M&M’S Chocolate Chip Cookie Bars

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Chocolate Chip M&M’s Bars — Soft buttery bars loaded with M&M’s and chocolate chips are a guaranteed hit!! Fast, easy, foolproof, no mixer recipe that’s so much simpler than making cookies!!

Chocolate Chip M&M’s Bars — Soft buttery bars loaded with M&M’s and chocolate chips are a guaranteed hit!! Fast, easy, foolproof, no mixer recipe that's so much simpler than making cookies!!

M&M’s Cookie Bars Recipe

The only thing I may possibly like better than soft and chewy M&M’S cookies are cookie bars. Bars are my favorite kitchen shortcut because they’re so fast and easy to make. No dough to chill or individual cookies to form.

For these very soft, slightly chewy, buttery cookie bars that are loaded with M&M’s and chocolate chips, I called upon my trusty blondie base.

When I want an easy, fuss-free, one-bowl, no-mixer recipe that I know everyone will love, it’s my go-to. With 25+ versions and counting, it never lets me down.

It’s an easy recipe to memorize because everything is ‘one’. In the 1 bowl used, melt 1 stick of butter, stir in 1 egg, 1 cup of brown sugar, 1 tablespoon vanilla, and 1 cup flour.

I stirred in 1 cup of the new Crispy M&M’s, but anything from Dark to Pretzel to Peanut Butter M&M’s would be wonderful. M&M’S has a Pinterest page where you can check out new recipes for baking inspiration.

I loved the texture contrast of the soft bars, with gooey chocolate chips, and the Crispy M&M’s that stay crispy even after being baked. My family’s eyes lit up when they saw these M&M’s bars, and they sure didn’t last long.

stack of three m&m cookie bars on a white plate

What’s in M&M’s Bars? 

To make these easy bar cookies, you’ll need: 

  • Unsalted butter
  • Egg
  • Light brown sugar 
  • Vanilla extract
  • All-purpose flour
  • Salt 
  • Crispy M&M’s 
  • Semi-sweet chocolate chips 

stack of four m&m bars on a white plate. The top bar has a bite missing.

How to Make M&M’s Bars

Melt then butter, then whisk in the egg, brown sugar, and vanilla. Stir in the dry ingredients, then gently fold in the chocolate chips and M&M’s.

Turn the batter into a foil-lined 8×8-inch baking dish and bake until done. 

Allow bars to cool in pan for at least 1 hour before slicing and serving.

How to Store M&M’s Cookie Bars

These M&M’s bar cookies will keep airtight at room temperature for up to 1 week, or in the freezer for up to 6 months.

Can I Double This Recipe? 

You should be able to, yes. However, some readers who have tried doubling this recipe have said their cookie bars have turned out too greasy. If that happens to you, I recommend scaling back the amount of butter to 1 1/2 sticks total and seeing how that works out for you. 

Chocolate Chip M&M’s Bars — Soft buttery bars loaded with M&M’s and chocolate chips are a guaranteed hit!! Fast, easy, foolproof, no mixer recipe that's so much simpler than making cookies!!

Tips for Making M&M’s Bars

I used crispy M&M’s, but you can use any variety you’d like. Likewise, you can add different mix-ins besides chocolate chips, if desired. Chopped nuts and dried fruit would both be good additions! 

Note that I always bake with metal pans and line them with foil for easier cleanup. If baking with a glass pan, your bars may turn out slightly different from mine. 

Lastly, note that these bars firm up as they cool. Be careful not to over bake them, otherwise they’ll be too dry. 

Chocolate Chip M&M’s Bars — Soft buttery bars loaded with M&M’s and chocolate chips are a guaranteed hit!! Fast, easy, foolproof, no mixer recipe that's so much simpler than making cookies!!

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4.72 from 46 votes

M&M’S Chocolate Chip Cookie Bars

By Averie Sunshine
Soft buttery bars loaded with M&M’s and chocolate chips! Fast, easy, foolproof, no mixer recipe that's so much simpler than making cookies!!
Prep Time: 5 minutes
Cook Time: 28 minutes
Additional Time: 57 minutes
Total Time: 1 hour 30 minutes
Servings: 12
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Ingredients  

  • ½ cup unsalted butter, 1 stick, melted
  • 1 large egg
  • 1 cup light brown sugar, packed
  • 1 tablespoon vanilla extract
  • 1 cup all-purpose flour
  • ½ teaspoon salt, or to taste
  • 1 cup Crispy M&M’s, or your favorite M&M’s like Dark, Pretzel, Peanut Butter, plus more for sprinkling
  • ¾ cup semi-sweet chocolate chips, plus more for sprinkling

Instructions 

  • Preheat oven to 350F. Line an 8-by-8-inch baking pan with aluminum foil, spray with cooking spray; set aside.
  • In a large, microwave-safe bowl melt the butter, about 1 minute on high power.
  • Wait momentarily before adding the egg so you don’t scramble it. Add the egg, brown sugar, vanilla, and whisk until smooth.
  • Add the flour, salt, and stir until just combined, don’t overmix.
  • Stir in the M&M’s and chocolate chips.
  • Turn batter out into prepared pan, smoothing the top lightly with a spatula.
  • If desired, evenly sprinkle about 1 tablespoon each of M&M’S and chocolate chips for an extra visual pop, tapping them down lightly with your fingertip.
  • Bake for about 25 to 28 minutes (I baked 26 minutes), or until done. A toothpick inserted in the center should come out clean, or with a few moist crumbs, but no batter. Bars firm up as they cool.
  • Allow bars to cool in pan for at least 1 hour before slicing and serving.

