These Marshmallow Crispy Cookies are the ultimate mashup of a chewy brown butter cookie and the nostalgic crunch of a classic cereal treat. If you are looking for a cookie that offers a complex, nutty flavor balanced by gooey pockets of sweetness, this is the recipe you have been waiting for.
Featuring toasted browned butter, light-as-air rice cereal, and melted mini marshmallows, these cookies are finished with a delicate sprinkle of flaked salt for a truly gourmet, salty-sweet experience.
Recipe Details
- Flavor Profile: Deeply caramelized and nutty from the browned butter, with a sweet marshmallow finish and a hint of salt.
- Textures: Crisp, thin edges with a soft, chewy center and a light, airy crunch from the rice cereal.
- Total Time: Approximately 15 minutes of prep, 10 minutes of cooling time, and 10-13 minutes of baking.
- Difficulty: Easy. The most important skill is watching the butter as it browns to achieve that perfect golden hue.
What You’ll Need
This recipe starts with high-quality salted butter that is transformed into a fragrant liquid gold. You will combine it with a blend of brown and granulated sugars, a large egg, and vanilla to create a rich base. The signature texture comes from a specific ratio of all-purpose flour, rice krispie cereal, and mini marshmallows, resulting in a cookie that is as interesting to eat as it is delicious.
Ingredient Notes
- Salted Butter – Using salted butter for browning adds a savory depth that perfectly complements the sweet marshmallows.
- Brown Sugar – This provides the essential moisture needed to ensure the centers of the cookies remain chewy.
- Vanilla – While extract works well, this is an excellent opportunity to use vanilla paste to get those beautiful black bean specks throughout the dough.
- Rice Krispie Cereal – This adds a delicate, toasted crunch that stays crisp even after the cookies are baked.
- Mini Marshmallows – These melt into the dough, creating pockets of sticky caramel-like sweetness.
- Flaked Salt – A necessary finish to balance the sweetness and highlight the nutty notes of the butter.
Add-ins and Substitutions
- Chocolate Variety: If you want a richer experience, you can fold in 1/2 cup of semi-sweet chocolate chips along with the cereal.
- Spice: A pinch of cinnamon added to the dry ingredients can enhance the warm, toasted flavors of the browned butter.
- Butter Note: If you only have unsalted butter on hand, increase the salt in the dough by an additional 1/4 teaspoon.
How to Make Marshmallow Crispy Cookies
The process begins with browning the butter, a step that adds incredible depth of flavor. By following the cooling and mixing sequence below, you will ensure a perfect dough consistency every time.
- Brown the Butter: Melt the butter in a saucepan over medium heat. Continue cooking past the boiling and foaming stages until it turns golden brown and smells nutty. Immediately pour it into a bowl and cool in the fridge or freezer for 10 minutes.
- Mix Sugars and Fats: Combine the cooled brown butter with both sugars. Add the egg and vanilla, mixing on low for about 30 seconds until the mixture is smooth.
- Add Dry Ingredients: Slowly mix in the salt, baking soda, and flour. Be careful not to over-mix the dough at this stage to keep the cookies tender.
- Fold in Textures: Gently fold in the rice krispie cereal, followed by the mini marshmallows, until they are evenly distributed.
- Scoop and Space: Use a 3 tablespoon scoop to form large balls. Place only 4-5 cookies per sheet, as these spread thin and require plenty of room.
- Bake and Season: Bake at 350 F for 10-13 minutes until the edges are light golden brown. Sprinkle with flaked salt immediately upon removal from the oven.
Pro Tip: Pay close attention during the browning of the butter. Once the butter stops foaming and you see golden-brown flecks at the bottom, it can turn to burnt in a matter of seconds. Have your cooling bowl ready to go so you can stop the cooking process instantly.
Recipe Tips
- Cool the Butter Properly: Do not skip the 10-minute cooling period. If the butter is too hot, it will melt the sugars too quickly and lead to a greasy cookie.
- Do Not Over-mix: When adding the flour, mix only until just combined. Over-mixing develops gluten, which can make the cookies tough instead of chewy.
- Watch the Edges: Because these cookies spread thin, they can go from golden to over-baked quickly. Pull them out when the edges are just set and light brown.
- Space Them Out: These cookies are meant to spread. Giving them 3-4 inches of space ensures they don’t run into each other and stay perfectly circular.
FAQs
Why do my cookies look thin? This recipe is designed to spread thin, which creates those delicious crispy edges. The combination of browned butter and the specific sugar ratio encourages this texture.
