This Peanut Butter Marshmallow Cookie Recipe brings together nutty, chewy peanut butter cookies with gooey, melted marshmallows. It’s a classic flavor combination that delivers an irresistible sweet and savory bite. These cookies are perfect for any occasion, offering a delightful texture and comforting taste that everyone will adore.

Recipe Overview
| Prep Time | 20 minutes |
|---|---|
| Cook Time | 10-12 minutes |
| Total Time | 30-35 minutes |
| Servings | 24 cookies |
| Difficulty | Easy |
| Cuisine | American Baking |
Why This Recipe Works
I’ve tested countless variations of peanut butter cookies, and this specific recipe truly hits the mark. The balance of creamy peanut butter with just the right amount of brown sugar creates a wonderfully tender and chewy cookie base. It’s durable enough to hold the melted marshmallow center without becoming too dense or dry. The direct addition of marshmallows into the dough ensures they distribute evenly and create those signature gooey pockets.
The magic truly lies in the interplay of textures and flavors. The slight saltiness of the peanut butter perfectly complements the intense sweetness of the marshmallows. When baked, the edges of the cookie crisp up delightfully while the center remains soft and chewy, encasing molten marshmallow goodness. It’s a simple concept executed perfectly, resulting in a cookie that’s both nostalgic and exciting with every bite.
Ingredients
| Ingredient | Quantity | Notes |
|---|---|---|
| All-Purpose Flour | 2 ¼ cups | Sifted for a lighter texture. |
| Baking Soda | 1 teaspoon | Essential for leavening and spread. |
| Salt | ½ teaspoon | Enhances all flavors, especially peanut butter. |
| Unsalted Butter, softened | 1 cup (2 sticks) | Room temperature is crucial for creaming. |
| Creamy Peanut Butter | 1 cup | Use commercial brands like Skippy or Jif for best results; natural peanut butter can affect texture. |
| Granulated Sugar | ¾ cup | Contributes to sweetness and structure. |
| Brown Sugar, packed | ¾ cup | Adds moisture, chewiness, and a caramel note. |
| Large Eggs | 2 | Room temperature eggs incorporate better. |
| Vanilla Extract | 1 teaspoon | Pure vanilla extract is recommended for optimal flavor. |
| Mini Marshmallows | 1 ½ cups | Do not substitute with jumbo marshmallows; they won’t melt as evenly. Ensure they are fresh. |
Step-by-Step Instructions
Prep and Preheat
- Preheat your oven to 350°F (175°C).
- Line baking sheets with parchment paper or silicone baking mats.
Combine Dry Ingredients
- In a medium bowl, whisk together the sifted flour, baking soda, and salt. Set aside.
Cream Butter and Sugars
- In a large bowl, beat the softened unsalted butter until creamy using an electric mixer.
- Add the granulated sugar and packed brown sugar to the butter.
- Cream the butter and sugars together until light and fluffy, about 2-3 minutes.
Incorporate Wet Ingredients
- Beat in the creamy peanut butter until well combined with the sugar mixture.
- Add the eggs one at a time, beating well after each addition until fully incorporated.
- Stir in the vanilla extract until just combined.
Combine Wet and Dry Mixtures
- Gradually add the dry ingredient mixture to the wet ingredients.
- Mix on low speed or by hand until just combined. Do not overmix the dough at this stage.
Add Marshmallows
- Gently fold in the mini marshmallows using a spatula until they are evenly distributed throughout the dough.
Form and Bake Cookies
- Drop rounded tablespoons of dough onto the prepared baking sheets, about 2 inches apart.
- Bake for 10-12 minutes, or until the edges are golden brown and the centers appear set but still slightly soft.
- Allow the cookies to cool on the baking sheets for 5 minutes before transferring them to a wire rack to cool completely.
Chef Tips for Perfect Results
- Ensure your butter and eggs are at room temperature for optimal creaming and emulsification, leading to a consistently textured cookie dough.
- Use commercially processed creamy peanut butter. Natural peanut butters have a different oil separation and moisture content which can result in cookies that spread too much or become crumbly.
- Do not overmix the dough once the flour is added. Overmixing develops gluten, resulting in tough, dense cookies instead of tender, chewy ones.
- Bake one sheet at a time for even heat distribution. Rotate the baking sheet halfway through the baking cycle if your oven has hot spots.
- Measure flour accurately by spooning it into the measuring cup and leveling it off with a straight edge. Avoid scooping directly from the bag, as this compacts the flour and can lead to dry cookies.
Common Mistakes to Avoid
- Overbaking: Cookies continue to bake on the hot sheet after removal from the oven. Pull them out when the edges are golden and the centers look slightly underdone for a chewy texture.
- Incorrect Peanut Butter: Using natural or crunchy peanut butter can significantly alter the cookie’s structure and texture. Stick to creamy, commercial varieties for this specific recipe’s intended outcome.
- Hot Baking Sheets: Placing dough onto hot baking sheets from previous batches can cause the cookies to spread too much and bake unevenly. Always start with a cool, prepared sheet.
