Why You’ll Love Monster Cookies Recipe
Monster Cookies are fun, colorful, and packed with texture in every bite. The peanut butter gives them a rich, nutty base, while the oats make them extra chewy. M&M’s add crunch and color, and chocolate chips make the cookies feel extra indulgent.
They’re also easy to make in about 35 minutes, making them perfect for parties, bake sales, lunchbox treats, or a cozy homemade dessert.
Ingredients
(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)
- Unsalted butter, room temperature
- Creamy peanut butter
- Light brown sugar
- Granulated sugar
- Vanilla extract
- Molasses
- Large egg
- Baking soda
- Kosher salt
- Quick oats
- All-purpose flour or 1-to-1 gluten-free baking flour
- M&M’s
- Semisweet chocolate chips
- Flaky sea salt, optional
Directions
Preheat the oven to 350°F and line a large baking sheet with parchment paper.
In a large mixing bowl, beat the butter, peanut butter, brown sugar, and granulated sugar until light and fluffy. Scrape down the sides of the bowl as needed.
Mix in the vanilla extract, molasses, and egg until the mixture is smooth and creamy.
Add the baking soda, salt, and oats, then mix until evenly combined.
Add the flour and mix until it is about halfway incorporated. Fold in the M&M’s and chocolate chips with a rubber spatula until evenly distributed.
Scoop the dough into large portions and place 5 to 6 cookies on the prepared baking sheet, leaving room for spreading. Press a few extra candies or chocolate chips on top if desired.
Bake for 13 to 15 minutes, or until the edges are lightly golden and the centers still look slightly soft.
Sprinkle with flaky sea salt right after baking, if using. Let the cookies rest on the baking sheet for 1 minute, then transfer them to a cooling rack.
Enjoy warm, or let them cool completely before storing.
Servings and timing
This recipe makes about 15 large cookies.
Prep time: 20 minutes
Cook time: 15 minutes
Total time: 35 minutes
Servings: 15 cookies
Variations
Use dark chocolate chips instead of semisweet chocolate chips for a richer flavor.
Swap the M&M’s for peanut butter candies, chocolate chunks, or chopped chocolate bars.
Make them gluten-free by using certified gluten-free oats and a 1-to-1 gluten-free baking flour.
Add chopped peanuts or pecans for extra crunch.
Use seasonal M&M’s to match holidays, birthdays, or special occasions.
Storage/Reheating
Store cooled Monster Cookies in an airtight container at room temperature for up to 5 days.
To keep them soft, place a small piece of bread in the container with the cookies.
For longer storage, freeze the baked cookies in a freezer-safe bag or container for up to 2 months. Thaw at room temperature before serving.
To reheat, warm a cookie in the microwave for about 8 to 10 seconds to bring back its soft, fresh-baked texture.
FAQs
Can I make Monster Cookies gluten-free?
Yes. Use certified gluten-free quick oats and a 1-to-1 gluten-free baking flour.
Can I use old-fashioned oats instead of quick oats?
Yes, but the texture will be heartier and chewier. Quick oats create a softer, more even cookie texture.
Do I have to use molasses?
No, but molasses helps improve the texture and gives the cookies a deeper sweetness without making them taste strongly like molasses.
Can I use natural peanut butter?
It is better to use creamy, shelf-stable peanut butter because natural peanut butter can make the dough oily or crumbly.
Why are my cookies spreading too much?
The butter may have been too soft, or the dough may have been overmixed. Make sure the butter is room temperature, not melted.
Can I chill the dough before baking?
Yes. Chilling the dough for 30 minutes can help create thicker cookies.
Can I make smaller cookies?
Yes. Use a smaller scoop and reduce the baking time by a few minutes.
How do I know when the cookies are done?
The edges should look lightly golden, while the centers should still look slightly soft. They will continue to set as they cool.
Can I freeze the cookie dough?
Yes. Scoop the dough into portions, freeze until firm, then store in a freezer-safe bag. Bake from frozen, adding 1 to 2 extra minutes.
Are Monster Cookies good for parties?
Yes. They are colorful, easy to serve, and full of classic cookie flavors, making them great for parties, holidays, and gatherings.
Conclusion
Monster Cookies are big, chewy, colorful cookies filled with peanut butter, oats, M&M’s, and chocolate chips. They’re simple to make, easy to customize, and perfect for sharing while still warm from the oven.
