There’s something magical about cookies that defy the norm, and these Flourless Monster Cookies are no exception! Perfectly chewy, with a delightful crunch from oats and a sweet burst from mini M&Ms, they're a mouthwatering treat that’ll have you questioning why you ever settled for store-bought. The best part? They come together in just 10 minutes of prep and are entirely gluten-free, making them a crowd-pleaser that fits into any diet. Plus, with a rich peanut butter base and melty chocolate bits, these cookies are a guaranteed family favorite—and they won’t last long in your kitchen! Curious about how to whip up this scrumptious recipe? Let’s dive in!

Why are these Monster Cookies so special?
Unmatched flavor: Each bite is a delightful explosion of peanut butter, chocolate, and candy-coated sweetness.
No flour required: These cookies are naturally gluten-free, perfect for those with dietary restrictions.
Quick and easy: With just 10 minutes of prep time, you can whip up a batch even on a busy day!
Perfect for sharing: They yield 24 chewy cookies, making them a hit for parties or family gatherings.
Versatile ingredient swap: Feel free to mix in your favorite add-ins, like nuts or dried fruit, for a unique twist!
Flourless Monster Cookie Ingredients
For the Cookie Base
• Peanut butter – a creamy or crunchy option adds the perfect rich flavor.
• Light brown sugar – provides caramel notes that enhance the overall sweetness.
• Granulated sugar – balances the richness and adds to the cookie’s chewy texture.
• Large eggs – these act as a binding agent for a cohesive cookie.
• Vanilla extract – a splash enhances the flavor profile, making the cookies even more delicious.
For the Affair of Flavor
• Old-fashioned oats – these add a wonderful chewy texture and wholesome feel.
• Baking soda – helps the cookies rise slightly, giving them a light texture.
• Salt – a pinch enhances all the sweet flavors and balances the richness.
For the Sweet Surprises
• Mini M&Ms – these irresistible candies provide sweet bursts of color and crunch.
• Semisweet chocolate chips – they melt beautifully, adding a rich chocolaty experience.
These Flourless Monster Cookies are not just delicious; they're also an indulgent treat that will satisfy your sweet cravings!
Step‑by‑Step Instructions for Flourless Monster Cookies
Step 1: Preheat and Prepare
Begin by preheating your oven to 350°F (175°C). While the oven warms up, take a baking sheet and line it with parchment paper to prevent sticking and ensure an easy cleanup. Setting the stage this way will prepare you for perfectly baked Flourless Monster Cookies that won’t stick!
Step 2: Cream the Base
In a large mixing bowl, combine 2 large eggs, 1 cup of peanut butter, ¾ cup of light brown sugar, ¼ cup of granulated sugar, and 1 teaspoon of vanilla extract. Whisk these ingredients together until the mixture is smooth and creamy—this should take about 1-2 minutes. You want a great foundation of flavor for your cookies!
Step 3: Combine Dry Ingredients
Next, gently fold in ¾ cup of old-fashioned oats, ½ teaspoon of baking soda, and ½ teaspoon of salt. Make sure everything is well combined, creating a thick, sticky dough. This step is crucial as it gives your Flourless Monster Cookies their delightful texture, blending everything into a wholesome mixture.
Step 4: Add Sweet Surprises
Now, it’s time to stir in the fun! Gently fold in ½ cup of mini M&Ms and ½ cup of semisweet chocolate chips into your dough. This adds delightful pops of color and flavor to your cookies. Aim for an even distribution, so every bite of your cookie is a sweet adventure!
Step 5: Scoop and Space
Use a cookie scoop or tablespoon to portion the dough onto the prepared baking sheet, spacing them about 2 inches apart. You should have about 24 mounds of dough; this spacing allows the cookies to spread while baking. Imagine the sweet aroma already wafting in your kitchen!
Step 6: Bake to Perfection
Slide the baking sheet into your preheated oven and bake for 10–12 minutes. Keep an eye on them—the edges should be set while the centers remain soft and slightly gooey. This is the perfect stage for your Flourless Monster Cookies, creating that tempting chewy texture!
Step 7: Cool Down
After baking, remove the cookies from the oven and let them cool on the baking sheet for about 5 minutes. This brief cooling time allows them to firm up slightly before you transfer them to a wire rack. Get ready for the moment when you can finally indulge in these scrumptious cookies!

