Loaded M&M Oreo Cookie Bars

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Loaded M&M’s Oreo Bars — Stuffed to the max with M&M’s and Oreos! These Oreo cookie bars are an easy, no-mixer recipe that’s ready in 30 minutes. Always a hit at parties!

Loaded M&M's Oreo Bars — Stuffed to the max with M&Ms and Oreos! Easy, no-mixer recipe that's ready in 30 minutes. Always a hit at parties!

If you like Oreos and M&M’s, these are the bars for you. Is there anyone who doesn’t like Oreos and M&M’s? I hope not. Or you may be reading the wrong blog.

These bars came to be because I was preparing to move and in an effort to clean out my pantry, I started grabbing things that looked like they’d work together.

Half-eaten package of Oreos. Check. A small bag of M&M’s that appear to have most of the reds and browns picked out. Check. A stick of butter, 1 egg, 1 cup of brown sugar, and 1 cup flour. Check. I always have those items on hand.

And if you do, you can make these Oreo bars in 5 minutes without a mixer and they’re ready in a half hour. Love pans of bars for that reason. Fast, easy, no dough to chill.

Loaded M&M Oreo Cookie Bars - Stuffed to the max with M&Ms and Oreos! Easy, no-mixer recipe that's ready in 30 minutes. Always a hit at parties!

I used my easy, no-mixer, go-to blondie recipe that has served me so well over the years, and I adapted it this time by stirring in chopped Oreos and sprinkling on M&M’s. It’ll seem like there are more Oreos than batter, and that’s correct. Such a such a good problem to have.

I used Birthday Cake Oreos, which have birthday cake flavored-filling, but don’t go out of your way for them. They hardly seem different from original Oreos to me.

The Oreo bars are dense, thick, and packed with texture. The Oreos soften slightly while baking, but retain some crunch.

The crunchy shells of the M&M’s, contrasted with Oreos, and the soft, buttery, moist blondie dough is a texture lover’s dream. Shopping in my own pantry and widdling down my ingredients before moving was a packer’s dream.

And my family was pretty happy when they had a taste of my pantry clean-out endeavors. They’re tailor-made for your trashy eating enjoyment. Live a little, it’s fun!

Loaded M&M Oreo Cookie Bars - Stuffed to the max with M&Ms and Oreos! Easy, no-mixer recipe that's ready in 30 minutes. Always a hit at parties!

What’s in These Oreo Bars?

To make these Oreo and M&M’s cookie bars, you’ll need:

  • Unsalted butter
  • Egg
  • Light brown sugar
  • Vanilla extract
  • All-purpose flour
  • Oreo cookies
  • M&M’s
Loaded M&M Oreo Cookie Bars - Stuffed to the max with M&Ms and Oreos! Easy, no-mixer recipe that's ready in 30 minutes. Always a hit at parties!

Melt the butter, then whisk in the egg, brown sugar, and vanilla. Add the flour and mix until just combined. Then, fold in then crushed Oreos. 

Turn the batter into a greased 8×8-inch pan. Sprinkle with M&M’s just before baking. 

Bake these Oreo bars until a toothpick inserted in the center (if you can find a bare patch to test) comes out clean, or with a few moist crumbs, but no batter.

Loaded M&M Oreo Cookie Bars - Stuffed to the max with M&Ms and Oreos! Easy, no-mixer recipe that's ready in 30 minutes. Always a hit at parties!

Can I Use Different Flavors of Oreos?

Yes! Use whatever variety of Oreos you have on hand. Different flavors of Oreos will work here, as will Double Stuf. 

Can I Use Different Flavors of M&M’s? 

Yes again! Any kind of M&M’s can be used in these Oreo and M&M’s cookie bars. 

Loaded M&M Oreo Cookie Bars - Stuffed to the max with M&Ms and Oreos! Easy, no-mixer recipe that's ready in 30 minutes. Always a hit at parties!

Can I Use Granulated Sugar Instead of Brown Sugar?

No, you must use light brown sugar in this recipe. Granulated sugar isn’t sticky enough, which will result in a different texture. 

Can I Double This Recipe? 

Most likely, yes. You’d need to bake the Oreo bars in a 9×13-inch baking pan. 

Loaded M&M Oreo Cookie Bars - Stuffed to the max with M&Ms and Oreos! Easy, no-mixer recipe that's ready in 30 minutes. Always a hit at parties!

