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Home » Recipe Index » OMG Peanut Butter Marshmallow Cookies

OMG Peanut Butter Marshmallow Cookies

August 3, 2025 by Angela

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Hello! If you’re looking for a dessert that will steal the show, look no further than OMG Peanut Butter Marshmallow Cookies. These cookies are big, soft, and loaded with toasted marshmallows, Reese’s Peanut Butter Cups, and rich chocolate. Perfect for any occasion, they bring joy to birthday parties, holiday gatherings, or simply as a sweet treat at home. The combination of flavors and textures in these cookies makes each bite an unforgettable experience!

Why You’ll Love This Recipe

  • Irresistible Flavor: The blend of peanut butter, chocolate, and marshmallows creates a deliciously rich cookie.
  • Easy to Make: With simple ingredients and straightforward steps, anyone can whip up these cookies.
  • Perfect for Sharing: This recipe yields 18 large cookies, making it ideal for parties or family gatherings.
  • Customizable: You can adjust the mix-ins to suit your preferences; add nuts or different chocolate types for variety.
  • Soft and Chewy Texture: These cookies maintain a soft interior with a slightly crisp edge, delighting every palate.

Tools and Preparation

To make OMG Peanut Butter Marshmallow Cookies effortlessly, having the right tools is essential. Here’s what you’ll need:

Essential Tools and Equipment

  • Stand mixer or hand mixer
  • Mixing bowls
  • Measuring cups and spoons
  • Cookie sheets
  • Parchment paper
  • Ice cream scoop

Importance of Each Tool

  • Stand mixer or hand mixer: Ensures thorough mixing of ingredients for a well-combined dough.
  • Parchment paper: Prevents sticking and makes for easy cleanup when baking cookies.

Ingredients

Ingredients:
– 3/4 cup unsalted butter (softened)
– 3/4 cup granulated sugar
– 1 cup brown sugar
– 1 cup peanut butter (creamy or crunchy)
– 2 large eggs
– 1 tablespoon vanilla extract
– 2 1/2 cups all-purpose flour
– 1 teaspoon baking soda
– 1/2 teaspoon salt
– 1 1/2 – 2 cups mini marshmallows
– 1 bag of Mini Reese’s Peanut Butter Cups (chopped coarsely or whole)
– 1 cup Reese’s Peanut Butter Chips
– 1 cup Ghirardelli Milk Chocolate Chips (or Semi-sweet Chocolate Chips)

How to Make OMG Peanut Butter Marshmallow Cookies

Step 1: Preheat the Oven

Preheat your oven to 350°F (175°C). This ensures your cookies bake evenly.

Step 2: Mix Wet Ingredients

In a mixing bowl, combine the softened butter, granulated sugar, brown sugar, peanut butter, eggs, and vanilla extract using your mixer until everything is well blended.

Step 3: Add Dry Ingredients

Gradually add in the all-purpose flour, baking soda, and salt. Mix until just combined; avoid overmixing to keep the texture light.

Step 4: Fold in Extras

Gently fold in the mini marshmallows, chocolate chips, peanut butter chips, and chopped Reese’s Peanut Butter Cups using a spatula. Ensure even distribution throughout the dough.

Step 5: Scoop Dough onto Cookie Sheets

Using an ice cream scoop, place large dollops of dough onto lined cookie sheets. Space them out as these will spread during baking.

Step 6: Flatten Dough Slightly

With your hand, gently flatten each scoop of dough for more uniform baking.

Step 7: Bake Cookies

Bake in your preheated oven for about 10-12 minutes. If the dough was chilled before scooping, add an extra minute or two to the baking time.

Step 8: Cool Before Serving

Remove from the oven and let cool on the baking sheet for 5-10 minutes before transferring them to a cooling rack. Patience is key; removing them too early may cause breakage.

Enjoy these delightful OMG Peanut Butter Marshmallow Cookies with friends and family!

