Marshmallow Cereal Cookies
These chewy marshmallow cereal cookies are packed with toasted crispy rice cereal and gooey, caramelized pockets of melted marshmallows for the ultimate sweet-and-salty crunch.
- Freezing the mini marshmallows prevents them from completely liquefying and disappearing into the dough during the bake.
- Adding the crispy cereal at the very end preserves the starch structure, keeping the crunch intact.
- Using a higher ratio of brown sugar to white sugar ensures a moist, chewy cookie base that balances the crispy cereal.
I still remember the sticky, sugar-crusted disaster of my first apartment kitchen in 2018, where I tried to shove entire handfuls of crispy rice cereal and stale marshmallows into a standard chocolate chip dough. If you love that gooey texture but want something richer, you should definitely try my double chocolate marshmallow cookies.
It was a total flop.
The marshmallows melted into aggressive, caramelized puddles that welded themselves to my cheap aluminum baking sheet, while the cereal turned into a sad, soggy mush. This happened because marshmallows are essentially pockets of air held together by gelatin, which liquefies completely under high heat, destroying the cookie's protein matrix. Bear with me here, we are dealing with sugar thermodynamics, and standard marshmallows will simply disintegrate into sticky glue if not handled with absolute precision.
The secret is freezing the marshmallows first and folding the crispy cereal in at the absolute last second. This technique is similar to how we handle texture in our rice krispie chocolate chip cookies to keep them from getting stale.
Trust me on this one, because once you master this simple workflow, you will get golden, chewy cookies with pockets of gooey marshmallow pull and a shatteringly crisp crunch. Scoop the dough with a heavy-duty trigger scoop until your thumb clicks, and watch them bake into absolute perfection.
Marshmallow Cereal Cookies
Ingredients
- 115g unsalted butter, softened (1/2 cup)
- 100g light brown sugar (1/2 cup packed)
- 50g granulated white sugar (1/4 cup)
- 1 large egg, room temperature
- 1 tsp vanilla extract
- 180g all-purpose flour (1 1/2 cups)
- 1/2 tsp baking soda
- 1 tsp Diamond Crystal kosher salt (or 1/2 tsp fine sea salt)
- 75g crispy rice cereal (1 1/2 cups)
- 50g mini marshmallows, frozen (1 cup)
Directions
- Freeze the mini marshmallows for at least 30 minutes before starting the dough.
- Preheat your oven to 350°F (175°C) and line a large baking sheet with high-quality parchment paper.
- In a large bowl, cream the softened unsalted butter, brown sugar, and white sugar together until light and fluffy.
- Beat in the egg and vanilla extract until fully incorporated and smooth.
- Whisk the flour, baking soda, and Diamond Crystal kosher salt together in a separate bowl, then fold into the wet ingredients.
- Gently fold in the crispy rice cereal and the frozen mini marshmallows until just combined.
- Scoop large mounds of dough onto the prepared baking sheet, leaving at least 2 inches of space between each cookie.
- Bake for 10 to 12 minutes until the edges are golden brown and the marshmallows are bubbly.
- Let the cookies cool on the baking sheet for 5 minutes before transferring them to a wire rack.
Notes
- I highly recommend using Diamond Crystal kosher salt; if you only have fine table salt, cut the measurement in half to 1/2 teaspoon to avoid over-salting.
- Freezing the marshmallows is crucial because it delays their melting point, allowing the cookie's protein matrix to set before the sugar completely liquefies.
- Keep a close eye on the oven during the last 2 minutes of baking; exposed marshmallows on the edges of the cookies can go from beautifully caramelized to burnt and bitter very quickly.
- After a day in an airtight container, the cereal pieces will naturally lose a bit of their shatter-crisp texture due to moisture migration, but the cookie base becomes wonderfully fudgy.
Serving Suggestions
Serve these cookies warm to get the ultimate gooey marshmallow pull, or pair them with fun additions to make them a true dessert experience.
- Serve alongside a cold glass of whole milk or a creamy oat milk latte.
- Sandwich a scoop of vanilla bean ice cream between two cooled cookies for an epic ice cream sandwich.
- Drizzle with a bit of melted dark chocolate to cut through the intense sweetness of the marshmallows.
- Plate them on a rustic wooden board for a cozy, crowd-pleasing dessert spread.
Storage and Reheating
Store these cookies in an airtight container at room temperature for up to three days. Make sure the cookies are completely cool before stacking them, or the caramelized marshmallow bits will glue them together into one giant mass.
It gets messy fast.
If you want to keep them longer, you can freeze the baked cookies for up to a month. Just wrap them individually in plastic wrap before placing them in a freezer-safe bag.
To reheat, pop a cookie into the microwave for a quick 8 to 10 seconds. This softens the cookie base and revives that glorious, stretchy marshmallow pull without drying out the crumb.
It tastes brand new.
If you have leftover cereal, you can easily whip up some no bake crispy peanut butter balls for another quick treat.
Ingredient Substitutes
If you need to swap things out based on what is in your pantry, here are the easiest conversions.
- Crispy Rice Cereal: You can swap this for cornflakes or crushed graham crackers for a different kind of crunch.
- Mini Marshmallows: If you cannot find mini marshmallows, chop regular-sized marshmallows into quarter-inch pieces before freezing.
- Brown Sugar: Dark brown sugar can be used instead of light brown sugar for a deeper, more caramel-like flavor.
- Unsalted Butter: You can use salted butter, but make sure to reduce the added salt by half to keep the flavors balanced.
Let me know if you make these, and especially if you manage to eat just one while they are still warm and gooey from the oven. Happy baking, friends!
Susan Rosie
I've spent over 12 years perfecting recipes so you can cook with confidence. Every dish on Storied Skillet is tested multiple times – because your dinner matters. I believe in simple ingredients, clear instructions, and big flavors.
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