Monster Cookies are more than just a treat; they’re an experience. These colossal, chewy cookies packed with a riot of textures and flavors are a guaranteed crowd-pleaser, evoking childhood joy and pure, unadulterated delight with every bite. What is it about these behemoths that captures our hearts (and stomachs)? Perhaps it’s the sheer indulgence, the delightful chaos of M&M’s, chocolate chips, and crunchy oats all mingling together. Or maybe it’s the fact that they’re so wonderfully forgiving – a little extra of this or a dash more of that rarely ruins a batch, making them perfect for bakers of all skill levels. These aren’t your average, dainty cookies; these are bold, unapologetic bursts of deliciousness that bring smiles to faces, making them a cherished favorite for bake snon-alcoholic ales, birthday parties, or simply an afternoon pick-me-up. Get ready to unleash your inner cookie monster with this sensational recipe!
Ingredients:
- ½ cup (113g) unsalted butter, softened to room temperature
- 1 cup (200g) light brown sugar, packed firmly into the measuring cup
- ¼ cup (50g) granulated sugar
- ⅓ cup (approximately 85g) smooth peanut butter, at room temperature
- 1 large egg, at room temperature
- 1 additional egg yolk, at room temperature
- 2 teaspoons pure vanilla extract
- 2 teaspoons pure maple syrup
- 1 cup (115g) old-fashioned rolled oats (not instant or quick oats)
- 1¼ cups (155g) all-purpose flour, spooned into the measuring cup and leveled off with a straight edge
- 1 teaspoon baking soda
- ½ teaspoon baking powder
- ½ teaspoon kosher salt
- ¾ cup (approximately 130g) semi-sweet chocolate chips, plus extra for decorating the tops of the cookies
- ¾ cup (approximately 135g) M&M candies, plus extra for decorating the tops of the cookies
Preparing the Cookie Dough
Creaming the Butter and Sugars
In a large mixing bowl, or the bowl of your stand mixer fitted with the paddle attachment, combine the softened unsalted butter, packed light brown sugar, and granulated sugar. Begin extract by creaming these ingredients together on medium speed for about 2 to 3 minutes. You’re looking for a light and fluffy mixture, where the sugars are well incorporated into the butter. This step is crucial for developing a tender cookie texture. If you’re mixing by hand, this will require a good deal of arm power, so be patient. Scrape down the sides of the bowl occasionally to ensure everything is evenly combined.
Adding Wet Ingredients and Peanut Butter
Once the butter and sugar mixture is light and fluffy, it’s time to incorporate the wet ingredients. Add the smooth peanut butter to the bowl. Continue to mix on medium speed until the peanut butter is fully incorporated and the mixture looks smooth and creamy. Next, add the room temperature large egg and the egg yolk, one at a time, mixing well after each addition until just combined. Be careful not to overmix at this stage. Then, stir in the pure vanilla extract and the pure maple syrup. The maple syrup adds a subtle depth of flavor that really complements the other ingredients. Mix until everything is just combined and the batter is smooth.
Incorporating Dry Ingredients and Mix-ins
Combining Dry Ingredients
In a separate medium bowl, whisk together the all-purpose flour, baking soda, baking powder, and kosher salt. Whisking these dry ingredients separately helps to distribute the leavening agents and salt evenly throughout the flour, which will lead to more consistent cookie rise and flavor. This pre-mixing step is a small effort that makes a big difference.
Combining Wet and Dry Mixtures
Gradually add the dry ingredient mixture to the wet ingredients in the large bowl. Mix on low speed, or stir with a sturdy spoon, until just combined. It’s important not to overmix the dough once the flour is added, as this can develop the gluten in the flour too much and result in tough cookies. You should still see a few streaks of flour when you stop mixing, and then gently fold them in with a spatula until no dry streaks remain.
Adding the Monster Cookie Goodies
Now for the fun part! Add the ¾ cup of semi-sweet chocolate chips and ¾ cup of M&M candies to the dough. Gently fold them in with a rubber spatula until they are evenly distributed throughout the cookie dough. You want to distribute them as evenly as possible so that each cookie gets a good mix of both. Reserve a small handful of extra chocolate chips and M&Ms for pressing into the tops of the cookies before baking, which gives them that extra appealing, homemade look.
Shaping and Baking the Monster Cookies
Chilling the Dough (Optional but Recommended)
For best results and to prevent excessive spreading, I highly recommend chilling the cookie dough. Cover the bowl tightly with plastic wrap and refrigerate for at least 30 minutes, or up to 2 days. Chilling the dough allows the fats to firm up, which helps the cookies hold their shape better during baking and results in a chewier cookie. If you’re short on time, you can skip this step, but be aware the cookies might spread a bit more.
Scooping and Shaping the Cookies
Preheat your oven to 350°F (175°C). Line baking sheets with parchment paper or silicone baking mats to prevent sticking. Using a medium-sized cookie scoop (about 1.5 to 2 tablespoons), scoop balls of dough onto the prepared baking sheets, leaving about 2 inches of space between each cookie to allow for spreading. If you haven’t chilled the dough, the scoops might be a bit softer. Gently roll each scoop into a round ball. If you chilled the dough, you can press a few extra chocolate chips and M&Ms onto the tops of each dough ball to make them look extra enticing.
Baking to Perfection
Bake the cookies for 9 to 12 minutes, or until the edges are golden brown and set, but the centers still look slightly soft and underbaked. The cookies will continue to cook and firm up on the baking sheet after you remove them from the oven. For perfectly chewy cookies, it’s better to slightly underbake them than to overbake them. Ovens can vary, so keep an eye on your first batch to determine the ideal baking time for your oven.
Cooling the Cookies
Once baked, let the cookies cool on the baking sheets for 5 to 10 minutes before carefully transferring them to a wire rack to cool completely. This cooling period on the baking sheet is important because it allows the cookies to set properly before you move them. Attempting to move them too soon can cause them to break apart. Once completely cooled, they are ready to be enjoyed! Store any leftover cookies in an airtight container at room temperature for up to 3-4 days.

