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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 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. 5 stars
    This recipe is OMG delicious! Definitely on my Christmas cookie list!

    Thank you for sharing!

  2. 5 stars
    This recipe is OMG delicious! Definitely on my Christmas cookie list!

    Thank you for sharing!

    1. Thanks for the 5 star review and I am glad these were delicious and are making their way to your Christmas cookie list!

  3. 5 stars
    Thank you for sharing this easy and delicious recipe.

     I had some M&M’s leftover from Christmas that I needed to use up. A search for a recipe led me to yours.  I love everything about it; the amount it makes,  the simple ingredients and it can be whipped up quickly with minimal dirty dishes.

    I will be making more of the recipes you have shared.

    Have a blessed day and be safe. 

  4. 5 stars
    Thank you for sharing this easy and delicious recipe.

     I had some M&M’s leftover from Christmas that I needed to use up. A search for a recipe led me to yours.  I love everything about it; the amount it makes,  the simple ingredients and it can be whipped up quickly with minimal dirty dishes.

    I will be making more of the recipes you have shared.

    Have a blessed day and be safe. 

    1. Thanks for the 5 star review and glad these were easy, delish, and you could use up those Christmas M&Ms! Hope you enjoy the future recipes of mine that you try!

  5. Hi. I really love the recipe for your M&M’s choc chip cookie bars and would love to give them a go. My problem is that I live in the UK and I have no clue about the measures for the ingredients as I only have metric measures. I’ve tried to find a conversion chart but every one I’ve found has given different answers! Please could you help as my grandchildren are standing by desperate to be taste testers!

  6. 5 stars
    Yet another knockout recipe! I love that the cookie dough itself is super flavorful (I hate when the only thing you taste in cookies / cookie bars are the mix-ins. Like, what’s the point of that??). The bars were incredibly easy to make … so easy in fact that I convinced myself I’d forgotten an ingredient! But I hadn’t, so these came out perfectly! I underbaked mine a tad because I wanted them a bit gooey, I’m thinking the leftovers deserve to be served a la mode :) 

  7. 5 stars
    Yet another knockout recipe! I love that the cookie dough itself is super flavorful (I hate when the only thing you taste in cookies / cookie bars are the mix-ins. Like, what’s the point of that??). The bars were incredibly easy to make … so easy in fact that I convinced myself I’d forgotten an ingredient! But I hadn’t, so these came out perfectly! I underbaked mine a tad because I wanted them a bit gooey, I’m thinking the leftovers deserve to be served a la mode :) 

    1. Thanks for the 5 star review, Claire, and glad these turned out great for you! And yes, so super easy without many ingredients! Gooey is the best way for me!

  8. 5 stars
    This is truly the best recipe ever! I have even made it with frozen blueberries. Thank you so much for the recipe!

  9. 5 stars
    This is truly the best recipe ever! I have even made it with frozen blueberries. Thank you so much for the recipe!

    1. Thanks for the 5 star review and glad it’s the best for you and have even made the bars with frozen blueberries!

  10. Great site!!! Just a quick question please!!! How come you don’t add in either baking powder and/or baking soda?
    Thanks so much!!!

    1. It’s not necessary, for me, in this recipe. You can experiment with either if you’d like.

  11. Hi! I recently discovered these and first want to thank you for sharing the recipe! Secondly, I’ve made them twice and unfortunately both times they’ve come out very greasy on the bottom, almost to the point where they feel very undercooked. I’m generally a good baker, so I’m puzzled about what I’m doing wrong. I’ve tried both a glass dish and a metal pan (no foil either time) and have baked about 10 minutes longer than called for. Other recipes come out fine, so I don’t think it’s an issue with my oven. I did double the recipe each time – maybe it’s too much butter when doubled? Any ideas you may have would be appreciated, I’m determined to get this right! Thanks so much! :)

    1. This is odd…hmmm. You could scale back by 2 tbsp on the butter. You could add an extra 1/4 or so cup of flour, that would dry them out, either method.

      Normally I would say bake longer but you already did that.

      And WAIT I just read down to the part that you doubled the recipe. That is probably the culprit. For whatever reason when doubled, the butter is just too much as written with 2 sticks. I would do 1 1/2 sticks and see how that works next time.

      1. Thank you so much for the quick response! I’ll give that a try next time and I bet that will solve it. Have a blessed day!

  12. 5 stars
    These are now my family’s favorite!!! I did not put as much chocolate in them – only a cup of M&Ms or a cup of semi sweet chocolate chips because my son is not a huge chocolate fan but the result was the same – AMAZING!!!. I love that it only makes a small batch and cooks evenly. Thank you!!!

  13. 5 stars
    These are now my family’s favorite!!! I did not put as much chocolate in them – only a cup of M&Ms or a cup of semi sweet chocolate chips because my son is not a huge chocolate fan but the result was the same – AMAZING!!!. I love that it only makes a small batch and cooks evenly. Thank you!!!

  14. 5 stars
    I just made these with Red, White and Blue Carmel M&Ms. My children gave them 10 thumbs up! I doubled the recipe and followed the instructions exactly except I only used 1 cup of chocolate chips. Doubling would have required 1 1/2 cups. I also pressed additional M&Ms in the batter once the batter was in the pan. The recipe base is definitely a keeper and I love that I don’t have to wait for butter to soften! Also, I baked the bars 28 minutes. Love!!!

  15. 5 stars
    I just made these with Red, White and Blue Carmel M&Ms. My children gave them 10 thumbs up! I doubled the recipe and followed the instructions exactly except I only used 1 cup of chocolate chips. Doubling would have required 1 1/2 cups. I also pressed additional M&Ms in the batter once the batter was in the pan. The recipe base is definitely a keeper and I love that I don’t have to wait for butter to soften! Also, I baked the bars 28 minutes. Love!!!

  16. 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!

    1. Thanks for the 5 star review and glad these are always requested!

      And yes feel free to cut back on the choc chips quantity if you prefer a bit less.