Can I use large marshmallows? Mini marshmallows are highly recommended because they distribute more evenly throughout the dough. Large marshmallows would create massive, sticky gaps that might cause the cookies to fall apart.
What if I don’t have vanilla paste? A high-quality pure vanilla extract is a perfectly fine substitute. The flavor will still be wonderful.
Serving Suggestions
- Cold Milk – The classic pairing. The crispiness of the cereal in the cookie is delightful when dipped in cold milk.
- Coffee – The nutty brown butter notes are a perfect match for a dark roast coffee or a creamy latte.
- Ice Cream Sandwich – Because these cookies are thin and chewy, they make incredible shells for a vanilla bean ice cream sandwich.
Make This Recipe in Advance
You can prepare the cookie dough and keep it in the refrigerator for up to 48 hours before baking. If you want to freeze them, scoop the dough into balls and freeze on a tray before transferring to a bag. When you are ready to bake, just add 1-2 minutes to the total baking time.
Marshmallow Crispy Cookies
- Total Time: 38 minutes
- Yield: 12 cookies 1x
- Diet: Vegetarian
Description
These Marshmallow Crispy Cookies are the ultimate mashup of a chewy brown butter cookie and the nostalgic crunch of a classic cereal treat. Featuring toasted browned butter, light-as-air rice cereal, and melted mini marshmallows, these cookies offer a complex, nutty flavor balanced by gooey pockets of sweetness. Finished with a delicate sprinkle of flaked salt, they provide a truly gourmet salty-sweet experience that is crisp on the edges and soft in the center.
Ingredients
- 1/2 cup salted butter
- 3/4 cup brown sugar
- 1/2 cup granulated sugar
- 1 large egg, room temperature
- 1 teaspoon vanilla (or vanilla paste)
- 1/2 teaspoon baking soda
- 3/4 teaspoon salt
- 1 cup + 2 tablespoons all-purpose flour
- 1 1/2 cups rice krispie cereal
- 2/3 cup mini marshmallows
- flaked salt, for topping
Instructions
Step 1: Brown the Butter
Melt the butter in a saucepan over medium heat. Continue cooking past the boiling and foaming stages until it turns golden brown and smells nutty. Immediately pour it into a bowl and cool in the fridge or freezer for 10 minutes.
Step 2: Mix Sugars and Fats
Combine the cooled brown butter with both brown and granulated sugars. Add the egg and vanilla, mixing on low for about 30 seconds until the mixture is smooth and emulsified.
Step 3: Add Dry Ingredients
Slowly mix in the salt, baking soda, and flour. Be careful not to over-mix the dough at this stage to keep the cookies tender.
Step 4: Fold in Textures
Gently fold in the rice krispie cereal using a spatula, followed by the mini marshmallows, until they are evenly distributed throughout the dough.
Step 5: Scoop and Space
Use a 3 tablespoon scoop to form large balls. Place only 4-5 cookies per sheet, as these spread thin and require at least 3-4 inches of space to remain perfectly circular.
Step 6: Bake and Season
Bake at 350°F for 10-13 minutes until the edges are light golden brown. Sprinkle with flaked salt immediately upon removal from the oven while the marshmallows are still tacky.
Notes
Butter Temperature: Do not skip the 10-minute cooling period for the browned butter. If the butter is too hot when mixed with the sugars, the cookies will spread excessively and become greasy rather than chewy.
Storage Instructions: These cookies are best enjoyed within 2 days to maintain the crunch of the rice cereal. Store in an airtight container at room temperature. If they soften too much, you can crisp them up in a 300°F oven for 2-3 minutes.
Variation – Chocolate Chip Crispy: For a richer flavor profile, fold in 1/2 cup of semi-sweet chocolate chips along with the cereal. The bitterness of the chocolate pairs beautifully with the caramelized notes of the brown butter.
- Prep Time: 15 minutes
- Cook Time: 13 minutes
- Category: Dessert
- Method: Baking
- Cuisine: American
Nutrition
- Serving Size: 1 cookie
- Calories: 225
- Sugar: 21g
- Sodium: 280mg
- Fat: 9g
- Saturated Fat: 6g
- Unsaturated Fat: 3g
- Trans Fat: 0g
- Carbohydrates: 34g
- Fiber: 1g
- Protein: 2g
- Cholesterol: 35mg
Keywords: marshmallow crispy cookies, brown butter cereal cookies, rice krispie treats cookies, salty sweet marshmallow cookies, chewy brown butter cookies