How to Serve OMG Peanut Butter Marshmallow Cookies

These OMG Peanut Butter Marshmallow Cookies are a delightful treat that can be enjoyed in various ways. Whether for a party, family gathering, or a cozy night in, here are some serving suggestions to elevate your cookie experience.

With a Glass of Milk

  • Pairing these cookies with cold milk enhances the flavors and provides a perfect balance between the sweetness and creaminess.

S’mores Style

  • For a fun twist, roast some additional marshmallows and sandwich them between two cookies for a s’mores-inspired dessert.

Ice Cream Sandwiches

  • Use two cookies to create an ice cream sandwich. Add your favorite flavor of ice cream for a deliciously indulgent treat.

Drizzled with Chocolate

  • Melt some chocolate chips and drizzle over the cookies for added richness and visual appeal.

On a Dessert Platter

  • Arrange these cookies on a beautiful platter alongside other desserts like brownies and cupcakes for an impressive dessert spread.

Gift Them!

  • Package these cookies in a decorative box or jar. They make great gifts for friends or family during holidays or special occasions.
OMG

How to Perfect OMG Peanut Butter Marshmallow Cookies

To ensure your OMG Peanut Butter Marshmallow Cookies turn out perfectly every time, consider these helpful tips.

  • Use room temperature ingredients: Allow butter and eggs to sit at room temperature before mixing. This helps create a smoother dough.
  • Measure flour correctly: Spoon the flour into your measuring cup instead of scooping directly from the bag to avoid packing it down.
  • Don’t overmix the dough: Mix until just combined to keep your cookies soft and chewy.
  • Chill the dough (if needed): If time allows, chill the dough for about 30 minutes before baking. This helps prevent spreading.

Best Side Dishes for OMG Peanut Butter Marshmallow Cookies

These cookies are delightful on their own but can also be complemented by some tasty side dishes. Here’s a list of options that pair well with your sweet treats.

  1. Vanilla Ice Cream – A classic pairing that adds creaminess and balances the cookie’s sweetness.
  2. Fruit Salad – Fresh fruits provide a refreshing contrast to the rich flavors of the cookies.
  3. Chocolate Milkshake – This indulgent drink matches perfectly with the cookie’s peanut butter and chocolate notes.
  4. Hot Cocoa – Especially enjoyable in colder months, hot cocoa adds warmth and coziness to your dessert experience.
  5. Caramel Sauce – A drizzle of warm caramel sauce can enhance each bite, making it extra decadent.
  6. Cheese Platter – A selection of mild cheeses can offer a savory contrast that complements the sweetness of the cookies.

Common Mistakes to Avoid

Baking cookies can be tricky, especially when making OMG Peanut Butter Marshmallow Cookies. Here are some common mistakes and how to steer clear of them.

  • Skipping the cooling time: Allowing cookies to cool on the baking sheet helps them set. If you try to move them too soon, they may crumble.
  • Not measuring ingredients accurately: Use standard measuring cups and spoons. Too much flour or sugar can change the texture of your cookies.
  • Overmixing the dough: Once you add flour, mix until just combined. Overmixing can lead to tough cookies instead of soft ones.
  • Ignoring ingredient temperature: Ensure butter is softened to room temperature for better mixing and a smoother dough.
  • Using stale ingredients: Check the freshness of your baking soda and other ingredients. Stale items can affect how well your cookies rise.

Storage & Reheating Instructions

Refrigerator Storage

  • Store in an airtight container for up to 1 week.
  • Place parchment paper between layers to prevent sticking.

Freezing OMG Peanut Butter Marshmallow Cookies

  • Freeze raw cookie dough in balls for up to 3 months.
  • Wrap tightly in plastic wrap before placing in a freezer bag.

Reheating OMG Peanut Butter Marshmallow Cookies

  • Oven: Preheat oven to 350°F. Place cookies on a baking sheet and heat for about 5 minutes until warm.
  • Microwave: Heat individual cookies for about 10-15 seconds on a microwave-safe plate.
  • Stovetop: Warm a skillet over low heat and place cookies inside for a minute or two, flipping once.