Conclusion:
And there you have it – your very own batch of delicious Monster Cookies! I hope you enjoyed this journey into creating these delightful treats. They are truly a crowd-pleaser, perfect for bake snon-alcoholic ales, birthday parties, or simply as an afternoon pick-me-up. The combination of chewy oats, sweet chocolate chips, and the playful burst of candy add a unique and satisfying texture and flavor that makes these Monster Cookies so special. Remember, the beauty of this recipe lies in its adaptability, so don’t hesitate to experiment and make them your own!
I love serving these Monster Cookies with a cold glass of milk or a hot cup of coffee. They also make a fantastic dessert when crum extractbled over ice cream or layered into a trifle. For a fun twist, consider adding white chocolate chips, chopped nuts, or even a swirl of peanut butter to the dough. The possibilities are endless, and the result is always a joyful, colorful, and utterly delicious cookie. So go ahead, embrace the fun, and bake up a storm!
Frequently Asked Questions about Monster Cookies:
Q1: Can I make Monster Cookies gluten-free?
Absolutely! To make gluten-free Monster Cookies, simply substitute the all-purpose flour with a gluten-free all-purpose flour blend. Ensure that your oats are certified gluten-free as well, as oats can sometimes be cross-contaminated during processing. The rest of the ingredients should remain the same.
Q2: How long do Monster Cookies stay fresh?
When stored in an airtight container at room temperature, these Monster Cookies will stay fresh and delicious for about 3-5 days. For longer storage, you can freeze them. Place them in a single layer on a baking sheet until firm, then transfer them to a freezer-safe bag or container. They can be kept frozen for up to 3 months.

Easy Monster Cookies – The Ultimate Sweet Treat
Delicious and easy-to-make monster cookies packed with chocolate chips and M&Ms for a fun and satisfying treat.
Ingredients
-
½ cup (113g) unsalted butter, softened to room temperature
-
1 cup (200g) light brown sugar, packed firmly into the measuring cup
-
¼ cup (50g) granulated sugar
-
⅓ cup (approximately 85g) smooth peanut butter, at room temperature
-
1 large egg, at room temperature
-
1 additional egg yolk, at room temperature
-
2 teaspoons pure vanilla extract
-
2 teaspoons pure maple syrup
-
1 cup (115g) old-fashioned rolled oats
-
1¼ cups (155g) all-purpose flour, spooned into the measuring cup and leveled off
-
1 teaspoon baking soda
-
½ teaspoon baking powder
-
½ teaspoon kosher salt
-
¾ cup (approximately 130g) semi-sweet chocolate chips, plus extra for decorating the tops of the cookies
-
¾ cup (approximately 135g) M&M candies, plus extra for decorating the tops of the cookies
Instructions
-
Step 1
Cream together softened unsalted butter, packed light brown sugar, and granulated sugar in a large mixing bowl on medium speed for about 2 to 3 minutes until light and fluffy. Scrape down the sides of the bowl occasionally. -
Step 2
Add smooth peanut butter to the butter and sugar mixture and mix until fully incorporated. Beat in the large egg and egg yolk one at a time, mixing well after each addition. Stir in the pure vanilla extract and pure maple syrup until just combined. -
Step 3
In a separate bowl, whisk together all-purpose flour, baking soda, baking powder, and kosher salt. Gradually add the dry ingredients to the wet ingredients and mix on low speed or stir until just combined. Do not overmix. -
Step 4
Gently fold in the semi-sweet chocolate chips and M&M candies until evenly distributed. Reserve some extra chocolate chips and M&Ms for decorating. -
Step 5
Preheat your oven to 350°F (175°C). Line baking sheets with parchment paper or silicone mats. Scoop balls of dough onto the prepared baking sheets, leaving about 2 inches of space between cookies. Optionally, press extra chocolate chips and M&Ms onto the tops of each dough ball. -
Step 6
Bake for 9 to 12 minutes, or until the edges are golden brown and set, but the centers still look slightly soft. Let cookies cool on the baking sheets for 5 to 10 minutes before transferring to a wire rack to cool completely.
Important Information
Nutrition Facts (Per Serving)
It is important to consider this information as approximate and not to use it as definitive health advice.
Allergy Information
Please check ingredients for potential allergens and consult a health professional if in doubt.




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