Ever since their debut in August, Costco’s Marshmallow Crispy Cookies have taken social media by storm, captivating cookie lovers nationwide. These delightful treats aren’t just cookies; they’re an experience, perfectly balancing a wonderfully chewy, brown butter base with the satisfying crunch of rice krispies cereal and irresistibly gooey pockets of melted mini marshmallows. It’s no wonder they’ve become an instant classic and a viral sensation.
The allure of these new Costco bakery items is undeniable. Each bite delivers a harmonious blend of textures and flavors: the rich, caramelized notes from the browned butter, the comforting chewiness of a perfectly baked cookie, the playful pop and crispness of rice cereal, and those luscious, melty pockets of marshmallow that stretch and pull with every indulgence. For those who appreciate a perfectly crafted dessert, these cookies hit every mark. And for an elevated experience, try pairing one with a refreshing iced brown sugar coffee – a combination that truly highlights the cookie’s unique profile.
The secret to achieving such depth of flavor and a supremely chewy texture lies in a couple of key ingredients: browning the butter and incorporating a touch of corn syrup. Browning the butter transforms it, infusing the cookie dough with complex nutty and caramel-like undertones that elevate the overall taste beyond a standard butter cookie. Meanwhile, corn syrup contributes significantly to that desirable extra chewiness and helps maintain a moist texture. If you’ve ever savored a cookie from Costco and yearned to recreate that magic in your own kitchen, or perhaps you don’t have a Costco membership but are eager to taste these famous cookies, this comprehensive copycat recipe is your golden ticket.
The Great Debate: Copycat vs. Original Costco Marshmallow Crispy Cookies
When it comes to replicating beloved bakery items, the question inevitably arises: do these homemade copycat Costco Marshmallow Crispy Cookies truly taste exactly like the originals? In our humble opinion, we believe this recipe not only captures the essence of the Costco cookie but might even surpass it in certain aspects. However, it’s essential to understand the inherent differences between industrially baked goods and those lovingly made at home.
Commercial bakeries, like Costco’s, often rely on specific ingredients and processes to achieve consistency, extended shelf life, and cost efficiency. For instance, the original Costco recipe for these cookies primarily utilizes shortening combined with butter flavoring to achieve their characteristic look, taste, and mouthfeel. While effective for large-scale production, this approach can sometimes compromise on the depth of natural flavor.
Our copycat recipe, on the other hand, champions the use of high-quality, accessible ingredients. We emphasize browning real unsalted butter, which naturally develops that deep, nutty, and slightly caramel flavor that industrial butter flavoring attempts to mimic. A small amount of shortening is still included to ensure the cookies remain incredibly moist and chewy, mirroring the texture of the original while complementing the richer butter flavor. This thoughtful ingredient selection allows for a more robust and authentic taste profile that many home bakers find superior to mass-produced alternatives. So, while the experience may be slightly different, the homemade version offers a quality and flavor depth that’s truly unparalleled.
As you embark on your baking journey, keep this distinction in mind. The image above provides a glimpse into the ingredients used in Costco’s cookie, allowing you to directly compare them with the components in our carefully curated recipe. While we’ve optimized this copycat for home baking, adventurous cooks might consider experimenting with ratios or incorporating additional elements from the commercial list to explore new flavor dimensions. Just remember that altering the recipe can lead to different results, but that’s part of the fun of baking!
Key Ingredients for Crafting the Perfect Homemade Costco Marshmallow Crispy Cookies
Creating these sensational marshmallow crispy cookies at home requires a selection of common baking staples, each playing a vital role in achieving that coveted Costco-style texture and flavor. Below is a breakdown of the essential ingredients you’ll need. For precise measurements, please refer to the detailed recipe card at the bottom of this page.
- Unsalted Butter: This is the star ingredient! We’ll be browning it to develop deep, nutty, and caramel-like notes that form the foundation of our cookie’s rich flavor profile.