Notes

Bars will keep airtight at room temperature for up to 1 week, or in the freezer for up to 6 months.

Nutrition

Serving: 1, Calories: 310kcal, Carbohydrates: 42g, Protein: 3g, Fat: 15g, Saturated Fat: 9g, Polyunsaturated Fat: 5g, Cholesterol: 38mg, Sodium: 111mg, Fiber: 1g, Sugar: 32g

Nutrition information is automatically calculated, so should only be used as an approximation.

More Easy Bar Cookies: 

ALL OF MY COOKIE BARS! 

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Triple Peanut Butter Monster Cookie Bars - Easy One-Bowl Recipe at averiecooks.com

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Banana Oatmeal Chocolate Chip Cookie Bars — A FAST and EASY dessert that is on the HEALTHIER side with only 1/4 cup butter and no oil!! Bold banana flavor, chewiness from the oats, and plenty of chocolate in every bite!!

Tagalong Cookie Bars — Say hello to year-round Girl Scout cookie season with these delish bars! All the flavors of the classic cookies in easy bar form!!

Peanut Butter Brookies— These brookies are soft and chewy, with peanut butter and chocolate married together in every bite. All you need is two bowls, and no mixer is required!

 Post is brought to you by M&M’S. The recipe, images, text, and opinions expressed are my own.

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Please note: I have only made the recipe as written, and cannot give advice or predict what will happen if you change something. If you have a question regarding changing, altering, or making substitutions to the recipe, please check out the FAQ page for more info.

Recipe Rating




Comments

  1. Double the recipe for a 9×12 pan and only had dark brown sugar. I used red white and blue M&Ms for the Fourth of July. Forgot to double them and the chocolate chips until after they were already in the pan so I just stirred in some more. I’ll let you know how they came out 😊

    1. Came out great, I probably did not need to totally double the M&Ms or chocolate chips. Dark brown sugar worked fine.

  2. 5 stars
    Delicous! They do not need nearly as many chocolate chips as the recipe calls for in my opinion though. I made these once for my class, and ever since I have been known as the class baker! I am now expected to bring them to every class party. These bars are worth your time!

  3. 5 stars
    I found this the morning of a baby shower I hosted this weekend! I just needed one more baked item on my trays and this square didn’t disappoint!! I followed the recipe exactly, no substitutions, and it turned out great!! I did leave it in the pan until cool before slicing it. It’s a keeper!!

  4. 5 stars
    I found this the morning of a baby shower I hosted this weekend! I just needed one more baked item on my trays and this square didn’t disappoint!! I followed the recipe exactly, no substitutions, and it turned out great!! I did leave it in the pan until cool before slicing it. It’s a keeper!!

  5. I love making these bars. I wanted to make some tonight but just realized I’m out of light brown sugar! Can they be made with dark brown sugar instead?

  6. 5 stars
    I just made these using pumpkin spice M&Ms and mini chocolate chips with some fall colored sprinkles on top. So good! They were a huge hit and so easy. I prefer bars over cookies because they are so much easier. This base will be my new go-to!

    1. Thanks for the 5 star review and I’m sure the pumpkin spiced M&Ms were so good this time of year! Glad this will be your new go-to base!

  7. 5 stars
    I just made these using pumpkin spice M&Ms and mini chocolate chips with some fall colored sprinkles on top. So good! They were a huge hit and so easy. I prefer bars over cookies because they are so much easier. This base will be my new go-to!

  8. 5 stars
    These were delicious! Made them this afternoon and they were gone within the hour! I didn’t have any m&m’s so just used a mixture of white and milk chocolate chips and holy they’re good

  9. 5 stars
    These were delicious! Made them this afternoon and they were gone within the hour! I didn’t have any m&m’s so just used a mixture of white and milk chocolate chips and holy they’re good

  10. M & M just came out with a caramel version! Yummy & they would be great I’m these bars. Thanks for the recipe!

  11. Can’t wait to try this recipe! Have a church bake sale coming up and my son has a work picnic. I see that someone else successfully doubled the recipe in a 9×13 pan and baked for a little longer. Does it matter if it’s glass or metal? Also, if you bake two pans in the oven at the same time, do you need to increase baking time? Thank you so much!

    1. Does it matter if it’s glass or metal? = yes, I bake in metal and recipe is written based on that with regard to baking time.

      if you bake two pans in the oven at the same time, do you need to increase baking time? = possibly slightly but I’m not sure because I haven’t tried it that way.

  12. I made these for the 4th of July with red, white and blue M & M’s and they were great. The recipe was exactly what I was looking for ! Thank you.

    1. Thanks for trying the recipe and I’m glad it came out great for you! Sounds like a great 4th of July recipe with the R/W/B M&Ms!

    1. I have many recipes for M&M cookies. Google ‘averie cooks M&M cookies’ and about 6 different versions will pop up. Enjoy!

      This recipe is not intended to be made as cookies.

    1. Thanks for trying the recipe and I’m glad it came out great for you! And I agree…best blondie base of all time :)

  13. I would like to make these bars for Christmas but due to a nut allergy do you think Christmas coloured smarties would work?  I’ve never baked with smarties before and I’m not sure if they melt or not.

    1. I haven’t ever baked with Smarties so not sure how they change when heated. If you use M&M’s that aren’t the peanut, almond, etc versions and just stick to the plain ones…if that works for your allergy then I’d do that.