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Christmas Monster Cookies

Christmas Monster Cookies will be the last cookies we bake this year! 

Christmas Monster Cookies on a green tree platter

Monster Cookies are made up of all kinds of delicious things including M&M’S and chocolate chips. These festive-looking cookies are great for the holidays, and they happen to be delicious too!

ingredient in a bowl for Christmas Monster Cookies

How to make Christmas Monster Cookies:

Peanut butter, sugars and butter are combined with a mixer. And then the eggs and vanilla extract are mixed in.  You can start mixing in the oats and the baking soda. If your mixer is working too hard to get the oats mixed in, you might want to take over with stirring them in instead. It takes some real muscle to stir this heavy mixture of ingredients! Chocolate chips and holiday M&M’s are stirred in last.

cookie dough on baking sheet ready for oven

In order to make your Monster Cookies uniform in size, use a cookie scoop! Or you can use a tablespoon and then clean hands to urge the dough onto the baking sheet. Sometimes it’s just good to do it the old-fashioned way. If you would like more “Monster” sized cookies, you can use an ice cream scoop instead. 

christmas monster cookies on cooling rack

You’ll get 36 smaller cookies, or 22 larger cookies out of the recipe. Leave them on a cooling rack to cool completely before you try to move them around. The chocolate needs a chance to go from hot and melted to cool and set.

christmas monster cookies on cooling rack

These Monster Cookies taste great. We give them to our friends and neighbors, who enjoy them a lot. Kids love these sweet cookies for snacks. We love these holiday cookies and hope that they will be on your list to make too. Enjoy!

Note: Brooks (RecipeBoy) first made these Christmas Monster Cookies for the RecipeBoy blog in 2012- when he was just 11 years old. Check out the photos underneath the recipe below of Brooks making the cookies back then. The recipe has been updated to include new photos in 202o.

christmas monster cookies in a stack

Here are a few more Christmas cookie recipes you might like to try:

Christmas Monster Cookies on a green tree platter

Christmas Monster Cookies
You can make these any time of year, but I used the Christmas M&M's to make them a Christmas cookie!
Prep Time 15 minutes
Cook Time 10 minutes
Total Time 25 minutes
Course Dessert
Cuisine American
Servings 36 cookies (1 cup per serving)
Calories 232 kcal



  • Preheat the oven to 350℉. Line baking sheets with parchment paper or silpat mats.
  • In a large bowl, combine the peanut butter with the sugars and butter. Use an electric mixer to mix until well combined. Mix in the eggs and vanilla. Mix in the oats and baking soda. Then stir in the chips and M&M's.
  • Drop the cookies by heaping spoonfuls onto the prepared cookie sheets. If you'd like your cookies to look pretty (like the photos), dot a few extra M&M's on each mound of dough before baking.
  • Bake 10 to 12 minutes. Do not over-bake. Cool for 5 minutes on cookie sheets until cookies are set. Transfer to wire racks; cool completely before storing in an airtight container.


  • *If you are preparing this cookie as gluten-free, just be sure to make sure you are using brands of the following items that are known to be GF: peanut butter, vanilla, oats, chocolate chips and M&M's.
  • *If you'd prefer to make giant cookies, use an ice cream scoop instead to scoop the dough onto the cookie sheet. They'll need to bake for 18 to 20 minutes, and you'll end up with about 22 cookies.


Serving: 1cookieCalories: 232kcalCarbohydrates: 28gProtein: 5gFat: 12gSaturated Fat: 5gPolyunsaturated Fat: 2gMonounsaturated Fat: 4gTrans Fat: 0.1gCholesterol: 23mgSodium: 140mgPotassium: 127mgFiber: 2gSugar: 19gVitamin A: 118IUVitamin C: 0.03mgCalcium: 29mgIron: 1mg
Keyword christmas, cookies, monster
Tried this recipe?Let us know how it was!

RecipeBoy baking cookies


Recipe Rating


Thursday 21st of December 2017

can you freeze these after baking them?


Sunday 7th of January 2018



Thursday 2nd of November 2017

It was really really yummy! Two thumbs up !!!!


Thursday 3rd of April 2014

I have been making these cookies since my girls were little (at least 25 years) and my grandson got to try them this past Christmas for the first time and loved them too. The only thing different I do is add sunflower seeds to the batter which wasn't in the original recipe. The cookbook I found this recipe in was Carpenter High School Cookbook, Meadow Lake, Saskatchewan, Canada which was published in 1982. They are a "must make" every year and have even been shipped out to the West Coast for my daughter a couple of years when she didn't make it home for Christmas. Your blog is great.....keep up the good work.

Mr. Crew

Friday 11th of October 2013

made these with regular M&M's and they were fab, I am now going to try with the pumpkin spice M&M's and add a bit of pumpkin spice to it for Canadian Thanksgiving this weekend.

Mrs. Crouch

Sunday 14th of April 2013


My husband and I are major cookie lovers and bakers—and thus far we like your recipe the best! We like the balance between the oats and peanut butter and the loaded chocolate! haha

Great job, keep it up!