M&M Cookie Bars – 4 Ingredients Only! [Video]

Catalina Castravet
By Catalina Castravet
5 from 7 reviews

Christmas recipes Cookies

Cook time Cook time: 20 minutes

M&M Cookie Bars are soft and chewy and are easily made with only four ingredients. If you love M&M’s, this is the ultimate treat to make. We guarantee it will satisfy your sweet tooth many times over!

These cookies are festive, delicious and loaded with M&M’s. We love baking them, and especially eating them. They are pure heaven! They are perfect for any occasion and could be a nice project to do with kids. M&M’s lovers can also try our Flourless Peanut Butter Cookies and Easy M&M Twister Cookies.

Homemade M&M Cookie Bars

M&M Cookie Bars could easily be the best-kept secret in the dessert books. Since I love M&M’s and cookies, it was natural to try and mix these two up. Not surprisingly, they are a perfect match. In addition, the cookies are incredibly easy to make, and are soft, buttery, and loaded with M&M’s. Similarly, they require only four ingredients and are ready in about 30 minutes.

These cookies can also be perfect to have with kids. They will love topping and mixing the cookies with M&M’s and arranging them in various orders. The cookies have an amazing texture, with a chewy, dense and buttery flavor. Ready in about 30 minutes from start to finish, they should definitely be on your must-try list!

What are M&M Cookie Bars made of?

They require only four easy ingredients:

  • 1 box vanilla cake mix
  • 2 large eggs
  • 1/2 cup butter
  • 2 cups M&M’s

How to make the perfect M&M Cookie Bars?

  1. In a large bowl, stir the first 3 ingredients together until well combined. Stir in M&M’s.
  2. Preheat the oven to 350 degrees F. Spray a 9×9-inch pan with nonstick spray.
  3. Then, spread and pat the cookie dough in the pan.
  4. Bake for about 20-25 minutes or until golden brown.
  5. Lastly, let them cool before cutting.

Can the dough be made in advance?

Yes, making the dough in advance is definitely an option. Once you made the dough, wrap it up in plastic, and store in the fridge for up to 2-3 days. When the time for cooking comes, let the dough rest at room temperature for a bit to soften.

How long will the M&M Cookie Bars stay fresh?

This delicious homemade dessert can be stored at room temperature for about 4-5 days.

Can you freeze the M&M Cookie Bars?

Yes. First, cool the bars completely and fully wrap it in plastic wrap, tightly. After that, wrap in aluminum foil. Freeze for up to 2-3 months. Defrost before serving.

M&M Cookie Bars Recipe Tips:

  • Let the cookies cool in the baking pan after you remove them from the oven. Because they are very soft, it’s best to let them rest a bit, so they will harden once they cool.
  • You can add chocolate chips to the mix, or Reese’s if you desire.
  • Use a chocolate cake mix for chocolate cookies.
  • You can also use a strawberry cake mix for strawberry cookie bars.

Watch M&M’s Cookie Bars Recipe Video:

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5 from 7 reviews

M&M Cookie Bars

M&M Cookie Bars are soft and chewy, and are easily made with only four ingredients. If you love M&M's, this is the ultimate treat to make. We guarantee it will satisfy your sweet tooth many times over!

Author: Catalina Castravet Serves: 12 cookie bars
Prep time: 10 minutes Cook time: 20 minutes Total time: 30 mins



Nutrition information

Calories: 486 Carbohydrates: 58 Protein: 4 Fat: 26 Saturated Fat: 9 Cholesterol: 32 Sodium: 518 Potassium: 45 Fiber: 1 Sugar: 39 Vitamin A: 820 Vitamin C: 0.2 Calcium: 145 Iron: 1.4


The recipe can be made in a 9x13 inch pan, the baking time will change, the bars will be thinner and will be done in about 20 minutes.

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These are perfect for Christmas! I don't think I could share with Santa... ;)


haha you don't have to share



Such a great idea to use a cake mix to make these easily! Love it!


makes it so much easier



My kids love these! The only hard part is getting them baked before they eat all of the M&Ms!!


lol same here


Chrissie Baker

This recipe is the most amazing I’ve found for M&M cookies! They are so good they’re addictive!!!


Thank you Chrissie!



So perfect for the holidays! Can't wait to try it for our open house! Yummm!


they are very festive :)



I already know my kids will absolutely love this!!


mine loves them a LOT!


Melanie Bauer

Looks heavenly! I'm seriously drooling over this goodness, so excited to make this!


They melt in your mouth!



I love how easy these are! My family will gobble them up!


Yes, just 4 ingredients!



Can you use a 13x9” pan instead?


sure, cook for 15-20 mins.


Sheila Devor

Has anyone tried these with a different flavor cake mix like yellow or chocolate?


You can make them with any cake mix you love!


Susan Kearney

Please forward recipe


Where do you want me to forward it to you?



When doubling the recipe, how long should I cook it if I’m using a 9x13? Thank you 


start checking after 20 minutes, its between 20-30 minutes.



how many gram vanilla cake mix you are using? sometime they have a different box


15.25 oz box


T whiteman

Can you use peanut M&M’s?





Not sure what happened...mine raised up high like a cake!


What cake mix did you use?


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