Fluffernutter Cookie Sandwiches Recipe

Sarah Grossett | The Gold Lining Girl

Fluffernutter Cookie Sandwiches give you the classic combination of peanut butter and marshmallow. You'll love the marshmallow...

Fluffernutter Cookie Sandwiches Photo

One of the first times I ever met my in-laws, they were hosting us for dinner. My S.O.’s step-father was challenging me on my baking skills, being the ball-buster that he is. He asked me what I could make right on the spot.

Okay, that’s a difficult task. How many recipes do you know off the top of your head, start-to-finish? And that take minimal ingredients? If you ever find yourself in a similar predicament, which I can’t imagine would happen, but still, these easy 3-ingredient peanut butter cookies are what you make.

They are what I made, and everyone was thoroughly impressed! The dough takes about 2 minutes to whip up, and these are the most peanut-buttery peanut butter cookie you can find.

Fluffernutter Cookie Sandwiches Picture

When I wanted to make Fluffernutter cookie sandwiches, I knew what peanut butter cookie recipe I was going to use. It’s a no-brainer. I mixed up the standard cookie recipe, but doubled it. This recipes makes 18 large cookie sandwiches!

I slathered one bottom of a cookie with a heaping tablespoonful of peanut butter, and covered the bottom of a second cookie with marshmallow frosting. Put them together, and you’ve got super delicious marshmallow and peanut butter Fluffernutter cookie sandwiches. I love anything fluffernutter!

Let’s talk about the marshmallow frosting. It’s what my Grandma always uses to fill two cake mix chocolate cookies to make her own homemade version of Oreos. Her homemade Oreos are amazing. We love them, and grew up on them.

Fluffernutter Cookie Sandwiches Image

However, fair warning that the marshmallow frosting is just kind of a pain to make. You know how marshmallow fluff runs and sticks to everything. In this recipe, you beat it in the mixer with powdered sugar to get it thick enough that it won’t run.

You actually want it to be almost like a dough – you can roll it into balls, and press it into the center of the cookie sandwich. Working with sticky and gooey marshmallow fluff, and getting it to that point in stiffness, it takes some elbow grease, just so you know that going in.

Also, I don’t really recommend eating the marshmallow frosting on its own. It’s not the best by itself. In the middle of two cookies though, it’s absolutely perfect. Especially in this recipe because we pair it with plain peanut butter as the filling for the cookies, and the saccharine marshmallow frosting is a nice balance to the much-less-sweet peanut butter.

Fluffernutter Cookie Sandwiches Pic

I know I’m underselling the marshmallow frosting, but it’s beyond perfect for these cookie sandwiches. We’ve been making it for homemade Oreo filling for years! Just know that it takes elbow grease to mix it up, and that it doesn’t taste great on its own. It needs to be in the middle of a cookie, but then it’s perfection!

As are these Fluffernutter cookie sandwiches, featuring one of my favorite pairings – peanut butter and marshmallow!

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Fluffernutter Cookie Sandwiches Recipe

    18 Servings


For the Cookies:
  • 2 cups Creamy Peanut Butter
  • 2 cups Granulated Sugar, Plus 2 tablespoons, divided
  • 2 Eggs
For the Filling:
  • 2 7 ounce jars Marshmallow Fluff
  • 1 1/2-2 cups Powdered Sugar
  • 1 cup Creamy Peanut Butter


  1. Preheat oven to 350°F.
  2. In a large bowl, combine 2 cup creamy peanut butter, 2 cup sugar, and eggs.
  3. Drop by tablespoonful onto well-greased baking sheets.
  4. Sprinkle with remaining sugar, and lightly press a criss-cross pattern with a fork.
  5. Bake for 8-10 minutes, or until edges are golden brown, and centers are set.
  6. Allow to cool on baking sheets for 1-2 minutes before transferring to a wire rack to cool completely.
  7. Meanwhile, in a large mixing bowl, beat the marshmallow fluff, slowly adding powdered sugar, until the mixture is ultra-thick, and can be formed into balls. The mixer will struggle towards the end, and you may need to add powdered sugar by hand – it will take elbow grease. Add enough powdered sugar that you can form the dough into large 1-inch balls. You want it thick enough that the marshmallow fluff won’t be runny.
  8. Press the ball of marshmallow frosting onto the bottom of one cookie.
  9. Spread the bottom of another cookie with about 1 tablespoon peanut butter.
  10. Smash the cookies together to form cookie sandwiches.
  11. Repeat with remaining cookies. Enjoy!


Cooking Method:
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Related Recipes:
Peanut Butter Recipes, Marshmallow Recipes, Cookie Recipes, Dessert Recipes, Snack Recipes, Family Meals and Snack Recipes, Baking Recipes, Baked Recipes, Frosting Recipes, Easy Recipes
Recipe Yields:
18 cookie sandwiches
Prep Time:
Cook Time:
Total Time:
Related Post:
Author: Sarah Grossett
Recipe Yields: 18 cookie sandwiches
Prep Time: 20 minutes
Cook Time: 30 minutes
Total Time: 50 minutes

Nutrition Facts

Serving Size 1 cookie sandwich
Servings Per Recipe 18

Amount Per Serving
Calories from Fat 178
Calories 457

% Daily Value*
Total Fat 22g
  Saturated Fat 5g
Sodium 18mg
Total Carbohydrate 58g
  Dietary Fiber 0g
  Sugars 46g
Protein 11g

* Percent Daily Value are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.
** Nutrition Facts are estimated based on ingredients and data provided by Fat Secret. Please consult a doctor if you have special dietary needs.
Sarah Grossett

About Sarah

Sarah has an affinity for shiny golden objects, hence the name of her blog: The Gold Lining Girl. Peanut Butter's the one thing she'd take to a desert island, so it's only right that she's our Peanut Butter Fanatic!

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