Frequently Asked Questions

Here are some frequently asked questions about OMG Peanut Butter Marshmallow Cookies that can help you perfect your baking experience.

Can I use crunchy peanut butter for OMG Peanut Butter Marshmallow Cookies?

Yes! Crunchy peanut butter adds extra texture and flavor, making the cookies even more delightful.

How do I make these cookies gluten-free?

Substitute all-purpose flour with a gluten-free blend. Make sure it contains xanthan gum for best results.

What can I substitute for mini marshmallows?

You can use chopped large marshmallows or even mini chocolate chips if you prefer a chocolatey twist.

Can I add nuts to OMG Peanut Butter Marshmallow Cookies?

Absolutely! Chopped peanuts or walnuts would complement the peanut butter flavor beautifully.

How long will these cookies stay fresh?

When stored properly, they will remain fresh for about one week at room temperature or longer if refrigerated.

Final Thoughts

These OMG Peanut Butter Marshmallow Cookies are not only delicious but also versatile! You can customize them by adding different types of chocolate or even swapping out ingredients based on your preferences. Don’t hesitate to give this recipe a try; your tastebuds will thank you!

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OMG Peanut Butter Marshmallow Cookies

OMG Peanut Butter Marshmallow Cookies
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Indulge in the mouthwatering experience of OMG Peanut Butter Marshmallow Cookies! These delectable treats are a delightful combination of soft, chewy peanut butter cookies loaded with fluffy marshmallows, creamy chocolate chips, and crunchy Reese’s Peanut Butter Cups. Perfect for any occasion, whether it’s a birthday party, holiday gathering, or just a cozy night at home, these cookies promise to satisfy your sweet cravings. Each bite offers a rich explosion of flavors and textures that will leave you wanting more. With simple ingredients and easy steps, you’ll find this recipe is as fun to bake as it is to eat!

  • Author: Angela
  • Prep Time: 15 minutes
  • Cook Time: 12 minutes
  • Total Time: 27 minutes
  • Yield: Approximately 18 cookies 1x
  • Category: Dessert
  • Method: Baking
  • Cuisine: American

Ingredients

Scale
  • 3/4 cup unsalted butter (softened)
  • 3/4 cup granulated sugar
  • 1 cup brown sugar
  • 1 cup peanut butter (creamy or crunchy)
  • 2 large eggs
  • 1 tablespoon vanilla extract
  • 2 1/2 cups all-purpose flour
  • 1 teaspoon baking soda
  • 1/2 teaspoon salt
  • 1 1/2 – 2 cups mini marshmallows
  • 1 bag Mini Reese’s Peanut Butter Cups (chopped)
  • 1 cup Reese’s Peanut Butter Chips
  • 1 cup Ghirardelli Milk Chocolate Chips

Instructions

  1. Preheat your oven to 350°F (175°C).
  2. In a mixing bowl, combine softened butter, granulated sugar, brown sugar, peanut butter, eggs, and vanilla extract. Mix until smooth.
  3. Gradually add in flour, baking soda, and salt. Mix until just combined.
  4. Fold in mini marshmallows, chocolate chips, peanut butter chips, and chopped Reese's Cups.
  5. Use an ice cream scoop to drop dollops of dough onto lined cookie sheets; flatten slightly.
  6. Bake for 10-12 minutes or until golden brown. Cool on the baking sheet for 5-10 minutes before transferring to a wire rack.

Nutrition

  • Serving Size: 1 serving
  • Calories: 210
  • Sugar: 16g
  • Sodium: 150mg
  • Fat: 10g
  • Saturated Fat: 4g
  • Unsaturated Fat: 5g
  • Trans Fat: 0g
  • Carbohydrates: 29g
  • Fiber: 1g
  • Protein: 4g
  • Cholesterol: 35mg

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