- Shortening: Crucial for adding an unparalleled chewiness and ensuring the cookies maintain their shape during baking, preventing excessive spreading. It contributes to a tender crumb.
- Dark Brown Sugar: Provides essential moisture, which contributes to the cookie’s softness, and imparts a delicious, subtle caramel flavor that complements the browned butter.
- Granulated Sugar: Balances the sweetness and helps create that slight crispness around the edges while keeping the centers wonderfully soft.
- Egg + Egg Yolk: The egg binds all the ingredients together, providing structure, while the extra egg yolk adds richness, moisture, and enhances the chewiness, making the cookie truly decadent.
- Vanilla Extract: A crucial flavor enhancer that complements the browned butter and marshmallow, adding a warm, aromatic depth to the cookies.
- All-purpose Flour: The primary structural component of the cookie dough, ensuring the cookies have the right body and consistency.
- Cornstarch: An optional but highly recommended addition that contributes significantly to the cookie’s softness and delicate texture, mimicking the melt-in-your-mouth quality of professional bakery cookies.
- Baking Powder and Soda: These leavening agents work in tandem to give the cookies a beautiful rise and a light, airy texture, preventing them from becoming too dense.
- Kosher Salt: Essential for balancing the sweetness of the sugars and marshmallows, and for enhancing all the other flavors present in the cookie dough.
- Light Corn Syrup: A secret weapon for super chewy cookies. It not only adds to the chewiness but also helps keep the cookies moist and prevents them from drying out too quickly.
- Mini Marshmallows: The namesake ingredient! These melt into wonderfully gooey, soft pockets of sweetness throughout the cookie, providing that signature chewy and melty texture.
- Rice Krispies Cereal: Incorporated directly into the dough, this cereal delivers a delightful crunch, transforming the cookie into a unique treat reminiscent of a classic rice krispies bar.
Mastering the Art: How to Make Copycat Costco Marshmallow Crispy Cookies at Home
Recreating the legendary Kirkland Signature marshmallow crispy cookies in your own kitchen is a rewarding process. Follow these detailed steps to achieve cookies that rival, or even surpass, the original. For the complete step-by-step instructions and precise measurements, make sure to consult the recipe card located at the end of this post.
- Begin with Brown Butter: In a light-colored saucepan, melt your unsalted butter over medium heat. Stir continuously to ensure even cooking. Keep a close watch as the butter will foam, then gradually begin to develop delicious golden-brown bits at the bottom of the pan. This browning process is key to the cookie’s rich flavor. Once those fragrant brown bits appear, immediately pour the browned butter into a heatproof bowl, scraping in all those flavorful solids. Allow it to cool until it’s slightly thickened, which usually takes about 15-20 minutes. This cooling step is crucial for the texture of your cookies.
- Cream the Fats and Sugars: In a large mixing bowl, combine the slightly cooled browned butter, room-temperature shortening, dark brown sugar, and granulated sugar. Using an electric mixer, beat these ingredients together for 2-3 minutes until the mixture becomes light, fluffy, and significantly paler in color. This creaming process incorporates air, which contributes to the cookie’s soft texture.
- Incorporate Wet Ingredients: Next, add the light corn syrup, the large egg, the extra egg yolk, and the vanilla extract to your creamed butter and sugar mixture. Continue to beat until all the ingredients are thoroughly combined and the mixture is smooth and glossy. Ensure no streaks of egg or corn syrup remain, as this ensures even distribution of flavor and moisture.
- Combine Dry Ingredients: In a separate, medium-sized bowl, whisk together the all-purpose flour, cornstarch, baking soda, baking powder, and kosher salt. This ensures all leavening agents and flavorings are evenly distributed before adding them to the wet mixture.
- Form the Dough: Gradually add the whisked dry ingredients to your wet mixture. Mix on low speed until just combined, being careful not to overmix the dough. Overworking the dough can develop the gluten too much, resulting in tougher cookies. Stop mixing as soon as no dry streaks of flour are visible.
