Easy Soft and Chewy Fluffernutter Cookies – Peanut Butter Marshmallow Treat

Soft and Chewy Fluffernutter Cookies are the ultimate peanut butter dessert made with creamy peanut butter, sweet brown sugar, peanut butter chips, and gooey marshmallow swirls baked into soft, chewy cookie centers. These easy soft and chewy fluffernutter cookies are perfect for quick desserts, holiday baking, party treats, after-school snacks, and cozy homemade cookie cravings. Every bite delivers rich peanut butter flavor, melty marshmallow pockets, and a bakery-style soft texture that stays tender and chewy long after baking. If you love easy cookie recipes, peanut butter desserts, marshmallow treats, or nostalgic homemade baking ideas, these cookies are the perfect combination of comfort, sweetness, and irresistible texture. Warm from the oven or stored for later, they bring classic fluffernutter flavor into a soft, chewy cookie everyone will love.

Introduction

There’s something nostalgic and comforting about the combination of peanut butter and marshmallow. It’s a classic flavor pairing that instantly brings back childhood memories of simple, sweet treats. These Soft and Chewy Fluffernutter Cookies take that beloved combination and transform it into a bakery-style cookie that is rich, soft, and full of gooey texture in every bite.

Unlike traditional peanut butter cookies, these have an extra layer of indulgence thanks to marshmallow swirls and peanut butter chips folded into a soft, buttery dough. The result is a cookie that is chewy in the center, slightly crisp at the edges, and filled with pockets of creamy sweetness that melt as you bite into them.

These cookies are perfect for just about any occasion. Whether you are baking for holidays, sharing treats with friends, packing lunchbox desserts, or simply craving something sweet and homemade, they come together easily and deliver consistent results every time. The dough is simple, beginner-friendly, and made with pantry staples, making this recipe accessible even for new bakers.

What makes these Soft and Chewy Fluffernutter Cookies truly special is their texture. The combination of cornstarch, brown sugar, and peanut butter creates a soft, tender crumb, while marshmallow swirls bring gooey pockets of sweetness throughout. Each cookie feels rich, satisfying, and perfectly balanced between chewy and creamy.

Why You’ll Love This Recipe

• Soft, chewy texture with gooey marshmallow swirls
• Rich peanut butter flavor in every bite
• Easy, beginner-friendly cookie recipe
• Perfect for parties, holidays, or everyday treats
• Bakery-style cookies made with simple pantry ingredients
• Freezer-friendly dough for make-ahead baking

Ingredients Breakdown

Yield

24 cookies

Main Ingredients

• 2 ¼ cups all-purpose flour
• 1 teaspoon baking soda
• ½ teaspoon baking powder
• ½ teaspoon salt
• 1 tablespoon cornstarch
• ¾ cup unsalted butter, softened
• ¾ cup creamy peanut butter
• ¾ cup light brown sugar, packed
• ½ cup granulated sugar
• 2 large eggs
• 2 teaspoons vanilla extract
• 1 cup peanut butter chips
• 1 cup mini marshmallows or marshmallow fluff
• Extra peanut butter chips for topping
• Flaky sea salt for garnish (optional)

Ingredient Highlights

Peanut Butter

Peanut butter is the heart of these cookies, adding richness, creaminess, and deep nutty flavor that defines the fluffernutter profile.

Brown Sugar

Brown sugar helps create soft, chewy centers while adding subtle caramel notes that enhance the peanut butter flavor.

Cornstarch

Cornstarch is key for achieving a soft bakery-style texture, keeping the cookies tender instead of dense.

Marshmallows or Marshmallow Fluff

Marshmallows create gooey pockets of sweetness, while marshmallow fluff blends into the dough for a swirl of creamy texture.

Peanut Butter Chips

Peanut butter chips add extra bursts of sweetness and intensify the peanut butter flavor throughout the cookies.