Store these Oreo cookie bars in an air-tight container at room temperature. They’ll last about a week. 

Loaded M&M Oreo Cookie Bars - Stuffed to the max with M&Ms and Oreos! Easy, no-mixer recipe that's ready in 30 minutes. Always a hit at parties!

Can I Freeze These Oreo Bars? 

Yes, but just note that M&Ms can sometimes lose their color and bleed a bit upon freezing. 

Loaded M&M's Oreo Bars — Stuffed to the max with M&M's and Oreos! These Oreo cookie bars are an easy, no-mixer recipe that's ready in 30 minutes. Always a hit at parties!

Tips for Making Oreo Bars

If you don’t have Oreos or M&M’s, shop in your own pantry for what you do have. 

Graham crackers, 4-day old leftover chocolate chip cookies that are past their prime, leftover fun-sized candy bars from last Easter, the remains of your last impulse buy at Trader Joe’s like chocolate-covered pretzels or that tub of mini peanut butter cups you’ve been snacking on at midnight, or the nearly empty bag of white chocolate chips that you grab a handful of every time you walk past the cupboard.

You get the point. Don’t buy anything if you don’t have to. Sure, the Oreos and M&M’s are great but so are a lot of other things. Use the recipe as an opportunity to use up your odds and ends.

Loaded M&M Oreo Cookie Bars - Stuffed to the max with M&Ms and Oreos! Easy, no-mixer recipe that's ready in 30 minutes. Always a hit at parties!

Edited to add: This recipe, and my name, appeared on the COVER of Taste of Home Magazine, September 2014. They used their in-house photographer rather than using mine. Facebook post about it here.

Loaded M&M Oreo Cookie Bars - Stuffed to the max with M&Ms and Oreos! Easy, no-mixer recipe that's ready in 30 minutes. Always a hit at parties!

Loaded M&M's Oreo Bars — Stuffed to the max with M&M's and Oreos! These Oreo cookie bars are an easy, no-mixer recipe that's ready in 30 minutes. Always a hit at parties!

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4.62 from 118 votes

Loaded M&M's Oreo Cookie Bars

By Averie Sunshine
Stuffed to the max with M&M's and Oreos! These Oreo bars are an easy, no-mixer recipe that's ready in 30 minutes. Always a hit at parties!
Prep Time: 5 minutes
Cook Time: 20 minutes
Cooling Time: 30 minutes
Total Time: 55 minutes
Servings: 9
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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
  • 18 Oreo Cookies, coarsely chopped*
  • about 1/2 cup M&M’s, I used plain, use your favorite flavor or other chopped candy

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 and stir until just combined, don’t overmix.
  • Stir in the Oreos.
  • Turn batter out into prepared pan, smoothing the top lightly with a spatula.
  • Evenly sprinkle the M&M's over the top, lightly pressing them down with your finger or a spatula.
  • Bake for about 20 to 22 minutes, or until done based on add-ins used. Top should be set and edges slightly firm. A toothpick inserted in the center (if you can find a bare patch to test) should come out clean, or with a few moist crumbs, but no batter.
  • Allow bars to cool in pan for at least 30 minutes before slicing and serving.

Notes

  • *Note: I used Oreo Chocolate Birthday Cake Sandwich Cookies; another type of chocolate sandwich cookie may substituted, or about 2 heaping cups of coarsely chopped add-ins including leftover cookies, graham crackers, chocolate-covered pretzels, etc.
  • 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: 394kcal, Carbohydrates: 56g, Protein: 3g, Fat: 18g, Saturated Fat: 9g, Polyunsaturated Fat: 4g, Cholesterol: 49mg, Sodium: 112mg, Fiber: 1g, Sugar: 37g

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

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Welcome to AverieCooks! Here you’ll find fast and easy recipes that taste amazing and are geared for real life. Nothing fussy or complicated, just awesome tasting dishes everyone loves!

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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.

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Comments

  1. I’ve made these quite a few times now, and they never get old. It’s ridiculous how easy they are, especially when you consider how good they are, and how happy they make everyone who tries them. I’m not a big fan of store bought, simply because I enjoy baking, but sometimes I don’t have the time/patience for a more complicated and/or time consuming recipe. With this recipe I have no excuse but to make my own baked goods!

