Fluffernutter Protein Cookies [dairy-free + gluten-free]

These soft, fluffy Fluffernutter protein cookies are packed with peanut butter flavor and a gooey marshmallow center. An easy high-protein treat!

Fluffernutter Protein Cookies

If you love the classic combination of peanut butter and marshmallow, you need to try these fluffernutter protein cookies! These soft and fluffy protein cookies have a delicious peanut butter flavor and a gooey marshmallow center that makes them taste like a fun twist on the nostalgic fluffernutter.

Made with protein powder, oat flour, peanut powder, egg whites, and applesauce, these cookies are an easy protein-packed treat that comes together with simple ingredients. They’re perfect when you’re craving something sweet but still want a little extra protein.

What Is a Fluffernutter?

A fluffernutter is a classic American combination of peanut butter and marshmallow creme. It’s traditionally enjoyed as a sandwich, but the combination also makes an amazing flavor for cookies and other desserts.

These fluffernutter protein cookies put a protein-packed spin on the classic flavor. Instead of marshmallow creme, they have pieces of vanilla marshmallows baked right into the center of each cookie for a gooey, melty filling.

Why You’ll Love These Fluffernutter Protein Cookies

These cookies are:

• Soft and fluffy
• Light and tender
• Packed with peanut butter flavor
• Filled with gooey marshmallow
• Protein-packed
• Easy to make
• Made with oat flour
• Perfect for a snack or dessert
• A fun twist on the classic fluffernutter flavor

Ingredients You’ll Need

• Liquid Egg Whites: Egg whites provide structure and extra protein while helping create the light, fluffy texture of these cookies.
• Peanut Butter Vegan Protein: Peanut butter protein powder gives these cookies their signature peanut butter flavor while adding protein. Code HEALTHYHELPER saves!
• Oat Flour: Oat flour creates a soft, tender texture and works well in these protein cookies.
• Peanut Powder: Peanut powder adds even more peanut butter flavor to the cookie dough. Code HEALTHYHELPER saves!
• Baking Powder: Baking powder helps the cookies puff up as they bake, giving them their soft and fluffy texture.
• Granulated Monk Fruit Sweetener: Monk fruit sweetener adds sweetness to the cookie dough.
• Applesauce: Applesauce adds moisture and helps keep the cookies soft and tender.
• Vanilla Protein Marshmallows: Marshmallows create the gooey center that gives these cookies their signature fluffernutter-inspired flavor. Code HEALTHYHELPER saves!

How To Make Fluffernutter Protein Cookies

1. Start by adding the protein powder, oat flour, peanut powder, baking powder, and monk fruit sweetener to a large bowl. Mix the dry ingredients well to break up any clumps.
2. Add the liquid egg whites and applesauce to the bowl. Mix everything together until a thick cookie dough forms.
3. Refrigerate the dough for 30–60 minutes. Chilling the dough allows it to firm up, which makes it much easier to shape the cookies and helps them hold their shape while baking.
4. Once the dough has chilled, preheat your oven to 350°F. Line a baking sheet with parchment paper.
5. Place half of the dough into four portions on the prepared baking sheet and shape each portion into a circle.
6. Slice the marshmallows into smaller pieces and place 3–4 slices on top of each cookie.
7. Top the marshmallows with the remaining cookie dough, making sure the marshmallow pieces are covered and enclosed inside the cookies.
8. Bake at 350°F for 10 minutes.
9. Remove the cookies from the oven and let them cool for about 15 minutes. They’ll firm up slightly as they cool while staying soft and fluffy with a gooey marshmallow center.

Tips For Making The Best Protein Cookies

Chill the Dough: Don’t skip the refrigeration step. Chilling the dough makes it easier to handle and helps the cookies maintain their shape while baking.

Enclose the Marshmallow: Make sure the marshmallow pieces are completely covered with cookie dough. This helps keep the gooey filling inside the cookies as they bake.

Don’t Overbake: These cookies only need 10 minutes in the oven. Overbaking can take away from their soft, fluffy texture.

Let Them Cool: The cookies will be very soft when they first come out of the oven. Give them about 15 minutes to cool and firm up slightly before enjoying.

How To Store Fluffernutter Protein Cookies

Store leftover cookies in an airtight container at room temperature for up to 2 days. You can also refrigerate them for up to 5 days.

If you refrigerate the cookies, let them sit at room temperature for a few minutes before eating for the best texture.

Can I Use A Different Protein Powder?

I recommend using a peanut butter-flavored vegan protein powder for the best flavor and texture. Different protein powders absorb liquid differently, so substituting another type of protein powder may change the consistency of the dough.

Can I Use Regular Flour Instead Of Oat Flour?

Oat flour is recommended for this recipe because it helps create the soft, fluffy texture of these cookies. If you use a different flour, you may need to adjust the amount of liquid.

Can I Make These Without Marshmallows?

Absolutely! You can leave out the marshmallows if you prefer a simple peanut butter protein cookie. However, the marshmallow center is what gives these cookies their signature fluffernutter-inspired flavor.

More Protein Cookie Recipes To Try

If you love easy protein-packed cookies and desserts, try some of these next:

• Sleepy Time Chocolate Chip Protein Cookies
• Copycat Crumbl Chocolate Chip Cookies
• High-Protein No-Bake Chocolate Peanut Butter Bars
• Vegan Chai Spiced Protein Sugar Cookies

Talk soon,