Tools & Equipment Needed

Essential Kitchen Tools

• Large mixing bowl
• Medium mixing bowl
• Hand mixer or stand mixer
• Baking sheets
• Parchment paper
• Cookie scoop or spoon
• Whisk
• Spatula

Optional Helpful Tools

• Cooling rack
• Silicone baking mat
• Kitchen scale for precise measurements
• Airtight storage container
• Ice cream scoop for uniform cookies

Step-by-Step Instructions

1. Preheat the Oven

Preheat the oven to 350°F (175°C) and line baking sheets with parchment paper. This ensures even baking and prevents sticking.

2. Mix Dry Ingredients

In a medium bowl, whisk together:

• 2 ¼ cups all-purpose flour
• 1 teaspoon baking soda
• ½ teaspoon baking powder
• ½ teaspoon salt
• 1 tablespoon cornstarch

Whisk until fully combined and set aside.

3. Cream Butter and Sugars

In a large mixing bowl, beat together:

• ¾ cup unsalted butter, softened
• ¾ cup creamy peanut butter
• ¾ cup light brown sugar, packed
• ½ cup granulated sugar

Beat until light, fluffy, and smooth in texture.

4. Add Eggs and Vanilla

Add:

• 2 large eggs
• 2 teaspoons vanilla extract

Mix well after each egg until fully incorporated.

5. Combine Wet and Dry Ingredients

Gradually add the dry mixture into the wet ingredients. Mix until just combined. Avoid overmixing to keep cookies soft and tender.

6. Fold in Mix-Ins

Gently fold in:

• 1 cup peanut butter chips
• 1 cup mini marshmallows or marshmallow fluff

Swirl lightly so marshmallow distributes throughout the dough without fully blending.

7. Chill the Dough

Cover the dough and chill for at least 30 minutes. This step helps the cookies stay thick, soft, and chewy while baking.

8. Shape the Cookies

Scoop dough onto prepared baking sheets, spacing cookies about 2 inches apart. Add extra peanut butter chips on top for a bakery-style finish.

9. Bake the Cookies

Bake for 10 to 13 minutes until:

• Edges are lightly golden
• Centers are soft and slightly underbaked

The cookies will continue setting as they cool.

10. Cool the Cookies

Let cookies cool on the baking sheet for 5 minutes before transferring to a wire rack. This helps them set while staying soft inside.

11. Serve or Store

Serve warm for gooey marshmallow texture or store in an airtight container once fully cooled.

Tips & Variations

Extra Gooey Version

Use marshmallow fluff instead of mini marshmallows for a softer, melt-in-your-mouth texture.

Gluten-Free Option

Use a 1:1 gluten-free flour blend in place of all-purpose flour.

Dairy-Free Option

Replace butter with plant-based butter and ensure peanut butter chips are dairy-free.

Chocolate Peanut Butter Twist

Add chocolate chips for a richer dessert variation.

Salted Cookie Finish

Sprinkle flaky sea salt on top for a sweet-salty balance.

Flavor Profile

These Soft and Chewy Fluffernutter Cookies are rich, nutty, sweet, and irresistibly soft. The peanut butter provides a deep, creamy base flavor while brown sugar adds caramel-like sweetness. Marshmallow swirls create gooey pockets that melt into the cookie, adding light sweetness and softness.

The texture is what makes these cookies unforgettable. The edges are lightly crisp, while the centers stay soft, chewy, and tender. Peanut butter chips melt slightly during baking, adding extra richness and bursts of nutty sweetness.

Every bite delivers a perfect balance of creamy peanut butter, soft marshmallow, and buttery cookie dough.

Nutritional Overview

Estimated Per Cookie

• Calories: 210
• Protein: 4g
• Carbohydrates: 26g
• Fat: 11g
• Fiber: 1g

Dietary Notes

• Vegetarian-friendly
• Can be adapted for dairy-free diets
• Freezer-friendly cookie dough option
• Contains peanuts

Make-Ahead & Meal Prep Tips

These cookies are perfect for preparing ahead of time.

