Name: Brown Butter Marshmallow Crispy Cookies Recipe
Prep time: 25 min
Cook time: 15 min
Total time: 1 h 45 min
Cuisine: American
Ingredients: 1 cup (16 Tbsp; 226g) unsalted butter, cut into 16 pieces; 3/4 cup (150g) packed light or dark brown sugar; 1/2 cup (100g) granulated sugar; 2 and 1/4 cups (281g) all-purpose flour (spooned & leveled); 2 teaspoons cornstarch; 1 teaspoon baking soda; 1/2 teaspoon salt; 2 cups (52g) crispy rice cereal; 1 cup (60g) mini marshmallows; 1 large egg, at room temperature; 1 large egg yolk, at room temperature; 2 teaspoons pure vanilla extract; Flaky sea salt, for topping

Jump to Recipe· 4.4 from 10 reviews

If you love the cozy, comforting flavors of browned butter combined with the nostalgic crunch of crispy rice cereal and sweet mini marshmallows, this Brown Butter Marshmallow Crispy Cookies Recipe is an absolute must-try. Each cookie is perfectly chewy and crisp, with that irresistible nutty aroma from the brown butter and a delightful melty marshmallow surprise inside. It’s the kind of treat that feels special enough for a gathering yet easy enough to whip up on a quiet evening when you want something to brighten your day.

Ingredients You’ll Need

A clear glass bowl holds a mix of small, uneven clusters in light golden brown shades with white puffed pieces spread throughout. The texture looks crumbly and slightly sticky, with some pieces more compact and others loose. The bowl is set against a white marbled texture, showing the mix clearly from above. photo taken with an iphone --ar 4:5 --v 7

This recipe uses simple but essential ingredients that come together to create an incredible texture and flavor harmony. Each component plays a special role, from the brown butter’s deep richness to the cereal’s crunchy surprise and the marshmallows’ gooey charm.

Unsalted butter: Browning it adds a nutty, toasty flavor that elevates the cookie beyond your usual sweet treat.
All-purpose flour: Provides the sturdy base for perfect cookie structure.
Cornstarch: Ensures a tender, soft crumb in every bite.
Baking soda: Offers just the right lift and lightness.
Salt: Enhances all the flavors and balances sweetness.
Crispy rice cereal: Gives a fun, unexpected crunch in each cookie.
Mini marshmallows: Melt slightly for pockets of gooey sweetness inside the cookie.
Brown sugar: Adds moistness and deep caramel notes.
Granulated sugar: Contributes to crisp edges and ideal sweetness.
Egg and egg yolk: Bind the dough and add richness for chewy centers.
Pure vanilla extract: Lifts the entire flavor profile with warm, aromatic notes.
Optional flaky sea salt: A sprinkle on top enhances the buttery sweetness beautifully.

How to Make Brown Butter Marshmallow Crispy Cookies Recipe

Step 1: Brown the Butter

Start by placing the butter in a light-colored skillet over medium heat so you can watch it carefully. Stir constantly as it melts until it foams and, after about 5 to 8 minutes, you’ll notice browned specks form and that irresistible nutty aroma fills your kitchen. As soon as it hits that perfect brown, remove it from heat and pour it into a heat-safe bowl, scraping up those browned bits. Let it cool slightly—this step is the secret to making these cookies unforgettable.

Step 2: Mix Dry Ingredients with Crispy Rice and Marshmallows

In a large bowl, whisk together the flour, cornstarch, baking soda, and salt to ensure even distribution. Then gently fold in the crispy rice cereal and mini marshmallows, making sure they’re well incorporated but still intact. These add the delightful texture contrast that makes this Brown Butter Marshmallow Crispy Cookies Recipe so unique and fun.

Step 3: Combine Wet Ingredients and Form Dough

Whisk the cooled brown butter with brown sugar, granulated sugar, egg, egg yolk, and vanilla extract until smooth and combined. Pour this rich mixture into the dry ingredients and stir gently with a silicone spatula until fully mixed. The dough will look a bit greasy and crumbly—that’s exactly what you want. Scoop out about 2 tablespoons per cookie and firmly roll them into balls. This helps the cookies hold their shape during baking and keeps that melty marshmallow nestled inside.

Step 4: Chill the Dough

Arrange the dough balls on a parchment-lined baking sheet and place them uncovered into the freezer for one hour. This step is crucial because it firms up the dough, leading to perfectly shaped cookies with a lovely chew and crispy edges. If you want, you can freeze the dough balls longer (up to a day), just make sure to store them in an airtight container or bag.

