As the aroma of nutty brown butter wafts through the kitchen, my heart skips a beat, knowing that deliciousness is just a bake away. Today, I’m excited to share my take on Brown Butter Marshmallow Crispy Cookies, a delightful homage to that popular treat from Costco. These crowd-pleasers fuse the crispy texture of rice cereal with gooey marshmallows, all enveloped in a rich, caramel-like dough that melts in your mouth. With no chilling time needed and a straightforward recipe, you’re just moments away from a batch that will ignite nostalgia and satisfy those sweet cravings. They’re not only quick to prepare but also a joy to share with family and friends. Who wouldn’t want cookies that capture the spirit of comfort and fun? Ready to create some magic in your kitchen? Let’s dive in!

Why Are These Cookies So Irresistible?
Uniqueness: These Brown Butter Marshmallow Crispy Cookies stand out with their rich, caramel-like flavor from brown butter. Quick Preparation: With no chilling time required, they’re ready in minutes, making them perfect for spontaneous cravings. Texture Contrast: The blend of crispy rice cereal and gooey marshmallows creates a delightful crunch paired with chewiness. Crowd-Pleasing Treat: Great for parties or school lunches, everyone will adore this nostalgic treat. Customization Options: Feel free to experiment by adding chocolate chips or flavor extracts to personalize your batch. For a fun twist, try these delectable Chocolate Oat Cookies or explore the flavors of Crispy Baked Eggplant alongside your cookie adventure!
Marshmallow Crispy Cookies Ingredients
• To create your own batch of these delightful Marshmallow Crispy Cookies, gather the following ingredients:
For the Cookie Dough
- Salted Butter – Brings richness and flavor; you can also use unsalted butter, just adjust salt to taste.
- Brown Sugar – Adds moisture and a delicious caramel flavor; no direct substitution recommended.
- Granulated Sugar – Sweetens the dough for a perfect cookie texture; consider coconut sugar as a lower GI alternative.
- Egg – Binds the ingredients together and provides moisture; for a vegan option, replace it with a flax egg.
- Vanilla – Enhances the overall flavor; vanilla paste can provide an even bolder taste.
- Baking Soda – Acts as a leavening agent for a slightly risen cookie; avoid substitutions.
- Salt – Balances out the sweetness; you might want to reduce it if using salted butter.
- All-Purpose Flour – Provides essential structure; substitute with a 1:1 gluten-free flour blend if needed.
For the Crunch
- Rice Krispie Cereal – Delivers that perfect crunch; you can use Kellogg’s Rice Krispies or a gluten-free alternative.
- Mini Marshmallows – Infuses your cookies with chewiness and sweetness; for variations, swap them out for chocolate chips.
For the Finish
- Flaked Salt – Adds an irresistible flavor boost when sprinkled on top; it’s optional but highly recommended for that sweet-salty contrast.
Now that you’ve got your ingredients lined up, you’re ready to mix, bake, and indulge in these wonderfully nostalgic Marshmallow Crispy Cookies!
Step‑by‑Step Instructions for Brown Butter Marshmallow Crispy Cookies
Step 1: Preheat and Prepare
Start by preheating your oven to 350°F (175°C). While the oven warms up, line a baking sheet with parchment paper, which will ensure easy cleanup and prevent the cookies from sticking. This is the perfect time to gather your ingredients, so everything is ready to create your delicious Brown Butter Marshmallow Crispy Cookies.
Step 2: Brown the Butter
In a medium saucepan, melt the salted butter over medium heat, stirring constantly. Watch closely as it transforms into a beautiful golden color and develops a nutty aroma, which should take about 5-7 minutes. Once browned, remove it from the heat and let it cool for a few minutes before using it in the cookie dough, adding depth of flavor to your recipe.
Step 3: Mix Sugars and Butter
In a large mixing bowl, combine the cooled brown butter with both brown and granulated sugars. Use an electric mixer or a whisk to blend them together until smooth and creamy. This should take about 2-3 minutes, and you’ll notice the mixture lightening in color as the sugars dissolve, creating a rich base for your Marshmallow Crispy Cookies.
Step 4: Incorporate Egg and Vanilla
Next, add one egg and a splash of vanilla extract to the butter-sugar mixture. Mix on medium speed until fully integrated, which should take about 1-2 minutes. The batter will become even creamier and fragrant; this combination will enhance the overall flavor of your cookies, setting the stage for that irresistible chewy texture.
Step 5: Combine Dry Ingredients
Gradually add in the baking soda, salt, and all-purpose flour to the wet ingredients. Mix gently until just combined, being careful not to overmix as this can affect the texture. The dough should appear somewhat thick and sticky—this is what you want for your Brown Butter Marshmallow Crispy Cookies!
Step 6: Fold in Crunch and Sweetness
Now, fold in the Rice Krispie cereal and mini marshmallows using a spatula. Take your time with this step to ensure the marshmallows and cereal are evenly distributed without crushing them. You’ll want to see those delightful bursts of gooey marshmallow and crunchy cereal throughout your cookie dough, contributing to the chewy and crispy elements.
Step 7: Scoop and Space the Dough
Using a large cookie scoop or spoon, drop generous balls of cookie dough onto the prepared baking sheet. Be sure to leave about 2 inches of space between each dough ball, as they will spread when baking. This is crucial for achieving the perfect texture in your Brow Butter Marshmallow Crispy Cookies—chewy centers and slightly crisp edges.
Step 8: Bake to Perfection
Place the baking sheet in your preheated oven and bake for 10-13 minutes. Keep an eye on them, and look for lightly golden edges while the centers remain slightly underbaked and chewy. This contrast is what makes these cookies so special; the delightful aroma filling your kitchen will be hard to resist!
Step 9: Cool and Finish
Once baked, remove the cookies from the oven and immediately sprinkle flaked salt over the tops for an extra burst of flavor. Allow them to cool on the baking sheet for about 5 minutes before transferring to a wire rack. This will help them set perfectly, letting you enjoy the melty marshmallow goodness in your Brown Butter Marshmallow Crispy Cookies.