    I love that you can just sort of throw in whatever leftover candy and cookies you have. Tonight’s version involved Oreos, Reese’s Pieces, peanut butter chips, and Whoppers. One of my coworkers calls them “trash bars” because of all the random add ins. But she uses this term lovingly, she’s the biggest fan of these I know :)

    I’ve also made your peanut butter version. Equally easy and delicious!! Thank you!

      1. on the COVER?! nbd. congrats!! and thanks again for this wonderful recipe. got another batch in the oven as I type this!

  2. Hi….so as an absolute amateur baker I made these for the first time yesterday and cannot tell you how easy they are to make and how delicious they are. I used chocolate chips instead.
    I was a little scared when I prepared the batter as it was way to dark in colour but while baking the brownies came out perfect.
    Thanks for this simpls recipe

  3. I made the recipe and followed every step but the dough keeps very wet on the bottom… And I mean VERY wet. After two hours of letting it rest and cooling down I put it twice on 100degr for 10min extra but stil nothing. A little bit disappointed but I’ll just take the chops with me to competition tomorrow and let my testpanel judge… ;-)

    1. Sounds like you maybe needed to bake a bit longer during the originial baking time. After you let something cool, then putting it back into the oven for 10 mins or so, doesn’t always work. Bake a bit longer next time perhaps given your oven, climate, pan, etc. Thanks for trying the recipe.

  4. I just want to say that I have made this twice in two days… I LOVE them!! Absolutely love them!
    It’s not the ordinary kind of baked goods one see here in Denmark. So I sure am glad that I found this recipe.
    Thank you so much!

    1. Thanks for trying them (twice in two days!) That’s wonderful that they’re a success and thanks for reading all the way from Denmark!

  5. I made the left overs bars for our camping trip tomorrow I used gram cereal, peanuts, snickers, butterfinger, chocolate bars and heath chips I cant wait to try them :D

    1. You could, yes, but I don’t know if it would taste quite the same or with the same texture. I recommend maybe half the amount as whole wheat so the taste/texture doesn’t change too much.

  6. Finally unpacked and settled enough to bake – whew! I’m making a double batch of these (I used an entire oreo bag plus an entire m&m bag) to impress my hubby’s classmates tomorrow. Your recipes never let me down. :-)

    1. Thanks for trying this recipe and for saying that my recipes never let you down. This is one of my most popular recipes ever and people seem to love these things so hopefully your hub’s classmates do, too! With a whole pkg of Oreos and bag of M&Ms, it would be hard for them to resist these I’d imagine :)

  7. You have just made half of my family happy! I want to thank you for your wonderful recipe, I made it for a baby shower and now its being requested so much I am making “just because” gifts! Thanks for making me think I can truly bake!

  8. First of all, your photography is to. die. for. amazing. Anyway, if I wanted to make extra and do it in a 9×13, I’m assuming I should just double the recipe?

    1. I haven’t ever doubled this recipe but yes, usually 8×8 doubles very well in a 9×13. Thanks for the compliments on my photography!

  9. These bars look so good! I can’t believe it was as simple as just wanting to clean out your cupboards to come up with the idea! I should try that to see what fun creations I could come up with. They sound very simple to make and like there isn’t too many ingredients. For those of us who are learning to cook and bake, simple and few ingredients is the best way to learn, at least for me it is. I can’t wait to try these bars. I was also surprised that the total cook time was only 30 minutes. It seemed like it should have been longer, but the shorter the cook time the sooner you get to eat. There were many other bars you posted pictures of on this blog that look like they would be very good to try as well. I think that they would be extremely delicious with ice cream! The smore brownie looked especially good since I am a big fan of smores in the first place. Well looking at this site it made me very hungry! Keep posting your delicious looking desserts so we can enjoy making them because they look amazing and good!

  10. I threw in mini M&Ms, Cookie Crisp cereal, and chocolate chips in the batter. They’re in the oven now! I’m a little nervous though… the consistency came out more like cookie dough than brownie batter.

    1. It IS more like cookie dough. There’s nothing brownie batter about it. It’s very thick! You’re fine :) Enjoy!

  11. I made these yesterday and gave them to my friends- everyone loved them! They’re so delicious and they were really simple to make which is great considering I mess up everything in the kitchen. They looked beautiful too.

    1. Yes you probably could but this dough is so easy, literally takes about 3 mins to stir together, and bite for bite, it’s so much cheaper than storebought, you know what’s in it, i.e. real ingredients, and the recipe was tested using scratch dough in terms of baking time and add-ins it’ll hold.