Marshmallow Crispy Cookies (Costco Copycat) Recipe
Introduction
These Marshmallow Crispy Cookies are a fun and delicious twist on classic treats, combining the chewiness of cookies with the light crunch of rice krispies and gooey mini marshmallows. Inspired by a popular Costco favorite, they’re easy to make and perfect for sharing or satisfying your sweet tooth.
Ingredients
- ½ cup salted butter
- ¾ cup brown sugar
- ½ cup granulated sugar
- 1 large egg (room temperature)
- 1 teaspoon vanilla (vanilla paste works well here)
- ½ teaspoon baking soda
- ¾ teaspoon salt
- 1 cup + 2 tablespoons all-purpose flour
- 1½ cups rice krispie cereal
- ⅔ cup mini marshmallows
- Flaked salt for topping
Instructions
- Step 1: Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper.
- Step 2: Brown the butter by melting it in a medium saucepan over medium heat. Continue cooking past the boiling point, stirring constantly until it turns golden brown and smells nutty. Watch carefully to avoid burning. Once browned, transfer the butter to a bowl and chill in the fridge or freezer for about 10 minutes.
- Step 3: In a medium mixing bowl, combine the cooled brown butter with brown and granulated sugars. Add the egg and vanilla, mixing on low speed until smooth, about 30 seconds.
- Step 4: Gradually add the salt, baking soda, and flour, mixing gently to avoid overworking the dough.
- Step 5: Fold in the rice krispie cereal followed by the mini marshmallows evenly into the dough.
- Step 6: Use a 3-tablespoon cookie scoop to portion out large balls of dough. Place 4 to 5 cookies per baking sheet, leaving space between them as they will spread thin.
- Step 7: Bake for 10 to 13 minutes until the edges are lightly golden brown. Avoid overbaking to keep the chewy center. Remove from the oven and sprinkle with flaked salt while still warm.
Tips & Variations
- For deeper flavor, use vanilla paste instead of extract.
- Make sure the browned butter is cool before mixing with sugars to prevent scrambling the egg.
- You can swap rice krispie cereal for another crispy cereal if preferred.
- Add a handful of chocolate chips for extra richness.
- Press the mini marshmallows slightly into the dough balls before baking to keep them from melting away.
Storage
Store the cookies in an airtight container at room temperature for up to 4 days. To keep them chewy, you can place a slice of bread in the container to maintain moisture. Reheat briefly in the microwave if you prefer the marshmallows soft and melty again.
How to Serve
Serve this delicious recipe with your favorite sides.
FAQs
Can I use unsalted butter instead of salted butter?
Yes, you can use unsalted butter; just add an extra ¼ teaspoon of salt to the dough to maintain the right balance of flavor.
Will the marshmallows melt completely during baking?
The mini marshmallows soften and melt slightly but mostly stay intact, giving the cookies their signature gooey pockets. Pressing them gently into the dough helps them stay visible after baking.
PrintMarshmallow Crispy Cookies (Costco Copycat) Recipe
These Marshmallow Crispy Cookies are a delightful Costco copycat treat combining the rich nuttiness of browned butter with the crunch of rice krispie cereal and the sweet chewiness of mini marshmallows. Perfectly golden with a salty finish, these cookies offer a unique texture and flavor experience that’s irresistible for any sweet tooth.
- Prep Time: 15 minutes
- Cook Time: 13 minutes
- Total Time: 28 minutes
- Yield: 13 servings (approximately 13 cookies) 1x
- Category: Dessert
- Method: Baking
- Cuisine: American
Ingredients
Wet Ingredients
- ½ cup salted butter
- 1 large egg (room temperature)
- 1 teaspoon vanilla extract or vanilla paste
Dry Ingredients
- ¾ cup brown sugar
- ½ cup granulated sugar
- ½ teaspoon baking soda
- ¾ teaspoon salt
- 1 cup + 2 tablespoons all-purpose flour
Mix-ins and Toppings
- 1½ cups rice krispie cereal
- ⅔ cup mini marshmallows
- Flaked salt for topping
Instructions
- Preheat Oven: Preheat your oven to 350°F (175°C). Line a baking sheet with parchment paper to prevent sticking and make cleanup easier.
- Bread the Butter: In a medium saucepan over medium heat, melt ½ cup salted butter. Continue cooking past the boiling stage until the butter foams and then turns a golden brown with a nutty aroma. Stir constantly to avoid burning. Immediately remove from heat and transfer to a bowl. Chill in the fridge or freezer for about 10 minutes to cool.
- Mix Butter and Sugars: In a medium mixing bowl, combine the cooled browned butter with ¾ cup brown sugar and ½ cup granulated sugar. Add in the egg and vanilla extract, and mix on low speed until the batter is smooth—about 30 seconds.
- Add Dry Ingredients: Gradually incorporate ¾ teaspoon salt, ½ teaspoon baking soda, and 1 cup plus 2 tablespoons all-purpose flour into the wet mixture. Mix gently to combine, being careful not to overwork the dough.
- Fold in Cereal and Marshmallows: Gently fold 1½ cups of rice krispie cereal into the dough, followed by ⅔ cup mini marshmallows, ensuring they are evenly distributed without crushing the cereal.
- Scoop Dough: Using a 3-tablespoon cookie scoop or a large spoon, portion the dough into balls. Place 4 to 5 cookies on each prepared baking sheet, spacing them out as they will spread thinly during baking.
- Bake and Finish: Bake the cookies in the preheated oven for 10 to 13 minutes until the edges are lightly golden brown. Avoid overbaking to keep a chewy center. Once out of the oven, immediately sprinkle with flaked salt to enhance the flavor.
Notes
- Ensure the butter is browned properly without burning for the best nutty flavor.
- Chilling the browned butter before mixing prevents it from cooking the egg when incorporated.
- Use a large cookie scoop to maintain consistent cookie sizes and even baking.
- Do not overbake; the cookies should be lightly browned on the edges but still soft in the center.
- Flaked salt on top adds a flavorful contrast that complements the sweet marshmallows.
Keywords: marshmallow cookies, crispy cookies, Costco copycat, rice krispie cookies, browned butter cookies, chewy cookies, easy dessert
