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Christmas Monster Cookies for your December weekend baking…festive, easy, and sweet. Homemade chocolate chip cookies, made with oats, pretzels pieces, plenty of chocolate chunks, white chocolate, and plenty of holiday M&M’s. There’s nothing not to love about these sweet chocolate (crunch) cookies. Each bite is slightly crisp on the edges but soft and gooey in the center…with just a little salty pretzel crunch and milk chocolate throughout.

Christmas Monster Cookies |

Fridays in December are just better! There are holiday parties, searching for the perfect gift for someone you love, and baking the nights away with family and friends. Well, at least that’s the “Hallmark” version I have in my head.

The reality is a little less picture-perfect for sure, but I’m definitely doing the baking! It’s one of the reasons we love this season the most. I mean there are so many cookies! As I said on Tuesday, this year I’m really focusing on all of the holiday cookies I haven’t made before.

My list of cookies is a mile long, but I only have a handful of days to share them. So, I’m trying to pick the very best on my list. It’s tricky, but I always knew these cookies needed to be shared. The combination of ingredients is just too good.

Christmas Monster Cookies |

The steps are easy

One: gather your ingredients. You’ll need the basics…butter, sugar, flour, etc. Simple, simple, nothing fancy, but all good.

Two: the stir-ins, they’re are the most important part. You’ll need old fashioned oats, salted pretzel twists, semi-sweet or dark chocolate chunks, and white chocolate chips. And then plenty of red and green holiday M&M’s, which really make these cookies.

Three: beat, mix, stir, bake.

Four: eat these cookies warm, just out of the oven, because these are those kind of gooey delicious cookies.

Christmas Monster Cookies |

A couple notes

It’s important to note that these cookies do spread. They’re meant to have slightly crisp edges and perfectly soft gooey centers, just like in the photos. My favorite type of cookie…totally delicious.

If you want a bit of a thicker cookie, simply omit the additional egg yolk and use only two eggs. This will give you a thicker cookie without as much spreading.

To get the M&M’s to really pop, I like to add in a few just before the cookies finish baking completely. This way each cookie has a bit of the festive M&M’s right on top.

Christmas Monster Cookies |

What I love about these cookies is that they’re so easy to make. They require no chilling and they really are completely no fuss. Especially when it comes to Christmas cookies.

These cookies have perfectly crisp edges, yet soft and gooey centers. They’ve got a nice crunch plus a little saltiness from the pretzels – the best kind of cookie.

I’m excited to include these in the year’s Christmas cookie box. They’re perfect for packing up and gifting to friends for the holidays!

Christmas Monster Cookies |

Looking for other Christmas cookies? Here are my favorites: 

2020 Holiday Cookie Box

Holly Jolly Santa Cookies

Easy Vanilla Bean Christmas Lights Cookies

Easy Hot Chocolate Lace Cookies

Lastly, if you make these Christmas Monster Cookies, be sure to leave a comment and/or give this recipe a rating! Above all, I love to hear from you guys and always do my best to respond to each and every comment. And of course, if you do make this recipe, don’t forget to tag me on Instagram! Looking through the photos of recipes you all have made is my favorite!

Christmas Monster Cookies

Prep Time 20 minutes
Cook Time 15 minutes
Total Time 35 minutes
Servings: 20 cookies
Calories Per Serving: 364 kcal

Nutritional information is only an estimate. The accuracy of the nutritional information for any recipe on this site is not guaranteed.

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  • 1. Preheat the oven to 350° F. Line a baking sheet with parchment paper.
    2. In a large mixing bowl, beat together the butter, brown sugar, granulated sugar, and vanilla until combined. Beat in the eggs and 1 egg yolk, 1 at a time, until combined. Add the flour, baking soda, baking powder, and salt. Beat in the oats.
    3. Fold in 1 cup of the M&M's, the pretzels, chocolate chips, and white chocolate.
    4. Roll the dough into 1/4 cup size balls. Place 3 inches apart on the prepared baking sheet.
    5. Transfer to the oven and bake for 8 minutes, then rotate the pan and bake another 2 minutes. Pull the pan out and push the remaining M&M's into the cookies. Bake 2-3 minutes. Remove from the oven and let the cookies cool on the baking sheet. They will continue to cook slightly as they sit on the baking sheet.
    6. Eat warm (highly recommended) or let cool and store in an airtight container for up to 4 days. 
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Christmas Monster Cookies |

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    1. Hey Angela,
      Happy Sunday!! Thanks so much for giving this recipe a try and your comment, so glad to hear it was enjoyed! xT

  1. 5 stars
    I love this recipe! I’ve made it several times now. Since it makes a lot of dough and there are only two people in my house, I like to shape some of it into balls and freeze them so I can easily bake up some fresh cookies without mixing a whole batch. These bake great from frozen with just a minute or two of extra baking time.

    1. Hey Erica,
      Happy Friday!!⛄️❄️ I appreciate you making this recipe and sharing your review, so glad to hear it turned out well for you! xT

  2. Hello Tieghan, first i would like to let you know how much i love your recipes. I love them altough i have to translate everything into german. I tried this recipe and i Was really ecxited. But my cookies came out really big, flat and thin. They were also kind of moist and chewy. I know in the States they have soft and chewy cookies. So i dont know if they are supposed to be like that or if i did something wrong. Maybe i should have only used the two eggs, without the egg yolk? Thanks for your great recipes and best wishes from Germany.

    1. Hey Lisa,
      Thanks so much for making so many recipes and your kind feedback! Next time, I would try chilling your dough, that will make for a puffier cookie! I hope this helps! xT

  3. 5 stars
    Made these tonight with my 5 year old. Sooooo yummy! He’s already asked when we can make them again. Question: mine were more puffy than yours. What can I do to flatten them a bit next time?

    1. Hey Jen,
      Happy Friday!! I appreciate you trying this recipe and sharing your review, so glad to hear it was a hit! Did you tap your baking sheet on the counter? That will help to flatten them!⛄️ xT

  4. 5 stars
    So.Good❤️ Just made these for my family and we loved them. A nice cookie to make when you want something a little extra!
    PS I used flax eggs for anyone wondering the same.

    1. Hey Leslie,
      Happy Wednesday!!❄️ Thanks so much for giving this recipe a try and sharing your feedback, I am so glad it was a hit! xx