Costco-Style Marshmallow Crispy Cookies Recipe

ByLucy
Jump to Recipe· 4.8 from 35 reviews

If you’re anything like me, you love a cookie that’s thin, chewy, and bursting with texture — and that’s exactly why I can’t stop making this Costco-Style Marshmallow Crispy Cookies Recipe. These cookies are a fan-freaking-tastic treat that combines the buttery goodness of browned butter with the crisp crunch of Rice Krispies and the sweet gooeyness of mini marshmallows. Wait until you see how easy and rewarding this recipe is; trust me, it’ll be your new go-to snack!

💚

Why This Recipe Works

  • Brown Butter Magic: Browning the butter adds an irresistible nutty depth that elevates these cookies well beyond ordinary.
  • Perfect Texture Blend: Combining crispy rice cereal with mini marshmallows gives a chewy, crunchy combo that’s just so fun to bite into.
  • Simple Ingredients, Big Flavor: Using pantry staples and a gentle mix keeps things easy but still delivers that signature Costco taste.
  • Balanced Sweetness: The sprinkle of flaked salt on top wakes up all the flavors and prevents the cookie from being too sweet.
Costco-Style Marshmallow Crispy Cookies, crispy rice cereal cookies, easy marshmallow chocolate chip cookies, buttery no-bake crispy treats, chewy crunchy snack - The image shows a close-up of eight round cookies laid out on a baking sheet lined with white parchment paper. Each cookie is a golden brown color with a slightly darker edge, and the surface has a mix of soft, bumpy textures with small cracks and visible oat pieces. Some white spots of melted marshmallow peek through the cookies, giving them a soft and chewy appearance. There is also a visible sprinkle of coarse salt flakes on top of each cookie, adding a subtle sparkle. The baking sheet has a dark brown edge and is placed on a white marbled surface. photo taken with an iphone --ar 2:3 --v 7 this …

Ingredients & Why They Work

Every ingredient here plays a part in making these cookies pop with flavor and texture. I always recommend using real brown butter and vanilla paste if you have it—it makes a surprising difference. Plus, buying your Rice Krispies in bulk (Costco, anyone?) means you can whip these up anytime without running out.

Costco-Style Marshmallow Crispy Cookies, crispy rice cereal cookies, easy marshmallow chocolate chip cookies, buttery no-bake crispy treats, chewy crunchy snack - Flat lay of a small white ceramic bowl of golden browned butter, a small white ceramic bowl filled with light and dark brown sugar crystals, a small white ceramic bowl of fine white granulated sugar, one large whole egg with a clean shell, a small white ceramic bowl with creamy vanilla paste, a small white ceramic bowl of fine white baking soda powder, a small white ceramic bowl of flaky white salt, a small white ceramic bowl heaped with all-purpose flour, a small white ceramic bowl holding light and crispy rice krispie cereal, a small white ceramic bowl filled with soft white mini marshmallows, and a small white ceramic bowl with coarse flaked sea salt, all arranged in perfect symmetry and realistic proportions, placed on a clean white marble surface, soft natural light, photo taken with an iPhone, professional food photography style, fresh ingredients, white ceramic bowls, no bottles, no duplicates, no utensils, no packaging --ar 2:3 --v 7 --p m7354615311229779997
  • Salted butter: Browning it develops that beautiful caramel-like flavor essential for this recipe’s depth.
  • Brown sugar: Adds moisture and a rich, molasses undertone that keeps cookies soft and chewy.
  • Granulated sugar: Helps with spreading and crisp edges—classic cookie magic.
  • Egg: Binds it all together and contributes to the chewy texture.
  • Vanilla (paste preferred): Adds a natural, intense sweetness that pairs perfectly with marshmallow notes.
  • Baking soda: Just enough leavening to give a slight lift without puffing the cookies too thick.
  • Salt: Enhances all flavors and balances the sweetness.
  • All-purpose flour: The sturdy backbone of the cookie, holding all the fun bits together. Measuring properly is key here!
  • Rice Krispies cereal: Gives that iconic crispy crunch contrasting the chewy cookie base.
  • Mini marshmallows: Little pockets of gooey, sweet softness within every bite.
  • Flaked salt: For sprinkling on top—totally optional but highly recommended to boost flavor complexity.
📝
Note: You’ll find the complete list of ingredients, along with their exact measurements, in the printable recipe card at the bottom of this post.

Make It Your Way

One of the things I love about this Costco-Style Marshmallow Crispy Cookies Recipe is how easy it is to make your own. I often mix it up depending on what I have around or my mood — and you totally should, too! Don’t hesitate to tweak the marshmallows or even experiment with mix-ins.

  • Chocolate chips: I once added mini chocolate chips alongside the marshmallows, and oh man, it added a luscious melty surprise to every bite.
  • Thicker cookies: If you prefer a thicker cookie, try adding 2 extra tablespoons of flour—just like I did when I wanted a heftier treat for dunking in milk.
  • Gluten-free swap: For friends with sensitivities, rice flour works well here, just keep in mind texture differences with the cereal.
  • Flavor twist: A pinch of cinnamon or a dash of espresso powder can bring a cozy note I’ve found delightful on chilly days.

