Baking can be a wonderful way to bring a little joy into your day, especially when it involves the comforting taste of cookies. This recipe comes together quickly, making it a delightful retreat during busy afternoons. With a mix of flavors and textures, these cookies are a satisfying treat. You’ll find that each bite is packed with the sweetness of chocolate and the crunch of M&Ms, creating a joyful experience.
Why This Gluten Free Flourless Monster Cookies Works
These cookies are reliable because they require just a handful of familiar ingredients that blend seamlessly. The peanut butter adds creaminess and richness, while the combination of white and brown sugars brings a perfect balance of sweetness. The oats provide a chewy texture that’s hard to resist, and the chocolate chips and M&Ms lend pops of flavor that make each bite fun and exciting.
Kitchen Tools for Gluten Free Flourless Monster Cookies
- Electric mixer
- Mixing bowls
- Baking sheet
- Parchment paper
- Cookie scoop
Ingredients
- ¼ cup unsalted butter, softened
- ½ cup white sugar
- ½ cup brown sugar
- ¾ cup peanut butter
- 1 egg
- 1 egg yolk
- 2 teaspoons vanilla
- 2 cups gluten free quick oats
- 1 teaspoon baking soda
- ¼ teaspoon salt
- ½ cup chocolate chips
- ½ cup mini m&ms

How to Make Gluten Free Flourless Monster Cookies
Step 1. Start by preheating your oven to 350 degrees Fahrenheit. This ensures an even baking environment for your cookies. While the oven heats, take a baking sheet and line it with parchment paper to prevent sticking and for easy cleanup later.
Step 2. In a mixing bowl, combine the softened butter with the white sugar and brown sugar. Using your electric mixer, beat these ingredients together for about a minute until the mixture is smooth and creamy. This step helps to incorporate air into the batter, leading to a more tender cookie.
Step 3. Next, add the peanut butter, egg, egg yolk, and vanilla extract to the bowl. Mix these ingredients for an additional 30 seconds until everything is well combined. You should have a creamy, slightly thick mixture at this point.
Step 4. Begin adding the gluten free quick oats, baking soda, and salt into the mixture. Use a spatula or spoon to gently mix these dry ingredients into the wet ones until just combined. The dough will begin to take on a more substantial texture, indicative of the hearty oats.
Step 5. Now it’s time to fold in the chocolate chips and mini M&Ms. Be gentle but thorough, ensuring that these sweet treats are evenly distributed throughout the dough. This will ensure that each cookie is delightfully packed with flavor.
Step 6. Using a 2 tablespoon cookie scoop, scoop out portions of dough and form them into balls. When you do this, gently smoosh the dough together to make sure the chocolate chips and M&Ms are well integrated. Place the cookie balls onto your prepared baking sheet, spacing them a bit apart, as they will spread while baking. Aim for no more than nine cookies per batch to allow room for expansion.
Step 7. Slide the baking sheet into the preheated oven. Keep an eye on the cookies, baking them until they are just set and look firm on the edges. They will continue to firm up as they cool, so don’t overbake them.
Step 8. Once done, allow the cookies to cool completely on the baking sheet before serving. This cooling process helps them maintain their shape and gives you that perfect chewy texture.