What to Serve with Brown Butter Marshmallow Crispy Cookies
The delightful, chewy goodness of these cookies deserves a spread of scrumptious pairings to elevate your dessert experience.
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Rich Hot Chocolate: A velvety mug of hot chocolate enhances the sweetness while providing a comforting warmth, making it the perfect complement to these cookies.
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Fresh Fruit Salad: Bright, juicy fruits add a refreshing contrast to the cookies’ sweetness, balancing the flavors and offering a burst of freshness in every bite.
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Vanilla Ice Cream: Creamy vanilla ice cream is the ultimate treat to pile on top of these chewy cookies, creating a classic cookie à la mode that your family will adore.
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Spiced Chai Latte: The warm spices of chai embrace the rich flavors of the cookies, bringing an aromatic touch that makes for a cozy pairing.
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Chocolate-Dipped Strawberries: The combination of fresh strawberries and silky chocolate brings a sophisticated twist to the table, enhancing both visual appeal and flavor.
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Milkshake: A thick, creamy milkshake pairs delightfully with the crunchy texture of the cookies, creating a nostalgic dessert moment everyone will love.
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Caramel Sauce Drizzle: A warm drizzle of caramel sauce over these cookies elevates their indulgence factor to new heights, enhancing that rich, buttery flavor.
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Lemon Bars: The zesty brightness of lemon bars offers a perfect tangy contrast to the sweet, chewy cookies, making for an exciting, well-rounded dessert menu.
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Coffee: A bold cup of coffee rounds out the sweetness of the cookies, making this an ideal pairing for your afternoon pick-me-up or cozy evening chat.
How to Store and Freeze Marshmallow Crispy Cookies
Room Temperature: Store the cookies in an airtight container at room temperature for up to 3 days to maintain their chewy texture and flavor.
Fridge: If you prefer a longer shelf life, you can store them in the fridge for up to a week. Just ensure they are in a sealed container to prevent drying out.
Freezer: Freeze the cookies in a single layer in an airtight container or freezer bag for up to 2-3 months. Separate layers with parchment paper to avoid sticking.
Reheating: When you’re ready to indulge, reheat cookies in the microwave for about 10-15 seconds for a warm, freshly baked taste, bringing back that delightful marshmallow goodness!
Marshmallow Crispy Cookies Variations
Feel free to get creative with these Marshmallow Crispy Cookies and tailor them to your taste buds!
- Dairy-Free: Substitute coconut oil for butter and use almond milk in place of the egg for a dairy-free delight.
- Chocolate Lover’s Dream: Fold in semi-sweet or dark chocolate chips for an indulgent twist. These chocolate-marshmallow cookies are impossible to resist!
- Gluten-Free: Swap all-purpose flour with a 1:1 gluten-free flour blend and use gluten-free Rice Krispies. Perfect for gluten-sensitive friends!
- Nutty Addition: Mix in chopped nuts, like pecans or walnuts, for added crunch and flavor. The combination of nuts and marshmallows is a match made in heaven.
- Flavorful Extracts: Experiment with flavored extracts, such as maple or almond, instead of vanilla for a unique flavor profile. Each variation brings its own charm!
- Spicy Kick: Add a pinch of cayenne pepper or cinnamon to the dough for a surprising hint of spice. It’s a subtle yet delightful twist!
- Chewy Chocolate Swirl: Combine marshmallows and chocolate chips for a gooey chocolate-marshmallow experience. These cookies will bring smiles all around.
- Top with Fun: Once cooled, drizzle melted chocolate on top and sprinkle crushed nuts or sprinkles for an extra festive touch. Perfect for parties or celebrations!
For even more cookie inspiration, try whipping up these irresistible Chocolate Oat Cookies or pair them with some crispy bites like Crispy Chicken Sandwich. Happy baking!
Make Ahead Options
These Brown Butter Marshmallow Crispy Cookies are perfect for meal prep, allowing you to enjoy homemade treats with minimal last-minute effort. You can prepare the cookie dough up to 3 days in advance, storing it in an airtight container in the refrigerator to maintain its freshness. If you’re short on time, you can also scoop the dough balls onto the baking sheet and freeze them for up to 2 months. When you’re ready to bake, simply place the frozen dough balls directly on the baking sheet and add 2-3 extra minutes to the baking time. This way, you’ll get the same delicious, chewy cookies that everyone loves—just as scrumptious as if they had been made fresh today!
Expert Tips for Marshmallow Crispy Cookies
• Butter Care: Watch your brown butter closely, as it can quickly turn from perfectly nutty to burnt. Stir frequently for best results.
• Mixing Method: Avoid overmixing once you add flour. Stop mixing as soon as combined to keep those Marshmallow Crispy Cookies tender and soft.
• Chilling Option: If you prefer thicker cookies, consider chilling the dough for an hour. This helps maintain a nice structure as they bake.
• Spacing Matters: Make sure to space your cookie dough balls adequately on the baking sheet. They spread, so give them about 2 inches to breathe!
• Flavor Kick: For an extra flavor boost, try adding a dash of almond or maple extract. It personalizes your Marshmallow Crispy Cookies beautifully!

