Monster Cookies Recipe- Chewy Delicious Fun
Monster Cookies are more than just a delightful treat; they’re a nostalgic journey back to childhood, a testament to creative baking, and a guaranteed crowd-pleaser for all ages. What makes these cookies so universally loved? It’s their utterly chaotic yet perfectly harmonious blend of textures and flavors. Each bite is an adventure, a delightful surprise waiting to unfold. Forget perfectly uniform cookies; the beauty of Monster Cookies lies in their magnificent, unapologetic messiness. They’re packed with a generous abundance of chocolate chips, peanut butter, oats, and often, M&Ms or other colorful candies, creating a sensory explosion that’s both comforting and exhilarating. This isn’t just any cookie; it’s a celebration of indulgence and fun, a testament to the fact that sometimes, more is indeed more when it comes to deliciousness. Get ready to whip up a batch of these iconic delights that are as fun to make as they are to devour!

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 (about 85g) smooth peanut butter, also at room temperature for easy mixing
- 1 large egg, at room temperature
- 1 egg yolk, at room temperature
- 2 teaspoons pure vanilla extract
- 2 teaspoons pure maple syrup (this adds a lovely depth of flavor)
- 1 cup (115g) old-fashioned rolled oats (not instant or quick-cooking oats, as they have a different texture)
- 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 (using kosher salt provides a cleaner salt flavor than table salt)
- ¾ cup (about 130g) semi-sweet chocolate chips, plus extra for pressing onto the tops of the cookies
- ¾ cup (about 135g) M&M’s candies, plus extra for decorating the tops of the cookies
Mixing the Dough
Creaming the Butter and Sugars
Start by creaming together your softened unsalted butter, packed light brown sugar, and granulated sugar in a large mixing bowl. Use an electric mixer (handheld or stand mixer) on medium speed. Beat them together for about 2 to 3 minutes, until the mixture is light and fluffy. This aeration process is crucial for a tender cookie texture, as it incorporates air into the dough. Scrape down the sides of the bowl a couple of times during this step to ensure everything is evenly incorporated.
Adding Wet Ingredients
Next, add your smooth peanut butter to the creamed butter and sugar mixture. Continue mixing on medium speed until it’s well combined, which should take about another minute. Now, it’s time to add the eggs and vanilla. Add the room temperature large egg and the extra egg yolk, along with the pure vanilla extract and the maple syrup. Beat again on medium speed until everything is thoroughly incorporated and the mixture is smooth and slightly lighter in color. Don’t overmix at this stage; just ensure all the wet ingredients are fully blended into the dough.
Incorporating Dry Ingredients
In a separate medium bowl, whisk together your all-purpose flour, baking soda, baking powder, and kosher salt. Whisking these dry ingredients together ensures that the leavening agents (baking soda and baking powder) and salt are evenly distributed throughout the flour, which will lead to consistent cookie rise and flavor. Gradually add this dry ingredient mixture to the wet ingredients in your large mixing bowl. Mix on low speed until just combined. It’s important not to overmix here, as overmixing can develop the gluten in the flour, resulting in tough cookies. Stop mixing as soon as you no longer see streaks of flour.
Folding in the Mix-Ins
Now comes the fun part! Add the old-fashioned rolled oats, semi-sweet chocolate chips, and M&M candies to the dough. Use a sturdy spatula or wooden spoon to gently fold these ingredients into the dough until they are evenly distributed. Be careful not to crush the M&M’s or chocolate chips as you mix. Reserve a small handful of extra chocolate chips and M&M’s for decorating the tops of your cookies later. The dough will be quite thick and chunky at this point, which is exactly what you want for these substantial cookies.
Baking the Monster Cookies
Chilling the Dough (Optional but Recommended)
For the best results, cover the bowl of cookie dough with plastic wrap and refrigerate it for at least 30 minutes, or up to 24 hours. Chilling the dough allows the fats to firm up, which helps the cookies spread less during baking, resulting in thicker, chewier cookies with a more concentrated flavor. If you’re short on time, you can skip this step, but the cookies will spread a bit more.
Preheating and Preparing Baking Sheets
While the dough is chilling (or before you start scooping if you skipped chilling), preheat your oven to 350°F (175°C). Line two large baking sheets with parchment paper or silicone baking mats. This prevents the cookies from sticking and makes for easy cleanup. Make sure your baking sheets are not overcrowded, as you need to give the cookies space to spread slightly.
Scooping and Shaping the Cookies
Using a cookie scoop (about 2 tablespoons in size) or two spoons, portion out rounded balls of dough. Place them about 2 inches apart on the prepared baking sheets. Don’t worry about rolling them into perfectly smooth balls; the rustic shape adds to their charm. If you like, gently press a few extra semi-sweet chocolate chips and M&M’s onto the tops of each dough ball. This makes the cookies look even more appealing once they are baked.