- Add Mix-ins and Chill: Gently fold in the Rice Krispies cereal and a portion of the mini marshmallows. It’s highly recommended to chill your marshmallows beforehand; this prevents them from melting completely into the dough too early during mixing or baking, ensuring those delightful gooey pockets in the final cookie. Once combined, cover the brown butter dough tightly with plastic wrap and refrigerate for at least 1 hour. This crucial chilling step helps the cookies hold their shape, prevents excessive spreading in the oven, and ensures the marshmallows don’t ooze out too much. For an even richer flavor and thicker cookies, consider chilling overnight.
- Prepare for Baking: Preheat your oven to 350°F (175°C). Line a large baking sheet with parchment paper to prevent sticking and ensure even baking. Scoop out generous portions of dough, approximately 3 tablespoons each, and arrange them on the prepared baking sheet, leaving ample space between each cookie for spreading. This recipe typically yields about 13 large, Costco-sized cookies. Bake in the preheated oven for 13-15 minutes, or until the edges are golden brown but the centers still appear slightly underbaked and soft. This ensures a wonderfully chewy cookie.
- Achieve Perfect Circles: As soon as the cookies emerge from the oven, while they are still warm and pliable, use a large cookie cutter or the rim of a glass (larger than the size of your cookies) to gently swirl around each cookie. This technique helps to reshape any irregular edges, creating perfectly round cookies and neatening any marshmallow that may have slightly oozed during baking.
- The Signature Marshmallow Topping: Working quickly while the cookies are still piping hot, take a few extra mini marshmallows, break them in half, and gently press them onto the top of each cookie. The residual heat from the freshly baked cookies will slightly melt the marshmallows, allowing them to adhere beautifully and giving your homemade treats that iconic, appealing Costco cookie appearance.
- Cool and Enjoy: Allow the cookies to cool on the baking sheet for about 10 minutes before carefully transferring them to a wire rack to cool completely. This resting period is crucial as it allows the cookies to set properly and the marshmallows to firm up slightly, ensuring that perfect balance of chewy, crispy, and gooey textures when you take your first bite.
Expert Tips and Tricks for Baking the Best Marshmallow Crispy Cookies
- For Extra Softness: If your ideal cookie is exceptionally soft and chewy, consider replacing all the granulated sugar with dark brown sugar. The added molasses in brown sugar provides extra moisture and a deeper, more pronounced caramel flavor.
- Don’t Overbake: This is paramount for chewy cookies! The key is to remove them from the oven when the edges are just golden, but the centers still look slightly soft and gooey. They will continue to bake and set as they cool on the hot baking sheet.
- Chill for Flavor and Texture: While the recipe calls for a 1-hour chill, allowing the dough to chill overnight in the refrigerator works wonders. This not only results in thicker, chewier cookies but also gives the flavors more time to meld and deepen, particularly the rich brown butter notes.
- Precision in Measuring: For consistent and accurate results, especially in baking, using a kitchen scale to weigh your ingredients (especially flour) is far more precise than relying on measuring cups. This minimizes variations that can significantly impact the cookie’s texture.
- Browning Butter Wisely: Always use a light-colored saucepan when browning butter. This allows you to clearly see the color change and the formation of those crucial brown bits, helping you achieve the perfect nutty flavor without accidentally burning the butter.
- Chilled Marshmallows for Best Results: Keep your mini marshmallows in the freezer for about 15-20 minutes before folding them into the dough. This helps them maintain their shape better during mixing and baking, resulting in distinct pockets of melted marshmallow rather than them completely disappearing into the dough.
- Room Temperature Ingredients: Ensure eggs and shortening are at room temperature unless otherwise specified. This helps them emulsify properly with the other ingredients, leading to a smoother, more uniform dough and better cookie texture.
