If you love Rice Krispies Treats, you’re gonna love these No Bake OREO Cookie Marshmallow Bars. They’re made with crushed OREO cookies mixed into melted butter and marshmallows. So chocolatey and yummy!
![Title image with a close up of three OREO Marshmallow Bars stacked on top of each other on brown parchment paper.](https://justmicrowaveit.com/wp-content/uploads/2022/08/OREO-Marshmallow-Bars-pin-576x1024.png)
The best part of this recipe is that it’s totally no bake and has just a few ingredients. You melt the butter and marshmallows in the microwave and mix it all up and you’ve got a dessert that everyone will rave about.
Table of Contents
Ingredients to make OREO Dream Bars
![Ingredients to make these OREO Marshmallow Bars.](https://justmicrowaveit.com/wp-content/uploads/2022/08/oreo-marshmallow-bars-ingredients-1024x1024.png)
This takes just THREE ingredients!
- 1 Family Size package OREO cookies
- 16 oz bag marshmallows
- 4 tablespoons butter
I think that mini marshmallows melt the best in the microwave. The regular-sized ones tend to take a bit longer. So, I recommend the mini marshmallows when melting them in the microwave.
How do you make these OREO Bars?
Line an 8 x 8 pan with foil and spray it with non-stick oil spray.
![An 8 x 8 pan covered in foil.](https://justmicrowaveit.com/wp-content/uploads/2022/08/foil-8x8-pan-1024x1024.png)
Use a food processor or blender to crush the OREO cookies. Or, you can put them in a ziplock bag and run a rolling pin or glass over them until they’re crushed.
![A yellow bowl with crushed OREO cookie crumbs.](https://justmicrowaveit.com/wp-content/uploads/2022/08/crushed-oreos-1024x576.png)
Melt butter in a microwave-safe bowl.
![A glass bowl on a brown table with melted butter](https://justmicrowaveit.com/wp-content/uploads/2022/08/melted-butter-1024x576.png)
Add marshmallows to bowl and mix into the butter.
![A glass bowl full of marshmallows.](https://justmicrowaveit.com/wp-content/uploads/2022/08/marshmallows-glass-bowl-1024x1024.png)
Microwave in 30-second increments, stirring after each time, until the marshmallows are completely melted.
![A glass bowl full of melted marshmallows and butter mixed together with a wooden spoon.](https://justmicrowaveit.com/wp-content/uploads/2022/08/melted-marshmallows-1024x1024.png)
When the marshmallows are melted, pour the OREO cookie crumbs into the marshmallow mixture and mix everything up until they are completely combined.
![](https://justmicrowaveit.com/wp-content/uploads/2022/08/oreo-marshmallow-mixture.jpg)
Transfer the mixture to the 8 x 8 pan and use your hands to press it into place.
![An 8 x 8 pan covered in foil with the OREO marshmallow batter just transferred into it.](https://justmicrowaveit.com/wp-content/uploads/2022/08/oreo-marshmallow-bars-pan-1024x576.png)
Let it cool for an hour or two before cutting into squares.
![The marshmallow bars cut into 9 squares and sitting on brown parchment paper.](https://justmicrowaveit.com/wp-content/uploads/2022/08/oreo-marshmallow-bars-squares-cut-1024x576.png)
These bars would be perfect drizzled in melted chocolate, which you can do in the microwave! Check out my how-to guide to melt chocolate in the microwave!
![Close up of a hand holding an OREO Cookie Marshmallow Bar with bars in the background on brown paper](https://justmicrowaveit.com/wp-content/uploads/2022/08/oreo-marshmallow-bars-holding-square-1-1024x538.png)
These marshmallow bars are perfect for bake sales. You can easily package them up in ziplock bags or pretty cellophane bags. They will be a HUGE hit.
How do you store these bars?
I keep the leftovers, though there usually isn’t much left over, in a zipper baggie on the counter for 3-4 days.
Can you make these ahead of time?
I would recommend making them 1 to 2 days ahead of time. Otherwise, they might become stale.
More Easy No Bake Microwave Desserts
- How to make a Microwave Chocolate Cream Pie
- How to make Plain Cheesecake in the Microwave
- How to make a 2 Ingredient OREO Cake
- Chocolate Chip Banana Bread in the Microwave
- How to Make Microwave Monkey Bread
- Microwave Strawberry Upside Down Cake
![OREO Cookie Marshmallow Bars](https://justmicrowaveit.com/wp-content/uploads/2022/08/oreo-marshmallow-squares-close-735x413.png)
OREO Cookie Marshmallow Bars
Ingredients
- 1 package Family Size OREO cookies
- 16 oz package marshmallows
- 4 tablespoons butter
Instructions
- Line an 8 x 8 pan with foil and spray it with non-stick oil spray.
- Use a food processor or blender to crush the OREO cookies. Or, you can put them in a ziplock bag and run a rolling pin or glass over them until they're crushed.
- Melt butter in a microwave-safe bowl.
- Add marshmallows to bowl and mix into the butter.
- Microwave in 30-second increments, stirring after each time, until the marshmallows are completely melted.
- When the marshmallows are melted, pour the OREO cookie crumbs into the marshmallow mixture and mix everything up until they are completely combined.
- Transfer the mixture to the 8 x 8 pan and use your hands to press it into place.
- Let it cool for an hour or two before cutting into squares.
Nutrition Information:
Yield:
9Serving Size:
1Amount Per Serving: Calories: 212Total Fat: 5gSaturated Fat: 3gTrans Fat: 0gUnsaturated Fat: 2gCholesterol: 14mgSodium: 86mgCarbohydrates: 42gFiber: 0gSugar: 30gProtein: 1g
Any nutritional information on justmicrowaveit.com should only be used as a general guideline. This information is provided as a courtesy and there is no guarantee that the information will be completely accurate.
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