Flourless Monster Cookies Variations
Feel free to get creative with your Flourless Monster Cookies and make them uniquely yours!
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Nut Butter Swap: Replace peanut butter with almond or cashew butter for a different flavor twist.
You’ll still enjoy the magical chewy texture while adding a nutty depth. -
Vegan Delight: Substitute eggs with flax eggs (1 tablespoon flaxseed meal + 2.5 tablespoons water) for a plant-based version.
This keeps the cookies moist and chewy while being completely egg-free! -
Lower Sugar: Use coconut sugar instead of brown and granulated sugars to reduce sugar content while adding a caramel flavor.
Your cookies will remain wonderfully sweet, but with a healthier touch! -
Add-Ins Galore: Mix in chopped nuts like walnuts or pecans for a delightful crunch alongside the chewy oats.
Experimenting with different nuts creates truly personalized bites that everyone can enjoy! -
Dried Fruits: Toss in some dried cranberries or apricots for a fruity burst that complements the chocolate.
This adds exciting color and natural sweetness to your cookies while enticing the taste buds! -
Spicy Heat: Incorporate a pinch of cayenne pepper or crushed red pepper flakes for a surprising kick!
This unique twist elevates your cookies and balances the sweetness beautifully—perfect for adventurous eaters! -
Coconut Flakes: For a tropical vibe, add shredded coconut to the dough for extra chew and pleasant coconut flavor.
Each bite will transport you to a beachy paradise and add a delightful texture! -
Chocolate Lovers: Double the chocolate chips or replace semisweet ones with dark chocolate for rich, indulgent cookies.
Adding more chocolate makes each cookie a dream come true for any chocolate fanatic!
Enjoy exploring these variations and making your Flourless Monster Cookies even more scrumptious!
How to Store and Freeze Flourless Monster Cookies
Room Temperature: Store baked Flourless Monster Cookies in an airtight container at room temperature for up to 5 days to maintain their delicious chewiness.
Fridge: If you want to keep the dough fresh, it can be stored in the refrigerator for up to 3 days. Just make sure it's tightly wrapped!
Freezer: For long-term storage, freeze the cookie dough in individual portions. Wrap each ball in plastic wrap and place them in a freezer-safe bag for up to 3 months.
Reheating: To enjoy your cookies warm and gooey again, simply place them in the microwave for about 10-15 seconds. You’ll be rewarded with that freshly-baked taste!
What to Serve with Flourless Monster Cookies
There’s something irresistibly cozy about pairing these delightful cookies with complementary treats that enhance your family baking experience.
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Glass of Milk: This classic pairing helps balance the sweetness, making every bite even more satisfying. It’s a nostalgic choice that brings comfort, evoking memories of childhood snacks.
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Vanilla Ice Cream: A scoop of creamy vanilla ice cream adds a luscious contrast to the chewy cookies, creating an indulgent dessert experience. The melty texture pairs beautifully with the warm cookies, perfect for a decadent treat!
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Fresh Berries: A handful of fresh strawberries or raspberries adds a burst of tartness that cuts through the richness of the cookies. Plus, their vibrant colors elevate any dessert platter!
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Chocolate Drizzle: A light drizzle of melted chocolate over the cookies can turn them into a spectacular centerpiece. It adds richness and extra sweetness, perfect for those who can't get enough chocolate.
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Nutty Brownies: Pairing these cookies with a small plate of fudgy brownies for a double dessert delight will surely impress your guests. This combo provides a fun texture contrast, combining chewy, fudgy, and crunchy elements.
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Chilled Lemonade: Refresh your palate with a chilled glass of lemonade. Its bright citrus flavor provides a refreshing balance to the sweet, nutty cookies. Enjoying this pairing during warm outdoor gatherings makes it even more delightful!
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Coffee or Espresso: For adults, a warm cup of coffee or a rich shot of espresso enhances the flavors of the peanut butter and chocolate in the cookies. The bitter notes offer a sophisticated twist that’s perfect for an afternoon treat.
These Flourless Monster Cookies are delicious on their own, but pairing them with these options creates a delightful experience that will keep your family coming back for more!
Make Ahead Options
These Flourless Monster Cookies are perfect for meal prep enthusiasts! You can prepare the cookie dough up to 3 days in advance by refrigerating it. To do this, simply follow the entire recipe up to the scooping step, then cover the bowl with plastic wrap and store it in the fridge. When you're ready to indulge, scoop the chilled dough onto your baking sheet, and bake as directed, adding a minute or two to the baking time if the dough is particularly cold. Alternatively, you can freeze the uncooked dough for up to 3 months. Just scoop the dough onto a baking sheet, freeze until solid, then transfer to an airtight container. When you're ready to bake, there's no need to thaw; just pop them in the oven, and you'll have warm, freshly baked Flourless Monster Cookies ready to delight your family!
Expert Tips for Flourless Monster Cookies
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Quality Peanut Butter: Choose a natural peanut butter without additives for the best flavor and texture. This ensures your Flourless Monster Cookies have that creamy richness.
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Measure Carefully: Always use measuring cups for accuracy, especially for the sugars. Too much can make the cookies overly sweet or change their texture.
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Don’t Overmix: Once you add the dry ingredients, mix just until combined. Overmixing can lead to tough cookies instead of the tender chewiness we love.
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Watch Your Bake Time: Keep an eye on your cookies as they bake. Pull them out when the edges are set but the centers are still soft for that perfect chew that Flourless Monster Cookies are known for.
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Store Properly: To keep your cookies fresh, store them in an airtight container at room temperature. If you have leftovers, they won’t last long, but can stay fresh for up to 5 days!