Serving Ideas for Gluten Free Flourless Monster Cookies
These cookies make a fantastic snack to enjoy with a glass of milk or your favorite coffee. They’re also great to share at gatherings or as an afternoon treat for kids. If you have leftovers, they store nicely in an airtight container. They’ll last a few days at room temperature, allowing everyone to enjoy them over time.
Practical Tips for Gluten Free Flourless Monster Cookies
- Ensure your butter is softened for easy mixing.
- Be careful not to over-bake, as these cookies will continue to firm as they cool.
- Use gluten-free oats to maintain the integrity of the recipe.
- Smooshing the dough together helps distribute the mix-ins evenly.
- Store cookie dough in the fridge if you want to bake a few cookies at a time.
- Keep your baking sheets cool between batches to prevent the dough from melting too quickly.
Common Mistakes to Avoid
- Not softening the butter: If your butter is too hard, it won’t combine well with the sugars, resulting in a lumpy batter. Make sure the butter is softened for smoother mixing.
- Overbaking the cookies: Cookies that are left in the oven too long may turn hard instead of chewy. Bake them until just set for the best texture.
- Skipping the cooling time: If you eat them right off the baking sheet, they might fall apart. Allow them to cool completely to help maintain their shape.
- Not measuring ingredients accurately: Precision matters in baking. Use measuring cups carefully to ensure the balance of flavors and textures.
- Too many cookies on one sheet: Placing too many cookies together can lead to uneven baking and spread. Stick to the recommended amount for best results.
- Forgetting to fold the mix-ins: If you don’t fold in the chocolate chips and M&Ms, you won’t get that delightful burst of flavor in every bite. Be sure to incorporate them evenly.
Simple Variations
While this recipe is delicious as is, you could consider swapping out different mix-ins like shredded coconut or various nuts, if you want to experiment while still keeping it true to the original monster cookie vibe. Just be sure any additions stay within the overall balance inspired by the original ingredients.
Storage & Reheating
Store these cookies in an airtight container at room temperature for up to a week for the best texture. If you’d like to keep them longer, they freeze well. Just place them in a freezer bag, and they will last for a few months. To reheat, pop them in the microwave for a few seconds until warm, which will bring back a bit of that freshly baked goodness.
Frequently Asked Questions
Can I make this recipe ahead of time?
Yes, you can prepare the dough and refrigerate it for a few hours or even overnight. This makes it easier to bake fresh cookies when you’re ready.
How long does it last in the fridge?
These cookies can be stored in the fridge for up to a week in an airtight container.
Can I freeze this recipe?
Absolutely! They freeze well, just ensure they are in a sealed container or freezer bag.
What can I substitute for one ingredient?
If you need to make adjustments, ensure the core structure remains, such as keeping the peanut butter to maintain texture.
Why didn’t my recipe turn out as expected?
Often it’s due to baking time or ingredient measurement issues. Make sure to follow the steps closely and check for doneness by their appearance.
Final Thoughts
Baking these gluten free flourless monster cookies brings back a sense of childhood joy and simplicity. They are easy to pull together with ingredients you might already have at home and create a comforting treat enjoyed by everyone. Each bite bursts with flavor and texture, making the experience all the more delightful. Enjoy them fresh, share with loved ones, and savor the moments they create in your kitchen.

Gluten Free Flourless Monster Cookies
Ingredients
For the cookie dough
- ¼ cup unsalted butter, softened Ensure the butter is softened for easy mixing.
- ½ cup white sugar
- ½ cup brown sugar
- ¾ cup peanut butter Maintains texture and flavor.
- 1 large egg
- 1 large egg yolk
- 2 teaspoons vanilla extract
- 2 cups gluten free quick oats Use gluten-free oats to maintain the integrity of the recipe.
- 1 teaspoon baking soda
- ¼ teaspoon salt Enhances flavor.
- ½ cup chocolate chips For added sweetness.
- ½ cup mini M&Ms Adds a fun pop of color and flavor.
Instructions
Preparation
- Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper.
- In a mixing bowl, combine the softened butter, white sugar, and brown sugar. Beat until smooth and creamy.
- Add the peanut butter, egg, egg yolk, and vanilla extract. Mix until well combined.
- Gently fold the gluten-free oats, baking soda, and salt into the mixture until just combined.
- Fold in the chocolate chips and mini M&Ms until evenly distributed.
- Using a cookie scoop, form dough balls and place them on the prepared baking sheet, spacing them apart.
Baking
- Bake in the preheated oven for about 10 minutes or until just set and edges look firm.
- Allow cookies to cool completely on the baking sheet before serving.