Chill Dough in Advance

The dough can be chilled up to 24 hours before baking for deeper flavor.

Freeze Cookie Dough

Scoop dough into portions and freeze for fresh-baked cookies anytime.

Storage Tips

Store baked cookies in an airtight container at room temperature for several days.

Reheating Tips

Warm cookies slightly before serving to restore gooey marshmallow texture.

FAQs

Why did my cookies turn out dry?

Overbaking is the most common cause. Remove cookies when centers still look soft.

Can I skip chilling the dough?

You can, but chilling helps create thicker, chewier cookies.

Can I use natural peanut butter?

Yes, but texture may vary depending on oil separation.

How do I keep marshmallows from melting too much?

Use mini marshmallows and avoid overbaking for best results.

Can I freeze baked cookies?

Yes, they freeze well and maintain their soft texture after thawing.

Cooking Timeline

Task	Time
Prep Time	20 minutes
Chill Time	30 minutes
Cook Time	10–13 minutes
Total Time	32 minutes
Yield	24 cookies

Serving Suggestions

These cookies are best served slightly warm so the marshmallow stays soft and gooey. Arrange them on a platter for parties, bake sales, or holiday dessert tables for a visually inviting treat.

They pair beautifully with milk or coffee-based desserts and make excellent lunchbox treats or afternoon snacks. A light sprinkle of flaky sea salt on top makes them look bakery-style and enhances flavor.

Recipe Variations

Chocolate Fluffernutter Cookies

Add chocolate chips for a rich peanut butter chocolate combination.

Extra Soft Bakery Cookies

Slightly underbake for ultra-soft centers.

Marshmallow Swirl Cookies

Increase marshmallow fluff for more gooey ribbons.

Crunchy Peanut Butter Version

Add chopped peanuts for texture contrast.

Ingredient Spotlight

Peanut Butter

Peanut butter gives these cookies their signature richness and nutty depth. It creates a soft, chewy structure while enhancing flavor throughout the dough.

Marshmallow

Marshmallow adds sweetness and creates gooey pockets that melt into the cookie, giving it the classic fluffernutter experience.

Pro Cooking Tips

Don’t Overmix

Mix just until combined to keep cookies soft and tender.

Watch Baking Time Closely

Slight underbaking ensures chewy centers.

Chill for Thickness

Chilling prevents spreading and improves texture.

Add Chips on Top

Pressing extra peanut butter chips on top creates bakery-style presentation.

Cool Properly

Let cookies rest on the baking sheet before moving them to maintain structure.

Storage & Freezing Guide

Room Temperature

Store in an airtight container for several days.

Freezer Storage

Freeze baked cookies or dough balls for longer storage.

Reheating Instructions

Warm briefly in the microwave or oven for fresh-baked texture.

What Not to Do

Avoid sealing warm cookies, as moisture can make them soggy.

Nutrition Estimate Table (Per Cookie)

Nutrient	Amount
Calories	210
Protein	4g
Carbs	26g
Fat	11g
Fiber	1g
Sugar	17g
Sodium	135mg
Saturated Fat	5g

Dietary Notes

• Vegetarian-friendly
• Contains peanuts
• Freezer-friendly
• Can be adapted dairy-free

Expanded Conclusion

These Soft and Chewy Fluffernutter Cookies are everything a homemade cookie should be: soft, rich, nostalgic, and packed with flavor in every bite. The combination of creamy peanut butter, sweet brown sugar, and gooey marshmallow creates a cookie that feels both comforting and indulgent.

They’re easy enough for everyday baking yet special enough for holidays, parties, and gift boxes. Whether enjoyed warm from the oven or saved for later, they stay soft, chewy, and satisfying.

Save this recipe for your next baking day and enjoy the perfect blend of peanut butter richness and marshmallow sweetness in every Soft and Chewy Fluffernutter Cookie.

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