- Don’t Skimp on Salt: Kosher salt plays a crucial role in balancing the sweetness. Don’t reduce the amount, as it’s essential for enhancing the overall flavor profile and preventing the cookies from tasting overly sweet.
Why These Krispy Marshmallow Cookies Are a Must-Bake This Season
These homemade marshmallow crispy cookies aren’t just a fleeting trend; they’re a delightful baking project with countless compelling reasons to try them. Here’s why you should add this recipe to your must-bake list:
- Costco Convenience, Anywhere: This recipe is an absolute game-changer for those who aren’t Costco members or live far from a local store. Now, you can enjoy the magic of these viral cookies without needing a warehouse club card.
- Customization and Portion Control: If you’re already a fan of the original Costco cookies but find their massive 24-count containers a bit overwhelming, or if you prefer to bake smaller batches or adjust the cookie size, this recipe offers complete flexibility.
- Unbeatable Texture Perfection: Prepare for a sensory delight! The combination of soft, ultra-chewy cookie dough, perfectly gooey pockets of melted marshmallow, and the satisfying crunch of crispy rice cereal creates an unparalleled textural experience that’s truly addictive.
- Unique and Impressive: These cookies stand out from typical chocolate chip or sugar cookies. Their unique combination of flavors and textures makes them an excellent choice for parties, bake sales, holiday gatherings, or simply as an indulgent and impressive snack at home.
- Wholesome Homemade Goodness: By making these cookies yourself, you have complete control over the ingredients. You can rest assured that your homemade treats are free from the usual preservatives and artificial flavorings often found in industrial bakery items, offering a fresher, more natural taste.
- The Joy of Baking: There’s immense satisfaction in creating something so delicious from scratch. The aroma of browned butter and baking cookies filling your kitchen is a reward in itself.
Frequently Asked Questions – Your Cookie Conundrums Answered
Can I make smaller cookies instead of the giant Costco size?
Absolutely! This recipe is incredibly versatile. If you prefer smaller cookies, simply scoop out approximately 1.5 to 2 tablespoon portions of dough instead of 3 tablespoons. Keep a close eye on them during baking, as smaller cookies will bake faster. Begin checking for doneness around 8-10 minutes; they are ready when the edges are golden, and the centers still look slightly soft. Adjust cooling time accordingly before transferring to a wire rack.
Can I make the dough ahead and freeze it?
Yes, preparing the dough ahead of time and freezing it is a fantastic time-saving trick! To do so, scoop the dough into individual balls (your desired size) and arrange them on a parchment-lined baking sheet. Freeze until solid, typically 1-2 hours. Once frozen, transfer the dough balls to an airtight freezer bag or container. They can be stored for up to 2-3 months. When you’re ready to bake, simply place the frozen dough balls on a prepared baking sheet and add 2-4 minutes to the original baking time. No need to thaw!
Can I substitute the Rice Krispies cereal?
While you certainly can experiment with other cereals, Rice Krispies are specifically recommended for their incredibly light, airy, and delicate crispiness. This unique texture provides the perfect counterpoint to the soft, chewy marshmallows and rich cookie base. Other cereals, particularly denser or heavily sweetened varieties, might alter the intended texture and flavor balance of the cookie, potentially making them less “crispy” and more dense. For the authentic experience, stick with Rice Krispies.
How should I store these copycat Costco marshmallow crispy cookies?
To maintain their optimal freshness and chewiness, store your leftover cookies in an airtight container at room temperature for up to 3 days. If you need to keep them longer, they can be refrigerated for up to 5 days. For an extra secret tip to keep cookies incredibly soft, place a slice of plain bread or a small tortilla in the airtight container with them. The bread/tortilla will absorb any excess moisture, keeping your cookies wonderfully soft and perfectly chewy every time!
Can I make a gluten-free version of this recipe?
