Posted by & filed under Christmas, Desserts, Recipes.

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I’m excited to share these delicious M&M cookie bars with you today! They are perfect for a cookie exchange or holiday party. Cookie bars have to be one of my favorites. I’ve made so many different versions and this one is delicious! I think I finally have perfected it… just in time for the holidays. ;)  Enjoy!

Christmas M&M cookie bars


  • 2 cups all-purpose flour
  • 1/2 tsp baking soda
  • 1/2 tsp baking powder
  • 1 1/2 cubes of butter (12 TB) softened
  • 1 cup sugar
  • 1/2 cup brown sugar (packed)
  • 2 eggs
  • 1 tsp vanilla
  • 11 oz bag mini baking M&M’s (save a few to go on top)


  1. 1. Combine flour, baking soda and baking powder in a medium sized bowl and set aside.
  2. 2. Mix together in a large bowl: sugar, brown sugar, butter, eggs and vanilla. Mix for about 1 minute, or until fluffy. Then slowly add the flour mixture to the wet ingredients.
  3. 3. Fold in m&m's and then place dough in a 13x9 baking sheet lined with foil. Then place a few M&M's on top.
  4. 4. Bake at 325 for 20-35 minutes (depending on oven), or until a toothpick comes clean.
  5. (Optional) For glaze: Combine 1 cup powdered sugar + 1 TB milk and drizzle over cookies once cooled.



For more Christmas ideas make sure to check  out this post HERE. I hope you all have a Happy Holidays!

Also don’t miss:

20 best Christmas cookies

Homeade chocolate peppermint oreos

Chocolate candy cane kiss cookies


Jamielyn Nye is the owner and managing editor of I Heart Nap Time. She aspires to reach women, get their creative juices flowing, and to genuinely inspire. Her unique projects have been featured on many popular websites, including: BHG, Martha Stewart, Fox, ABC, People, Parents and more. When she’s not creating . . . Jamielyn loves to chase her two little monkeys and snuggle up on the couch with her man.

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43 Responses to “Christmas M&M cookie bars”

  1. Jane

    The only problem with these is that if I bake them while my boyfriend is there, he will eat them all and not give me a chance to try them haha. These look sooo yummy!

  2. noire

    This looks so yummy! Thanks for sharing the recipe. I like how you decorated them as well, very ‘Christmasy’ LOL xx

  3. Shelly B

    I just wanted to leave a little note letting you know that I made these last weekend and they were wonderful! I used a smaller baking dish so my bars turned out about 3 times as thick as the ones in your picture (also lead to a cook time of nearly 40 minutes.) SO SO YUMMY! Thank you.

  4. Mitch

    tried these today but it had a very bad aftertaste… unfortunate since they looked so good! Not sure if i did something wrong because I thought I followed the instructions perfectly… I used yellow sugar instead of brown. Could that have been it?

  5. Marcie

    I normally love your recipes – your green chile enchiladas are a family favorite, and your orange dream cupcakes are delicious! But I had problems with this recipe, even though I followed the instructions exactly. At 20 minutes of baking time, the inside of the pan was still soupy. I had to bake them another 15 minutes before the toothpick came out clean, and at that point they had browned so much that they weren’t as pretty as yours. They still taste good, but I was disappointed in the appearance since I made them for a bake sale. Normally my oven bakes okay, so I don’t know what the problem was. Just wanted to give others a heads up that they may need to plan for a little extra baking time!

    • Jamielyn

      Oh no! Did you line your pan with foil? That seems to really help evenly cook them. Also make sure your oven is all the way heated before sticking them in. Merry Christmas!

  6. Summer

    I just made these about an hour ago. I too had to leave them in the oven for an additional 10 minutes. Overall they were delicious!

  7. Natalie C

    Hi! I made these…but, mine were THICK. I used a 9×13 baking pan. Yours look thin. Which is one of the reasons, I tried this recipe. But, maybe next time I’ll use a bigger dish…b/c I would like them thin like your picture!

    • Natalie C

      Also, my baking time ended up being about 15 minutes longer b/c they were so thick! I’ll try a larger pan next time and see! :)

  8. Kelsey

    Can you freeze these like you would cookies? Would they still be the same after defrosting?

  9. Lisa K

    YUM! I made these last night for a cookie exchange and I think they’re delicious! They’re sure to be a crowd pleaser!

  10. Amy

    Cooking time way longer than 20 minutes. I used same size pan, and cookies were thicker…still yummy

      • Eileen

        I’m confused about the amount of butter to use. You listed it as 1 and 1/2 cups butter but you also said 12 TB which is only 3/4 cup butter. If you are suggesting 1 and 1/2 cups of butter, then you mean 24 TB. Please advise. Thanks!

        • Lindsay

          Now I’m confused about the butter. How much? 1.5 cups? 0.5? Something else? Also, about how many bars does this make? I need about 4 dozen so I want to know how much to increase the recipe. Thanks!

          • Jamielyn

            It is 1.5 cubes of butter or 12 TB of butter! Sorry for the confusion! :) They are made in a 13×9 baking sheet, so it depends how big you cut them! I usually get about 20 from this sheet!

  11. Samantha

    Would these freeze well? I am looking for a cookie recipe for a cookie exchange for work but they need to be freezable as we are exchanging a lot and a few weeks before christmas.

  12. Emalee

    How many bars will this recipe make? I need 84 cookies for a cookie exchange. I’m trying to figure out how much of each ingredient i will need. Thanks!