No-Bake Chewy Oreo Bars are dessert bars that are made with a mixture of chopped Oreo cookies, mini marshmallows, and butter. It’s a simple recipe to throw together for a potluck or anytime you need to bring a dessert or treat to share. Better yet, the bars are made with just three ingredients and are a no-bake dessert, so there is no need to turn on the oven! Be sure to check out my other No-Bake desserts for more tasty treats!

Stacked Oreo Bars
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Ingredients & Substitutions

As I stated above, this recipe is made with just three simple ingredients! 

Oreos: I went with the double-stuffed Oreo cookies in this recipe and chopped them up with a knife, filling and all. Crushing them or using a blender would have made the pieces too fine. (But, if you wanted smaller crumbs in the bars, you could still add bigger chunks of Oreos on top.) You could also use regular stuffed Oreo cookies or a combination of the two. 

MarshmallowsI used a 10.5-ounce bag of mini marshmallows. If you use regular-sized marshmallows, you would need approximately 40 of them to equal the bag of mini marshmallows.

ButterUse salted butter that is at room temperature.

Ingredients for Oreo Bars

Can I Use a Different Size Pan?

I made the Oreo Bars in an 8×8-inch baking dish. You could use a 9×9-inch pan if that is the smallest you have on hand. The bars will be a little thinner, but I don’t think anyone will complain; they will still be a tasty treat!

Overhead of Oreo Bars in Baking Dish

How to Store Chewy Oreo Bars

Store the bars in an airtight container at room temperature. They are best enjoyed within three days of making them. After that, they can begin to harden.

Hand Pulling Oreo Bar Apart

Can I Freeze Chewy Oreo Bars?

No, I would not recommend freezing these bars. The marshmallows in the dessert bars would not thaw well, resulting in a not-so-tasty treat. But, they are so easy to make, you could whip these up in no time when you are craving them or need a quick dessert.

More Oreo Treats

4.34 from 3 votes

No-Bake Chewy Oreo Bars

Prep Time 10 minutes
Chilling Time 2 hours
Total Time 2 hours 10 minutes
No-Bake Chewy Oreo Bars are dessert bars that are made with a mixture of chopped Oreo cookies, mini marshmallows, and butter.



  • Spray an 8×8-inch baking dish with nonstick cooking spray or line with parchment paper. Set aside.
  • In a large microwave-safe bowl, combine marshmallows and butter.
  • Melt the marshmallows and butter in the microwave in 30-second intervals, stirring in between, until melted (about 2 minutes).
  • Add chopped Oreos (reserving ¼ cup for the topping) to the marshmallow mixture and stir.
  • Pour mixture into the prepared 8×8-inch pan and press into the pan with a spatula. Top with reserved chopped Oreo cookies.
  • Place pan in the refrigerator to set for at least 2 hours, up to overnight.


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Meet Amanda Rettke

Amanda Rettke is the creator of I Am Baker, and the bestselling author of Surprise Inside Cakes: Amazing Cakes for Every Occasion – With a Little Something Extra Inside.Over the course of her 15+ year blogging adventure, she has been featured in and collaborated with the Food Network, New York Times, LA Times, Country Living Magazine, People Magazine, Epicurious, Brides, Romantic Homes, life:beautiful, Publishers Weekly, The Daily Mail, Star Tribune, The Globe and Mail, DailyCandy, YumSugar, The Knot, The Kitchn, and Parade, to name a few.

Reader Comments

  1. We don’t have double stuff Oreos where I live just regular. I was thinking that I would need to either use a bit more marshmallows or else a big spoon or two of vanilla frosting. What would be your best guess?

  2. After extensive searching and effort here are the results. Recipe as is yields a softer/chewier product falling on the very sweet side. Using regular Oreos yields a dryer/crunchier bar that is both less sweet and more chocolatie. Using regular Oreos and adding 3 generous tablespoons of vanilla frosting (I use homemade) to your melted marshmallows will result in bars closer to the texture and flavour of the original, but a bit more chocolate and a bit sweeter still. Finally, using regular Oreos but using an extra cup of marshmallows yields a soft/chewy more chocolatie but less sweet bar. I had no issues with freezing any of them, but don’t recommend eating them frozen.

  3. These bars are so delicious. I made them for my son’s homecoming dinner and the teenagers ate them up! Some of the parents may have snuck some too 😉

  4. I just made these and they are in the refrigerator. I am taking to a friend tomorrow, so don’t know how they will taste. I wanted to comment that this recipe must be pre-Covid inflation because both the mini marshmallow bag and the Oreo bag were under the ounces measurement you sited. I didn’t stress as the reduction seemed proportional. Just wanted you to know, in case the manufacturers continue to reduce their standards.

  5. I really wanted to make these, but since the measurements aren’t ones that are used in 90% of the world, I am unable. It wouldn’t hurt to put measurements in metric for the 7.5 billion people who don’t live in the States.

    1. I literally have OUNCES in the post, which by your criteria, would include everyone in the world. Please feel free to read.

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