These thick and chewy M&M Cookie Bars are made with basic pantry staples and capture all the chewy deliciousness of regular M&M cookies without needing to scoop or roll the dough! 

Oh how I love a delicious cookie bar!  If you like these, don’t miss my Oatmeal Chocolate Chip Cookie Bars, Sugar Cookie Bars, and Magic Bars.

M&M Cookie Bars cut into squares on a board with parchment paper.

There’s nothing you wont LOVE about these M&M Cookie Bars but you’ll especially love how easy they are to make! No rolling or chilling the dough or baking several batches–just press everything into a 9×13 pan and bake! They feed a crowd and everyone always raves about them! What’s not to love about super soft, chewy, cookie bars loaded with M&M candies?

How to Make M&M Cookie Bars:

1. Combine dry ingredients: flour, baking powder, baking soda and salt in a medium bowl; set aside.

2. Combine wet ingredients: Add butter, sugar and brown sugar to a large mixing bowl or stand mixer and beat well until creamed together. Add egg and vanilla and mix until combined. Gradually mix in the dry ingredients and mix until combined.

Two process photos for making M&M cookie dough in a mixing bowl.

3. Add chocolate: Stir in chocolate chips and m&m’s.

4. Bake:  Press dough into a greased 9×13” pan and bake at 350 degrees F. for 22-35 minutes. Remove from pan and let cool completely. Pull up on the sides of parchment paper to remove bars from the pan and cut into squares.

A pan with M&M Cookie Bars dough, then a photo of the baked bars, cut into squares.

Make Ahead And Freezing Instructions:

To make ahead: The cookie dough can be made 2-3 days ahead of time, stored in the refrigerator.

To freeze: allow baked bars to cool completely after cooking and cut them into squares.  Place squares into a freezer safe bag or container and freeze for up to 3 months. Cookie dough can also be frozen for up to 3 months.

Recipes Variations:

  • Add nuts: chopped walnuts or pecans
  • Substitute the chips: feel free to add or substitute your favorite “chips”, like peanut butter or white chocolate chips.

Looking for more Cookie and Bar recipes? Try these:

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Recipe

M&M Cookie Bars cut into squares on a board with parchment paper.
Prep 10 mins
Cook 25 mins
Total 35 mins
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Ingredients
  

Instructions
 

  • Preheat oven to 350 degrees F.
  • Line a 9 x13 baking pan with parchment paper. Set aside.
  • Combine flour, baking powder, baking soda and salt in a medium bowl; set aside.
  • Add butter, sugar and brown sugar to a large mixing bowl or stand mixer and beat well until creamed together. Add egg and vanilla and mix until combined.
  • Gradually mix in the flour and mix until combined. Stir in chocolate chips and m&m’s. Press dough into an even layer in prepared pan.
  • Bake for 22-35 minutes or until a toothpick inserted in the center comes out clean.
  • Remove from pan and let cool completely. Pull on side of parchment paper to remove bars from the pan and cut into squares.

Notes

Make ahead Instructions: The cookie dough can be made 2-3 days ahead of time, stored in the refrigerator.
Freezing Instructions: allow baked bars to cool completely after cooking and cut them into squares.  Place squares into a freezer safe bag or container and freeze for up to 3 months. Cookie dough can also be frozen for up to 3 months.
Recipes Variations:
  • Add nuts: chopped walnuts or pecans
  • Substitute the chips: feel free to add or substitute your favorite "chips", like peanut butter or white chocolate chips.

Nutrition

Calories: 251kcalCarbohydrates: 36gProtein: 3gFat: 11gSaturated Fat: 7gCholesterol: 41mgSodium: 222mgPotassium: 59mgFiber: 1gSugar: 21gVitamin A: 317IUCalcium: 29mgIron: 1mg

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I originally shared this recipe June 2017. Updated October 2020.

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About The Author

Lauren Allen

Welcome! I’m Lauren, a mom of four and lover of good food. Here you’ll find easy recipes and weeknight meal ideas made with real ingredients, with step-by-step photos and videos.

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Comments

  1. 2 stars
    These were awful!! I put them in for 15 minutes to ensure I didn’t over cook them, but then kept watching them…. An ADDITIONAL 30 minutes later, the top is DARK brown and the bottom is complete mush. We promised our little ones a bite before bed, so they were up half hour past bed time. I ate some of the mush after they went to bed and it tastes like salt. This was a true bust!! 🙁

  2. 5 stars
    These were perfect! No issues with under cooked dough. Followed recipe exactly and used an aluminum pan. Delicious!!

  3. 2 stars
    I was so excited to make these, even though some people said it took longer than the recipe called for. After 45 mins they were still undercooked :/ I’m wondering if it was my ceramic dish vs. metal dish. The outside part that cooked is delicious, I wish they had all turned out!

  4. 1 star
    Followed all instructions. Raw on inside after baking a total of 30 minutes (at 350). Just put back in to see if I can still salvage all these ingredients.

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