Christmas M&M Cookie Bars – with a TWIST!

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Not quite a cookie and not quite a brownie, these M&M Cookie Bars are sure to please everyone this Holiday Season! They are loaded with crunchy cookie pieces and white chocolate chips, and of course full of red and green M&M’s to give them a festive spin (though any regular M&M can be used for other occasions too). They are so easy to make and each cookie bar has a crunchy outside with a soft and sweet middle…what’s not to love? 

Cookie Bars with M&Ms on Christmas Plate

our christmas cookie bars

My husband came home with this new package of chocolate chips the other week with cookie pieces in it and as soon as I saw them I knew I was going to make something special for my nephews birthday celebration on the weekend. His birthday is so close to Christmas but I always want to make something special (rather than plain cupcakes or cookies) to share that I know he will enjoy, even if it has a Christmas spin on it!

Now I knew I didn’t want to do just a regular cookie, and I didn’t want a brownie either (while I love them -see our Nutella Brownies) I really wanted to make something that would showcase the crunchy cookie pieces of the chipits he brought home. That is how we came up with these tasty Christmas Cookie Bars that we are now calling a “Brookie” (brownie/cookie)! Just think about how cute these would be on a plate for Santa!

M&M Cookie Bars - Dough in 8x8 Baking Pan


Tips for the perfect cookie bars

  • Take your margarine and egg out of the fridge ahead of time – try for at least 30 minutes but longer is better.
  • Add your chipits and M&M’s last and only mix until combined – this prevents them from breaking apart and keeps whole chunks in your bars.
  • Keep a eye on the timer, set it for 25 minutes and check them – they should be lightly golden on top but not dark as they will continue to cook once they are pulled and you want to make sure you have the soft center.
  • Allow them to cool completely before cutting them! As tempting as it is to eat one fresh from the oven if you don’t let them cool then you will end up with squished candies on top and throughout.

how do you turn a cookie recipe into a cookie bar

It really comes down to the amount of time in the oven and the method of baking. Rather than dropping your cookie dough by teaspoon full onto a baking sheet you will want to use an 8″x 8″ greased baking pan, this will get the needed depth for you to cut into squares. As for the time in the oven, you will need to increase this from a normal 10-12 minute bake time for a traditional cookie recipe. For a typical 8″ baking pan I suggest starting with a timer for 25 minutes and to pull them once they are lightly golden on top.

Now you also want to keep in mind that many cookie recipes make 24-36 individual cookies and this would be too much for your bars. You should have about 1.5″ of batter in your pan for best results, and if you have left over batter you can always freeze it and use it for cookies later on!

Christmas M&M Cookie Bars

Loaded with chocolate cookie pieces, white chocolate chips, and M&M's these Cookie Bars are so easy to make with a crunchy outside with a soft and sweet middle...what's not to love? 
Course Dessert, Holiday Treats, Snack
Cuisine American
Keyword Cookie Bars, Cookie Recipes, M&Ms
Prep Time 5 minutes
Cook Time 25 minutes
Total Time 30 minutes
Servings 16 bars


  • 6 tbsp Margarine can use butter as well
  • 1/2 cup Granulated Sugar
  • 1/4 cup Brown Sugar lightly packed
  • 1 Egg
  • 1 tsp Vanilla
  • 1 cup Flour All purpose
  • 1/2 tsp Baking Soda
  • pinch Salt
  • 1 cup M&M's Candy
  • 1 package Cookies n Cream Chipits (white chocolate chips with cookie pieces)


  • Grease an 8 x 8 baking pan and set aside. Preheat oven to 350 F. 
  • Beat margarine with sugars until light and fluffy. Add in egg and vanilla and beat on medium speed until fully combined. 
  • In a small bowl whisk together your dry ingredients (flour, salt, baking soda). Add to wet ingredients and mix to combine.
  • Stir in both chocolates only until mixed through (do not beat as you will break the pieces). 
  • Bake 22-27 minutes, until they are lightly golden. Allow to cool completely before cutting into bars. 

you may need…

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Every baker needs to have a set of glass bake ware and we personally love the Anchor Glass Baking Set. Add some to your Christmas list today!


The best thing about these M&M Cookie Bars, besides their deliciousness, was hearing how much everyone else enjoyed them! My nephews searched me out at the party just to tell me how yummy they were, now if that doesn’t make your heart expand I don’t know what will. The only issue? I ALWAYS like to leave a couple of whatever I have made (cookies, bars, brownies etc) on a plate at home so me and my hubby can have one the following day since we hardly ever eat our own stuff at a party…but since he packed our tray this time there were none left for us to enjoy so all we got were our “tester” cookie bars! That’s okay though, just means I get to make them again!

you may also like

Elf Poop – White Chocolate Haystack Cookies

Grinch Inspired Rice Krispie Treats 

50 Bar Cookies – The Food Network

Best Ever Double Chocolate Chunk Cookies 

Christmas M&M Cookie Bars

Loaded with chocolate cookie pieces, white chocolate chips, and M&M’s these Cookie Bars have a crunchy outside with a soft and sweet middle made for eating! #CookieBars #M&MCookieBars #CookieRecipes #ChristmasBaking

16 thoughts on “Christmas M&M Cookie Bars – with a TWIST!

  1. Marisa Franca says:

    I’ve always loved the idea of using M&M’s in cookies especially since you can gear them towards the specific holiday. The red and green screams Christmas. They certainly will be a hit on the dessert tray.

  2. April says:

    Everything that has M&Ms in it is a must for me. I just love them. And if you say these cookie bars will please everyone, I can’t go past. Thank you!

    • oliveblogger says:

      Thanks April!! These Cookie bars are loaded with chocolate and cookie pieces that I know everyone will love, let us know if you make them!

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