Brown Butter Marshmallow Crispy Cookies Recipe FAQs
What type of butter should I use?
I recommend using salted butter for richness and flavor. If you prefer unsalted butter, just remember to adjust the amount of salt in your recipe accordingly to maintain that delicious balance.
How should I store my cookies?
Store your Marshmallow Crispy Cookies in an airtight container at room temperature for up to 3 days. This keeps them fresh and chewy. For longer storage, place them in the refrigerator where they can last for up to a week, just make sure they are sealed well to avoid drying out.
Can I freeze these cookies? How do I do it?
Absolutely! To freeze your beloved Marshmallow Crispy Cookies, place them in a single layer in an airtight container or a freezer bag, separating layers with parchment paper to prevent sticking. They’ll stay fresh in the freezer for up to 2-3 months. When you’re ready to enjoy them again, simply reheat in the microwave for 10-15 seconds to restore that gooey marshmallow goodness!
What if my cookies spread too much while baking?
If you find your cookies spreading too much, it may be due to the butter being too warm. Make sure to cool the brown butter before mixing it with the sugars. Additionally, ensure your flour is measured correctly—too little can lead to overly flat cookies. If desired, chilling the dough for about an hour before baking can help prevent excessive spreading, resulting in a thicker cookie.
Can I use chocolate chips instead of marshmallows?
Definitely! Swapping out mini marshmallows for chocolate chips is a delightful variation that many enjoy. Alternatively, you can use a mix of both for a wonderfully sweet and chewy cookie experience. Just remember to keep the overall ratio consistent to maintain the texture!
Are these cookies suitable for gluten-free diets?
Yes, you can easily adapt these Marshmallow Crispy Cookies to be gluten-free by substituting the all-purpose flour with a 1:1 gluten-free flour blend. This way, everyone can enjoy these delicious cookies without compromising on taste!

Marshmallow Crispy Cookies: A Chewy Delight You’ll Love
Ingredients
Equipment
Method
- Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper.
- Melt the salted butter in a medium saucepan over medium heat until it turns golden and develops a nutty aroma (about 5-7 minutes). Let cool.
- In a large bowl, combine the cooled brown butter with brown and granulated sugars, mixing until smooth and creamy (2-3 minutes).
- Add the egg and vanilla to the sugar mixture, mixing until well integrated (1-2 minutes).
- Gradually mix in the baking soda, salt, and all-purpose flour until just combined. Do not overmix.
- Fold in the Rice Krispie cereal and mini marshmallows gently using a spatula until evenly distributed.
- Using a large scoop, drop cookie dough balls onto the prepared baking sheet, leaving 2 inches of space between each.
- Bake for 10-13 minutes until lightly golden at the edges and slightly underbaked in the center.
- Remove from the oven and sprinkle flaked salt on top. Cool on the baking sheet for 5 minutes before transferring to a wire rack.

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