While I haven’t personally tested a gluten-free adaptation, it is likely achievable. You would need to swap the all-purpose flour for a reputable 1:1 gluten-free flour blend. Be aware that different gluten-free flour blends can behave slightly differently, so you might need to make minor adjustments to the amount of liquid or the baking time. Start with the recommended baking time and adjust as needed, looking for those golden edges and slightly soft centers.
Why is browning the butter so important for this recipe?
Browning the butter is a game-changer! When butter is gently heated, its milk solids toast and caramelize, developing deep, complex flavors reminiscent of toasted nuts and rich toffee. This simple step infuses the entire cookie with an incredible depth that plain melted butter simply cannot provide, elevating the overall taste to a gourmet level and making these copycat cookies truly exceptional.
What if my marshmallows melt completely in the oven?
There are a few reasons this might happen. First, ensure your mini marshmallows are adequately chilled, as this slows down their melting. Second, avoid overmixing the dough after adding the marshmallows, as excessive agitation can break them down. Finally, make sure your oven temperature is accurate; an oven that runs too hot can cause marshmallows to melt too quickly. Adding extra marshmallows to the top of the cookies immediately after baking, as described in step 9, also helps ensure you get those beautiful gooey pockets on top.
5 from 1 vote
Costco Marshmallow Crispy Cookies Copycat Recipe
20 minutes
13 minutes
1 hour
33 minutes
13
cookies
Print Recipe
Ingredients
- 7 tbsp unsalted butter will brown down to ~85 g
- 2 tbsp shortening room temperature
- 1/3 cup light brown sugar packed
- 1/3 cup granulated sugar
- 1 large egg room temperature
- 1 egg yolk room temperature
- 1 tsp vanilla extract
- 1 & 3/4 cup all-purpose flour
- 1/2 tsp cornstarch
- ½ tsp baking soda
- ¼ tsp baking powder
- ½ tsp kosher salt
- 1 & 1/2 tbsp light corn syrup
- 2/3 cup mini marshmallows more to top the cookie with
- 1 &1/2 cup Rice Krispies cereal
Instructions
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Melt the butter in a light-colored saucepan over medium heat, stirring constantly. Watch for foaming, then golden brown bits at the bottom.7 tbsp unsalted butter
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Pour into a heatproof bowl, scraping in all the browned bits. Cool until slightly thickened (~85 g).
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Beat together browned butter, shortening, brown sugar, and granulated sugar for 2–3 minutes until light and fluffy.2 tbsp shortening, 1/3 cup light brown sugar, 1/3 cup granulated sugar
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Beat in corn syrup, egg, egg yolk, and vanilla until smooth and glossy.1 large egg, 1 tsp vanilla extract, 1 & 1/2 tbsp light corn syrup, 1 egg yolk
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In a separate bowl, whisk together flour, cornstarch, baking soda, baking powder, and salt. Gradually mix into wet ingredients until just combined.1 & 3/4 cup all-purpose flour, 1/2 tsp cornstarch, ½ tsp baking soda, ¼ tsp baking powder, ½ tsp kosher salt
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Gently fold in Rice Krispies, and marshmallows.2/3 cup mini marshmallows, 1 &1/2 cup Rice Krispies cereal
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Cover and chill 1 hour. This helps marshmallows not ooze too much and prevents excess spreading.
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Preheat oven to 350F and line a baking sheet with parchment.
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Scoop 3 Tbsp portions and space well apart. Bake 13-15 minutes until edges are golden but centers still slightly underbaked.
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As soon as the cookies come out of the oven, use a larger cookie cutter than the size of the cookies to swirl them around so that they are a perfect circle and keep any marshmallow that could’ve oozed out inside
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.Working quickly, take a few mini marshmallows, break them in half, and stick them on the hot cookies to give them that signature Costco cookie look.
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Let cookies rest on the baking sheet for 10 min before transferring to a wire rack. Marshmallows will set as they cool.
Nutrition
Nutrition information is automatically calculated, so should only be used as an approximation.