Making monster cookies is a fun way to whip up a batch of delicious treats that everyone will love. These cookies are loaded with oats, chocolate chips, and colorful candies, making them a perfect choice for any special occasion or just when you’re in the mood for a sweet snack. Whether you’re baking for a family gathering or simply want to indulge yourself, these cookies will bring smiles and satisfaction with every bite.

Why You’ll Love This Recipe
These monster cookies are fantastic because they are so easy to make. With a short list of ingredients and simple steps, they are perfect for beginner bakers and busy families alike. Kids will enjoy helping out in the kitchen, and everyone will appreciate the blend of chewy oats and chocolatey goodness. Plus, you can customize the mix-ins to suit your taste, making each batch unique!
Ingredients You’ll Need
Here’s what you’ll need to create these delightful cookies:
- 1 cup butter, softened
- 1 cup brown sugar
- 1/2 cup granulated sugar
- 2 large eggs
- 1 teaspoon vanilla extract
- 2 cups flour
- 1 teaspoon baking soda
- 1/2 teaspoon salt
- 1 cup oats
- 1 cup chocolate chips
- 1/2 cup M&Ms candies
Ingredient Notes, Variations & Simple Swaps
This recipe is flexible, allowing you to make adjustments based on what you have at home. You can substitute the chocolate chips with any other type of chocolate, like white chocolate or dark chocolate, for a different flavor. If you’d like to add extra texture, feel free to mix in chopped nuts. For a festive touch, consider using seasonal candies or sprinkles. The cookies can also be made gluten-free by using a gluten-free flour blend.
Equipment Needed
- Mixing bowls
- Baking sheet
- Parchment paper
- Electric mixer (or whisk)
- Cookie scoop or spoon
How to Make This Recipe
Step 1 – Preheat the Oven
Preheat your oven to 350°F (175°C). While the oven heats, you can prepare the cookie dough.
Step 2 – Mix the Wet Ingredients
In a large bowl, combine the softened butter, brown sugar, and granulated sugar. Use an electric mixer or whisk to beat them together until the mixture is creamy and smooth. Next, add the eggs and vanilla extract, mixing until everything is well combined.
Step 3 – Combine the Dry Ingredients
In another bowl, stir together the flour, baking soda, and salt. Gradually add this dry mixture to your wet ingredients, mixing until just combined. Be careful not to overmix, as this can make your cookies tough.
Step 4 – Fold in the Oats and Mix-ins
Now it’s time to add the fun! Gently fold in the oats, chocolate chips, and M&Ms candies until they’re evenly distributed throughout the dough.
Step 5 – Shape and Bake the Cookies
Drop spoonfuls of dough onto a baking sheet lined with parchment paper. Be sure to leave some space between each cookie. Bake them in the preheated oven for about 10-12 minutes, or until the edges are golden brown and the centers are slightly soft.
Step 6 – Cool and Enjoy
Once baked, allow the cookies to cool on the baking sheet for a few minutes before transferring them to a wire rack to cool completely. Now, enjoy these delightful cookies anytime!

Tips for Perfect Results
To ensure your monster cookies turn out perfectly, follow these tips:
- Use room temperature butter for easier mixing and a better texture.
- Don’t overmix once you add the dry ingredients to keep cookies soft.
- Let the dough rest for a few minutes before baking for a firmer texture.
- Experiment with different add-ins like dried fruits or other candies.
- Keep an eye on the baking time—cookies will continue to set as they cool.
Flavor Variations
If you want to vary the flavors of your monster cookies, consider trying the following ideas:
- Swap out chocolate chips for peanut butter chips for a nutty twist.
- Add a teaspoon of cinnamon to the dry ingredients for a warm spice flavor.
- Use coconut flakes in place of some oats for added chewiness.
- Mix in chopped dried fruits like cranberries or raisins for a fruity touch.
- Experiment with flavored baking chips, such as butterscotch or mint.
What to Serve With This Recipe
These monster cookies are delicious on their own, but they also pair well with:
- A glass of cold milk
- Hot cocoa or coffee for a cozy treat
- Ice cream for an extravagant dessert
- Fresh fruit for a refreshing side
Storage, Make-Ahead & Leftovers
You can store these cookies in an airtight container at room temperature for up to one week. If you want to keep them for longer, you can freeze the cookie dough. Scoop the dough onto a baking sheet and freeze until solid, then transfer to a freezer bag. When you’re ready to bake, let the dough thaw in the fridge overnight and bake as directed. For leftover cookies, simply reheat in the microwave for a few seconds to restore their freshness.

Monster Cookies
Ingredients
Wet Ingredients
- 1 cup butter, softened Use room temperature for easier mixing.
- 1 cup brown sugar
- 1/2 cup granulated sugar
- 2 large eggs
- 1 teaspoon vanilla extract
Dry Ingredients
- 2 cups flour Can use gluten-free flour blend.
- 1 teaspoon baking soda
- 1/2 teaspoon salt
Mix-ins
- 1 cup oats
- 1 cup chocolate chips Can substitute with any chocolate type.
- 1/2 cup M&Ms candies For a festive touch.
Instructions
Preparation
- Preheat your oven to 350°F (175°C).
- In a large bowl, combine the softened butter, brown sugar, and granulated sugar. Beat until creamy and smooth.
- Add the eggs and vanilla extract, mixing until well combined.
Mixing
- In another bowl, stir together the flour, baking soda, and salt.
- Gradually add the dry mixture to the wet ingredients, mixing until just combined.
- Be careful not to overmix.
Combining Ingredients
- Gently fold in the oats, chocolate chips, and M&Ms until evenly distributed.
Baking
- Drop spoonfuls of dough onto a baking sheet lined with parchment paper.
- Bake for about 10-12 minutes, until edges are golden brown and centers are slightly soft.
Cooling
- Allow cookies to cool on the baking sheet for a few minutes before transferring to a wire rack to cool completely.
Notes
Frequently Asked Questions About This Recipe
How can I make my cookies softer?
To soften your cookies, make sure you don’t overbake them. Removing them from the oven while they’re still slightly soft in the middle will help maintain their chewiness. You can also try adding an extra egg yolk for a softer texture.
Can I use a different type of flour?
Yes, you can use whole wheat flour or a gluten-free flour blend. Just keep in mind that the texture might vary slightly depending on what you choose.
How do I get my cookies to be uniform in size?
Using a cookie scoop or two spoons will help you create evenly sized dough balls, ensuring that they bake consistently.
Can I add nuts to these cookies?
Absolutely! Chopped nuts can add a delicious crunch. Just fold them in along with the oats and chocolate for a delightful texture contrast.
How long can I store the dough before baking?
You can store the cookie dough in the refrigerator for up to 3 days. Just cover it tightly to keep it fresh.