Step-by-Step: How I Make Costco-Style Marshmallow Crispy Cookies Recipe

Step 1: Brown That Butter Like a Pro

I start by melting the butter in a medium saucepan over medium heat. Keep stirring because it will foam up and then suddenly change color to a gorgeous golden brown with a nutty aroma—that’s your cue! This step might seem small, but trust me, it makes the cookie flavor sing. Once browned, I pour the butter into a bowl and pop it in the fridge or freezer for about 10 minutes to cool—it shouldn’t be hot when you mix it with the sugars and egg.

Step 2: Mix the Sugars and Eggs Gently

Next, combine the cooled browned butter with brown sugar and granulated sugar in a bowl. I mix this on low speed with my mixer until everything is smooth, then add the egg and vanilla. About 30 seconds is all it takes—no overmixing here, which keeps the cookies tender.

Step 3: Add Dry Ingredients Carefully

Slowly mix in salt, baking soda, and flour. The trick here is to add the flour gradually and mix just until incorporated. Overworking the dough can make cookies tough, and we definitely want soft, chewy ones! I like to stop mixing as soon as I don’t see any white flour.

Step 4: Fold in the Cereal and Marshmallows

Now the fun part—fold in the crispy rice cereal, followed by the mini marshmallows. I like to fold gently to avoid crushing the cereal pieces, which helps maintain that delightful crunchy texture.

Step 5: Scoop and Bake

I scoop large amounts of dough—about 3 tablespoons each—onto parchment-lined baking sheets, making sure to space them out because these cookies spread thin. I bake them at 350°F (175°C) for about 10 to 13 minutes until you see the edges start to turn light golden brown. Keep an eye on them – overbaking means you lose that chewy center we all love. Right out of the oven, I sprinkle some flaked salt for a savory lift.

💡

Tips from My Kitchen

  • Watch Your Butter: The browning process happens fast, so keep stirring to avoid burning and ruin the flavor.
  • Measure Flour Lightly: Spoon your flour into the measuring cup lightly to avoid dense cookies; this helped me nail the texture.
  • Don’t Overbake: Pull them out when edges are golden but centers still look soft—they firm up as they cool.
  • Fresh Marshmallows Matter: Using fresh mini marshmallows ensures they melt just enough without becoming too sticky or losing their shape.

How to Serve Costco-Style Marshmallow Crispy Cookies Recipe

Costco-Style Marshmallow Crispy Cookies, crispy rice cereal cookies, easy marshmallow chocolate chip cookies, buttery no-bake crispy treats, chewy crunchy snack - A broken round cookie with a rough, golden brown outer edge and a softer, chewy center is shown on a white marbled surface. The cookie is split into two pieces pulled apart, revealing stretchy melted white cheese strands connecting the halves. The cookie’s top is sprinkled with coarse salt flakes, adding texture and shine to the warm and inviting baked treat photo taken with an iphone --ar 2:3 --v 7

Garnishes

I almost always sprinkle flaky sea salt right after baking because it brings a perfect salty-sweet balance. Sometimes I dust the top lightly with powdered sugar for a pretty finish, especially if I’m gifting these cookies.

Side Dishes

These cookies pair beautifully with a cold glass of milk — classic for a reason! I’ve also enjoyed them alongside a hot cup of coffee or even a scoop of vanilla ice cream for a decadent dessert treat.

Creative Ways to Present

For holiday parties, I stack these cookies and tie them together with a festive ribbon for a charming gift. Or try sandwiching some marshmallow fluff between two cookies — your friends will be blown away by the ooey gooey surprise.

Make Ahead and Storage

Storing Leftovers

I store these cookies in an airtight container at room temperature. They keep nicely for up to 4 days, but honestly, they rarely last that long in my house! Keeping them sealed maintains that crunchy-chewy texture.

Freezing

If I’m making a big batch, I freeze leftover cookies in a zip-top bag with parchment paper between layers. They freeze well for about 2 months. When I’m ready, I let them thaw at room temp for about 20 minutes.

Reheating

To revive that just-baked softness, I pop cookies in the microwave for 10-15 seconds or warm them in a 300°F oven for a few minutes. This little trick restores that delightful gooey marshmallow center without drying out the cookie.

FAQs

  1. Can I use regular marshmallows instead of mini marshmallows?

    You can, but you’ll want to chop them into smaller pieces so they distribute better throughout the cookies. Using mini marshmallows is easier and means they melt evenly, giving those perfect gooey spots.

  2. Why do these cookies spread so thin?

    The combination of browned butter and a relatively low flour ratio causes the dough to spread thin during baking. For thicker cookies, adding a bit more flour will help. Just don’t overdo it, or you’ll lose that delicate chewiness.

  3. Can I skip the browned butter step?

    While you can skip it, browning the butter really makes a big flavor difference. Plain melted butter won’t give you that nutty, rich taste that takes these cookies from good to incredible.

  4. Is it okay to use salted butter if the recipe calls for salt?

    Yes! Using salted butter along with a bit of extra flaked salt on top enhances the flavor nicely. Just don’t double the salt amount without tasting first.