Flourless Monster Cookies Recipe FAQs
What type of peanut butter works best?
Absolutely! I recommend using a natural peanut butter that contains only peanuts and salt. Avoid those with added sugars or oils, as they can alter the flavor and texture of your Flourless Monster Cookies. A creamy variety provides a smoother dough, while crunchy adds delightful texture, so choose based on your preference!
How should I store the baked cookies?
For optimal freshness, store your baked Flourless Monster Cookies in an airtight container at room temperature. They should stay delicious for up to 5 days! If you notice any hardening, try adding a slice of bread to the container to help retain moisture.
Can I freeze the cookie dough?
Yes, you can! To freeze your Flourless Monster Cookie dough, scoop individual portions onto a baking sheet and freeze them until solid, about 1-2 hours. Once frozen, wrap each dough ball in plastic wrap and place them in a freezer-safe bag for up to 3 months. When you're ready to bake, there's no need to thaw—just pop them right into the oven and add an extra minute or two to the bake time!
What should I do if my cookies are too dry?
If you find that your Flourless Monster Cookies turn out on the dry side, there may have been a bit too much peanut butter or sugar added. To troubleshoot for next time, consider using slightly less peanut butter for a still-delicious result. Don't forget to keep an eye on the baking time — removing them promptly when the edges are set but the centers are still soft will help achieve that perfect chewy texture.
Are these cookies safe for pets?
While Flourless Monster Cookies are delightful for humans, they're not pet-friendly. Particularly, the chocolate and sugar content is harmful to dogs and other pets. Always share the love with your furry friends by offering them a safe treat made specifically for them!

Irresistibly Chewy Flourless Monster Cookies Made Easy
Ingredients
Equipment
Method
- Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper.
- In a large mixing bowl, combine the eggs, peanut butter, light brown sugar, granulated sugar, and vanilla extract. Whisk until smooth and creamy.
- Gently fold in the old-fashioned oats, baking soda, and salt, creating a thick dough.
- Stir in the mini M&Ms and chocolate chips until evenly distributed.
- Scoop dough onto the prepared baking sheet, spacing them 2 inches apart.
- Bake for 10–12 minutes until edges are set and centers are slightly gooey.
- Allow to cool on the baking sheet for 5 minutes before transferring to a wire rack.





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