her 15+ year blogging adventure, she has been featured in and collaborated with the Food Network, New York Times, LA Times, Country Living Magazine, People Magazine, Epicurious, Brides, Romantic Homes, life:beautiful, Publishers Weekly, The Daily Mail, Star Tribune, The Globe and Mail, DailyCandy, YumSugar, The Knot, The Kitchn, and Parade, to name a few.

Reader Comments

    1. How to Store Fluffernutter Cookies
      Once baked, store the cookies in an airtight container at room temperature. They will last up to 5 days. If you freeze the cookies, let them cool completely before storing them in a freezer-safe container for up to 3 months.
      If you assemble the dough and then freeze before baking, flash-freeze the dough balls until solid; then, store them in a freezer-safe container.

  1. I just made these with organic peanut butter (just peanuts and salt) and fresh milled soft white wheat and they were absolutely delicious. I followed the directions exactly except, I didn’t have marshmallow fluff so I used regular marshmallows. I cut them up into four flat discs, put two discs per cookie. Then I flattened out more dough and put it on top and pressed the edges together. So, basically, I made a cookie & marshmallow sandwich. They came out beautifully. Not as pretty as if I used the fluff but I was very happy with the results. Everyone just loved them. Great recipe! So glad I made them.

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