  5. How do I prevent marshmallows from melting too much?

    Fold them in gently at the end and don’t overbake the cookies. Proper baking time ensures marshmallows soften without completely disappearing, preserving those delightful pockets of gooey sweetness.

Final Thoughts

Honestly, this Costco-Style Marshmallow Crispy Cookies Recipe was a delightful discovery for me, a way to recreate one of my favorite cookie shop treats right in my kitchen. It combines so many textures and flavors that keep me reaching for “just one more.” I hope when you make these you enjoy the little moments of mixing, the warm buttery aroma, and of course—biting into that perfect crispy-chewy marshmallow bite—as much as I do. Give it a try, tweak it to your liking, and get ready for some serious cookie love!

Print
clock clock iconcutlery cutlery iconflag flag iconfolder folder iconinstagram instagram iconpinterest pinterest iconfacebook facebook iconprint print iconsquares squares iconheart heart iconheart solid heart solid icon

Costco-Style Marshmallow Crispy Cookies Recipe

5 Stars 4 Stars 3 Stars 2 Stars 1 Star 4.8 from 35 reviews
  • Author: Lucy
  • Prep Time: 25 minutes
  • Cook Time: 13 minutes
  • Total Time: 38 minutes
  • Yield: 13 cookies
  • Category: Dessert
  • Method: Baking
  • Cuisine: American
Print Recipe

Description

Delightfully thin and buttery Marshmallow Crispy Cookies inspired by Costco’s popular treat. These cookies feature browned butter for a nutty depth, crispy rice cereal for crunch, and mini marshmallows for a gooey surprise, topped with a sprinkle of flaked salt to balance the sweetness.

Ingredients

Units Scale

Cookie Dough

  • 1/2 cup (113.5 g) salted butter
  • 3/4 cup (165 g) brown sugar
  • 1/2 cup (100 g) granulated sugar
  • 1 large egg, room temperature
  • 1 teaspoon vanilla extract or vanilla paste
  • 1/2 teaspoon baking soda
  • 3/4 teaspoon salt
  • 1 cup (158 g) + 2 tablespoon all-purpose flour
  • 1 1/2 cups (43 g) rice krispie cereal
  • 2/3 cup (30 g) mini marshmallows

Topping

  • Flaked salt for sprinkling

Instructions

  1. Preheat the oven. Preheat your oven to 350 degrees Fahrenheit and line a baking sheet with parchment paper to prevent sticking and ensure even baking.
  2. Browning the butter. Melt ½ cup salted butter in a medium saucepan over medium heat. Continue cooking past boiling, stirring constantly, until the butter turns a golden brown color and emits a nutty aroma. Be vigilant to prevent burning. Once browned, transfer the butter to a bowl and chill it in the fridge or freezer for about 10 minutes to cool.
  3. Mix sugars and browned butter. In a medium mixing bowl, combine the cooled browned butter with ¾ cup brown sugar and ½ cup granulated sugar. Mix well until incorporated.
  4. Add egg and vanilla. Add 1 large room temperature egg and 1 teaspoon vanilla extract or vanilla paste to the sugar mixture. Mix on low speed until the batter is smooth, about 30 seconds.
  5. Add dry ingredients. Gradually add ½ teaspoon baking soda, ¾ teaspoon salt, and 1 cup plus 2 tablespoons all-purpose flour to the batter. Mix gently to combine, ensuring not to overmix to keep the cookies tender.
  6. Fold in cereal and marshmallows. Gently fold in 1½ cups rice krispie cereal followed by ⅔ cup mini marshmallows until evenly distributed throughout the dough.
  7. Scoop the dough. Using a 3-tablespoon cookie scoop or a large spoon, scoop dough balls onto the prepared baking sheet, placing 4-5 cookies per sheet to allow space for spreading as they bake thin.
  8. Bake the cookies. Bake the cookies for 13 minutes or until the edges turn a light golden brown. Avoid overbaking to maintain a chewy center.
  9. Add flaked salt and cool. Immediately after removing from the oven, sprinkle cookies with flaked salt. Let them cool on the baking sheet before transferring to a wire rack to cool completely.

Notes

  • For thicker cookies, add an extra 2 tablespoons of flour to the dough.
  • Use grams when measuring flour for more accuracy, but spoons and cups work fine if you spoon the flour lightly to avoid packing.
  • Browning the butter adds delicious depth but requires close attention to avoid burning.
  • Use parchment paper or a silicone mat to prevent sticking and promote even baking.
  • Adjust mini marshmallows quantity slightly if you prefer more gooeyness.

Nutrition

  • Serving Size: 1 cookie
  • Calories: 180 kcal
  • Sugar: 12 g
  • Sodium: 110 mg
  • Fat: 8 g
  • Saturated Fat: 5 g
  • Unsaturated Fat: 3 g
  • Trans Fat: 0 g
  • Carbohydrates: 24 g
  • Fiber: 1 g
  • Protein: 2 g
  • Cholesterol: 30 mg

You Might Also Like These Recipes

Leave a Reply

Your email address will not be published. Required fields are marked *

Recipe rating 5 Stars 4 Stars 3 Stars 2 Stars 1 Star