Baking to Perfection
Bake the cookies in the preheated oven for 10 to 12 minutes, or until the edges are golden brown and the centers look slightly underbaked. The exact baking time will depend on your oven and the size of your cookies. For thicker, chewier cookies, it’s better to slightly underbake them. They will continue to cook and set up on the hot baking sheet after you remove them from the oven. Rotate the baking sheets halfway through the baking time (around the 5-6 minute mark) to ensure even baking if your oven has hot spots.
Cooling and Enjoying
Once baked, let the cookies cool on the baking sheets for 5 to 10 minutes before transferring them to a wire rack to cool completely. This allows them to firm up sufficiently so they don’t fall apart. Once cooled, these Monster Cookies 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 guide to creating the ultimate batch of Monster Cookies! We’ve walked through each step, from creaming the butter and sugar to that final delightful mix-in of chocolate chips and peanut butter. These cookies are a true crowd-pleaser, perfect for any occasion, from bake snon-alcoholic ales to lazy weekend afternoons. Their chewy texture, rich flavor, and fun, colorful appearance make them a guaranteed hit with kids and adults alike. Don’t be afraid to embrace the “monster” aspect and get creative with your additions!
For serving suggestions, these Monster Cookies are fantastic on their own, perhaps with a cold glass of milk. They also pair wonderfully with a scoop of vanilla ice cream for a decadent dessert. When it comes to variations, the possibilities are truly endless! Try adding M&M’s in different colors, switching out the chocolate chips for white chocolate or butterscotch, or even incorporating some chopped nuts if you don’t have any allergies to consider. You can also experiment with different extracts for a subtle flavor twist. So go forth, bake with joy, and enjoy every single delicious bite of your homemade Monster Cookies!
Frequently Asked Questions:
Q: My Monster Cookies spread too much and became flat. What went wrong?
A: This often happens when the dough is too warm or the butter is too soft. Ensure your butter is softened but not melted. Chilling the dough for at least 30 minutes before baking can also significantly help prevent excessive spreading and result in thicker, chewier cookies.
Q: Can I make Monster Cookies ahead of time?
A: Absolutely! You can prepare the cookie dough and store it in the refrigerator for up to 3 days, or freeze it for up to 3 months. If freezing, let the dough thaw in the refrigerator overnight before baking. Baked cookies will stay fresh in an airtight container at room temperature for about a week.

Monster Cookies
Chewy, delicious, and fun-to-make monster cookies loaded with chocolate chips and M&M’s.
Ingredients
-
½ cup (113g) unsalted butter, softened to room temperature
-
1 cup (200g) light brown sugar, packed
-
¼ cup (50g) granulated sugar
-
⅓ cup (about 85g) smooth peanut butter, room temperature
-
1 large egg, room temperature
-
1 egg yolk, 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
-
1 teaspoon baking soda
-
½ teaspoon baking powder
-
½ teaspoon kosher salt
-
¾ cup (about 130g) semi-sweet chocolate chips, plus extra for pressing onto tops
-
¾ cup (about 135g) M&M’s candies, plus extra for decorating tops
Instructions
-
Step 1
Cream together softened butter, light brown sugar, and granulated sugar in a large bowl with an electric mixer on medium speed for 2-3 minutes until light and fluffy. -
Step 2
Add peanut butter and mix until well combined. Then add the egg, egg yolk, vanilla extract, and maple syrup. Beat until thoroughly incorporated and smooth. -
Step 3
In a separate bowl, whisk together flour, baking soda, baking powder, and kosher salt. Gradually add the dry ingredients to the wet ingredients on low speed until just combined. Do not overmix. -
Step 4
Gently fold in the rolled oats, semi-sweet chocolate chips, and M&M candies until evenly distributed. Reserve a small handful of extra chips and candies for decorating. -
Step 5
Cover the dough and refrigerate for at least 30 minutes (optional, but recommended for thicker cookies). -
Step 6
Preheat oven to 350°F (175°C). Line baking sheets with parchment paper. -
Step 7
Scoop rounded balls of dough (about 2 tablespoons each) onto prepared baking sheets, about 2 inches apart. Press extra chocolate chips and M&M’s onto the tops if desired. -
Step 8
Bake for 10-12 minutes, or until the edges are golden brown and centers look slightly underbaked. Rotate baking sheets halfway through. -
Step 9
Let cookies cool on baking sheets for 5-10 minutes before transferring to a wire rack to cool completely. Store leftovers in an airtight container.
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.