- Skipping Parchment Paper: While not strictly about taste, parchment paper prevents sticking and makes cleanup much easier. Direct contact with the baking sheet can sometimes lead to over-browning on the bottom.
Variations and Substitutions
| Ingredient | Substitution | Impact on Flavor |
|---|---|---|
| All-Purpose Flour | Gluten-Free Blend (1:1 ratio) | May result in a slightly different texture; a blend with xanthan gum is best. |
| Creamy Peanut Butter | Almond Butter or Sunflower Seed Butter | Almonds offer a sweeter, milder nut flavor. Sunflower seed butter provides a distinct, earthy taste. |
| Vanilla Extract | Almond Extract (½ tsp) | Adds a stronger, more pronounced nutty flavor complementing the peanut butter. |
| Mini Marshmallows | White Chocolate Chips | Adds a creamy sweetness that melts into pockets, similar to marshmallows but with a distinct chocolate flavor. |
Serving Suggestions and Pairings
These Peanut Butter Marshmallow Cookies are best served slightly warm, allowing the marshmallow swirls to be extra gooey. They pair exceptionally well with a tall glass of cold milk, a classic combination that balances the sweet and salty flavors. For a more indulgent treat, serve them alongside a scoop of vanilla bean ice cream. They are perfect for bake sales, school lunches, holiday gatherings, or simply as an afternoon pick-me-up with your favorite hot beverage like coffee or tea.
Storage and Reheating
| Method | Duration | Instructions |
|---|---|---|
| Airtight Container (Room Temp) | 3-5 days | Store completely cooled cookies in a single layer in an airtight container to prevent them from becoming soggy. |
| Freezing (Unbaked Dough) | 2-3 months | Form dough balls, place on a baking sheet, freeze until firm, then transfer to a freezer bag. Bake from frozen, adding 1-2 minutes to the baking time. |
| Reheating (Individual Cookie) | Seconds | Microwave on a microwave-safe plate for 10-15 seconds to gently warm the marshmallow for a fresh-baked feel. |
Nutritional Information
Approximate values per serving (1 cookie):
| Nutrient | Amount per Serving |
|---|---|
| Calories | 200-250 kcal |
| Protein | 4g |
| Fat | 12g |
| Carbohydrates | 27g |
| Fiber | 1g |
| Sugar | 15g |
| Sodium | 100mg |
Frequently Asked Questions
Can I use crunchy peanut butter?
Crunchy peanut butter can be used, but it will alter the smooth texture of the cookie. You will have small pieces of peanuts throughout, and the overall chewiness might be slightly reduced due to the varying moisture content.
How do I know when the cookies are done?
The cookies are done when the edges appear golden brown and set. The centers should look slightly soft and underbaked; they will continue to cook on the hot baking sheet after removal from the oven.
My marshmallows melted completely, what happened?
This can happen if the marshmallows are very fresh and soft, or if the dough is overbaked. Fresh mini marshmallows tend to melt more readily. Ensure you are not overbaking the cookies and consider using slightly older, firmer mini marshmallows if this is a recurring issue.
Can I make the dough ahead of time?
Yes, the cookie dough can be made ahead and refrigerated for up to 3 days. Store it in an airtight container. Allow it to soften slightly at room temperature for about 15-20 minutes before scooping and baking.
What is the best way to serve these cookies?
Serve these cookies warm from the oven for the gooiest marshmallow centers. They are excellent with a glass of cold milk or a hot drink. A dusting of powdered sugar can add an extra touch of sweetness if desired, complementing the peanut butter and marshmallow profile.
Conclusion
This Peanut Butter Marshmallow Cookie Recipe offers a truly delightful baking experience and an even more delightful treat. The chewy, nutty base perfectly cradles pockets of melted marshmallow, creating a satisfying contrast. Mastering this recipe ensures you have a go-to for any occasion, embodying comfort and pure deliciousness. Enjoy the signature blend of peanut butter and marshmallow that makes these cookies unforgettable.

Peanut Butter Marshmallow Cookie Perfection
Ingredients
Method
- Preheat your oven to 350°F (175°C). Line baking sheets with parchment paper.
- In a medium bowl, whisk together the sifted all-purpose flour, baking soda, and salt. Set aside.
- In a large bowl, cream together the softened unsalted butter, creamy peanut butter, granulated sugar, and packed brown sugar until light and fluffy.
- Beat in the room temperature eggs one at a time, then stir in the vanilla extract.
- Gradually add the dry ingredients to the wet ingredients, mixing until just combined. Be careful not to overmix.
- Gently fold in the marshmallows until evenly distributed throughout the dough. The dough might seem a little sticky.
- Drop rounded tablespoons of dough onto the prepared baking sheets, about 2 inches apart.
- Bake for 10-12 minutes, or until the edges are golden brown and the centers are still slightly soft.
- Let the cookies cool on the baking sheets for a few minutes before transferring them to a wire rack to cool completely. The marshmallows will set as they cool.
Notes
If you don't have mini marshmallows, cut regular-sized marshmallows into quarters.
Store cookies in an airtight container at room temperature for up to 3 days for optimal freshness.