If you’re on the lookout for a sweet treat that combines the best of cookies and candy without the hassle of baking, then look no further! These No Bake Monster Cookies are a delightful mix of peanut butter, oats, chocolate, and colorful M&Ms that will satisfy your sweet tooth in no time. Perfect for any occasion, these cookies are easy to whip up and even easier to devour. With a rich, chewy texture and a burst of flavor in every bite, they are sure to become a favorite in your household.
What You’ll Love About This Recipe

- No baking required: Just mix, chill, and enjoy!
- Quick and easy: Perfect for last-minute gatherings.
- Kid-friendly: A fun recipe to make with little ones.
- Customizable: Add or swap out ingredients to suit your taste.
- Deliciously chewy: The combination of peanut butter and oats creates a satisfying texture.
What You’ll Need
- 6 tablespoons butter (softened)
- 6 tablespoons sugar
- ½ cup brown sugar
- ½ cup creamy peanut butter
- 6 tablespoons quick cooking oats (pulsed in food processor)
- 1 teaspoon vanilla extract
- ½ teaspoon salt
- 1 cup quick cooking oats (not pulsed in the food processor)
- 10 tablespoons miniature M&Ms (divided into 8 tablespoons and 2 tablespoons)
- 1 cup semi-sweet chocolate chips
- 3 tablespoons heavy cream
What You’ll Need (Gear)
- Mixing bowl: For combining all your ingredients.
- Spatula: To mix and scoop your cookie dough.
- Baking sheet or tray: To set your cookies to chill.
- Parchment paper: Optional, for easy cleanup.
- Food processor: To pulse the oats for a finer texture.
Method: No Bake Monster Cookies

Step 1: Prepare Your Ingredients
Begin by gathering all your ingredients and equipment. Make sure your butter is softened for easy mixing.
Step 2: Mix the Butters and Sugars
In a large mixing bowl, combine the softened butter, sugar, brown sugar, and creamy peanut butter. Mix well until the mixture is smooth and creamy.
Step 3: Add the Oats and Flavorings
Stir in the pulsed quick cooking oats, vanilla extract, and salt until everything is well combined. The mixture should be thick and sticky.
Step 4: Fold in the Remaining Ingredients
Gently fold in the remaining quick cooking oats, miniature M&Ms (8 tablespoons), semi-sweet chocolate chips, and heavy cream. Ensure everything is evenly distributed throughout the mixture.
Step 5: Form the Cookies
Using a spatula or your hands, scoop out tablespoon-sized portions of the mixture and shape them into balls or drop them onto a baking sheet lined with parchment paper.
Step 6: Chill the Cookies
Once all cookies are formed, sprinkle the remaining 2 tablespoons of M&Ms on top for decoration. Place the baking sheet in the refrigerator for at least 30 minutes to allow the cookies to set.
Step 7: Serve and Enjoy!
After chilling, remove the cookies from the refrigerator. Serve them cold and enjoy the delightful combination of flavors and textures!
Seasonal Twists

- Holiday Cheer: Add festive sprinkles or swap M&Ms for seasonal candies during the holidays.
- Nutty Delight: Incorporate chopped nuts like pecans or walnuts for added crunch.
- Fruit Fusion: Mix in dried fruits like cranberries or raisins for a fruity twist.
- Chocolate Overload: Use chocolate peanut butter or add more chocolate chips for a richer flavor.
If You’re Curious
These No Bake Monster Cookies are not only a delicious treat but also a great way to get creative in the kitchen. The base recipe is incredibly forgiving—feel free to experiment with various mix-ins or flavorings. The combination of oats and peanut butter provides a hearty texture, while the chocolate and M&Ms offer a sweet contrast. The best part? You can enjoy them without turning on the oven!
Meal Prep & Storage Notes
- Store the cookies in an airtight container in the refrigerator for up to a week.
- For longer storage, freeze the cookies in a single layer, then transfer to a freezer-safe bag for up to three months.
- Allow frozen cookies to thaw in the refrigerator before enjoying.
FAQ
Can I use natural peanut butter instead of creamy peanut butter?
Yes, but keep in mind that natural peanut butter tends to be more runny. You may need to adjust the amount of oats or add a bit more heavy cream to achieve the right consistency.
Can I use old-fashioned oats instead of quick cooking oats?
Yes, but be aware that old-fashioned oats will create a chewier texture. You may want to pulse them in a food processor for a finer consistency.
What can I substitute for M&Ms?
Feel free to substitute M&Ms with chocolate chunks, dried fruit, or any other candy of your choice for a unique twist on the classic recipe.
How do I know when the cookies are set?
The cookies will firm up after chilling in the refrigerator. They should be firm to the touch but still soft and chewy in the center when you bite into them.
More Recipes You’ll Love
- Peanut Butter Chocolate Chip Energy Bites
- No Bake Chocolate Oatmeal Cookies
- Chewy Granola Bars with Dried Fruit
- Chocolate Peanut Butter Banana Smoothie
Final Bite
These No Bake Monster Cookies are the perfect blend of sweet and salty, chewy and crunchy. They are a fantastic treat for any occasion, whether you’re hosting a gathering or simply want to indulge in something delicious. With minimal effort and just a few ingredients, you can whip up a batch of these delightful cookies that everyone will love. So grab your ingredients and get ready to enjoy a cookie experience like no other!

No Bake Monster Cookies
Equipment
- Mixing Bowl
- Spatula
- Baking Sheet
- Parchment Paper
- Food Processor
Ingredients
- 6 tablespoons butter softened
- 6 tablespoons sugar
- ½ cup brown sugar
- ½ cup creamy peanut butter
- 6 tablespoons quick cooking oats pulsed in food processor
- 1 teaspoon vanilla extract
- ½ teaspoon salt
- 1 cup quick cooking oats not pulsed in the food processor
- 10 tablespoons miniature M&Ms divided into 8 tablespoons and 2 tablespoons
- 1 cup semi-sweet chocolate chips
- 3 tablespoons heavy cream
Instructions
No Bake Monster Cookies
- Begin by gathering all your ingredients and equipment. Make sure your butter is softened for easy mixing.
- In a large mixing bowl, combine the softened butter, sugar, brown sugar, and creamy peanut butter. Mix well until the mixture is smooth and creamy.
- Stir in the pulsed quick cooking oats, vanilla extract, and salt until everything is well combined. The mixture should be thick and sticky.
- Gently fold in the remaining quick cooking oats, 8 tablespoons of miniature M&Ms, semi-sweet chocolate chips, and heavy cream. Ensure everything is evenly distributed throughout the mixture.
- Using a spatula or your hands, scoop out tablespoon-sized portions of the mixture and shape them into balls or drop them onto a baking sheet lined with parchment paper.
- Once all cookies are formed, sprinkle the remaining 2 tablespoons of M&Ms on top for decoration. Place the baking sheet in the refrigerator for at least 30 minutes to allow the cookies to set.
- After chilling, remove the cookies from the refrigerator. Serve them cold and enjoy the delightful combination of flavors and textures!
Notes
- Store cookies in an airtight container in the refrigerator for up to a week.
- Freeze cookies in a single layer, then transfer to a freezer-safe bag for up to three months.
- Allow frozen cookies to thaw in the refrigerator before enjoying.