Step 5: Bake to Perfection

Preheat your oven to 350°F (177°C) and line baking sheets with parchment paper or Silicone mats. Place the frozen dough balls about 3 inches apart on the sheets. Bake for 14 to 15 minutes until the tops are lightly browned, edges look crisp, but centers still feel soft. If you notice the cookies haven’t spread by the 10-minute mark, give the baking sheet a few taps on the counter to encourage spreading. Look out for marshmallows peeking out—they might cause some edges to spread a bit more, which is absolutely normal.

Step 6: Finish and Cool

Optional but highly recommended, sprinkle flaky sea salt on the warm cookies right after they come out of the oven; it brings all the flavors together beautifully. Let the cookies cool on the baking sheet for about 10 minutes to set before transferring to a wire rack to cool completely. This resting time helps maintain their shape and texture.

How to Serve Brown Butter Marshmallow Crispy Cookies Recipe

The image shows eight soft, round cookies with a light golden brown color laid out on a gold wire cooling rack. Each cookie has a slightly rough texture with uneven surfaces and is embedded with white marshmallow patches that look soft and slightly melted. Some cookies have a sprinkling of coarse salt crystals on top. One cookie near the center left has a bite taken from it, revealing a chewy inside with marshmallow. The background is a white marbled surface scattered with small white mini marshmallows and cookie crumbs. In the bottom left corner, there is a white ceramic mug filled with hot chocolate topped with many floating mini marshmallows. Photo taken with an iphone --ar 4:5 --v 7

Garnishes

A light sprinkle of flaky sea salt right out of the oven adds a sophisticated touch, balancing sweetness and highlighting the browned butter’s richness. You can also melt a bit of chocolate to drizzle over for a decadent finish or add a few extra mini marshmallows on top before baking for extra gooeyness.

Side Dishes

Pair these cookies with a cold glass of milk or a cup of rich coffee to complement their warm, caramel flavors perfectly. For a fun party spread, serve alongside fresh fruit or creamy vanilla ice cream to create a delightful dessert platter that everyone will adore.

Creative Ways to Present

Try stacking a few cookies and tying them with a rustic twine ribbon for a charming gift idea. You can also sandwich a scoop of marshmallow fluff or ice cream between two cookies to make an irresistible treat. For an elegant touch at gatherings, serve the cookies on a wooden board adorned with edible flowers and fresh berries.

Make Ahead and Storage

Storing Leftovers

Once cooled, store the Brown Butter Marshmallow Crispy Cookies in an airtight container at room temperature. They will stay fresh and chewy for up to one week, making them a perfect make-ahead treat for busy days or unexpected guests.

Freezing

If you want to keep these cookies even longer, they freeze beautifully. You can freeze the dough balls before baking or freeze baked cookies wrapped tightly in plastic wrap and stored in an airtight container for up to three months. Just thaw them at room temperature before enjoying.

Reheating

For the freshest taste, warm the cookies gently in a preheated 300°F (150°C) oven for 5 minutes or so to revive their soft centers and melty marshmallow goodness. Avoid the microwave if possible, as it may make the cookies too soft or chewy in an undesirable way.

FAQs

Can I use salted butter instead of unsalted?

It’s best to use unsalted butter so you can control the salt level precisely, but if salted butter is what you have, reduce or skip adding extra salt in the recipe to avoid over-seasoning the cookies.

Will the marshmallows melt completely inside the cookies?

The mini marshmallows soften and get deliciously gooey but usually hold some shape, giving a perfect balance of chewy and melty texture without disappearing entirely.

Can I substitute crispy rice cereal with another cereal?

You could try substitutes like cornflakes or granola, but crispy rice cereal provides a light crunch that’s hard to replicate exactly. The texture and flavor combination will be different but still tasty.

Why do I need to freeze the dough before baking?

Freezing the dough solidifies the butter and marshmallows, which helps the cookies bake evenly, maintain their shape, and develop those beautifully crisp edges with soft centers. It’s an essential step for this particular recipe.

How long do these cookies stay fresh?

Stored at room temperature in an airtight container, these cookies stay fresh and delicious for about one week. After that, the texture may change, but you can always refresh them by warming briefly.

Final Thoughts

If you’re ready to treat yourself and your loved ones to a cookie that’s bursting with warm, nutty, and sweet flavors, you absolutely have to try this Brown Butter Marshmallow Crispy Cookies Recipe. It’s comfort food with a fun twist, easy enough for everyday baking yet impressive enough to serve at any occasion. Trust me, once you bake these, they’ll become a beloved staple in your cookie repertoire.