Have you seen OREO Marshmallow Bars? Well, No Bake Nutter Butter Marshmallow Bars are even better! They’re made with crushed Nutter Butter cookies mixed into melted butter and marshmallows, and you can take them up a notch with drizzles of melted chocolate chips on top for that chocolatey peanut butter flavor. So, so yummy!

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
What do you need to make these Nutter Butter Bars?
This takes just THREE ingredients!
- 1 package Nutter Butter 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 Cookie Marshmallow Bars?

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 Nutter Butter cookies. Or, you can put them in a ziplock bag and run a rolling pin or glass over them until they’re crushed.
Melt the butter in a microwave-safe bowl.

Add marshmallows to the bowl and mix into the butter.

Microwave the marshmallows in 30-second increments, stirring after each time, until the marshmallows are completely melted and gooey.

When the marshmallows are melted, pour the Nutter Butter 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.
If you want to get fancy, melt about 1/2 cup chocolate chips in the microwave in a microwave-safe bowl.
Melt them in 30-second increments stirring after each time, until they are smooth.
Then, drizzle the chocolate with a spoon or transfer to a zipper baggie and snip off a tiny bit of corner and drizzle them this way.

Then, cut your bars into squares and serve. I swear these are better than the OREO cookie bar version.

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 Marshmallow Recipes
- Movie Marshmallow Bars
- The EASIEST Air Fryer S’mores Dip
- Chocolate Golden Crisp® Gooey Bars
- Homemade Peppermint Marshmallows
- Peanut Butter Pudding Cookies
- Blue’s Clues Rice Krispies Treat Pops
- PEEPS Rice Krispies Treats in the Oven
More Easy Desserts
- Easy and Delicious Fudge Stuffed Cookie Bars
- Clifford the Big Red Dog Red Blondie Bars
- Galaxy Cheesecake Bars
- Gooey Unicorn Bars
- Chocolate Peppermint Sugar Cookie Bars
- Gluten Free Cheerios Bars

Nutter Butter Marshmallow Bars
Ingredients
- 1 package Nutter Butter cookies
- 16 oz bag marshmallows
- 4 tablespoons butter
- optional: 1/2 cup chocolate chips
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 Nutter Butter cookies. Or, you can put them in a ziplock bag and run a rolling pin or glass over them until they're crushed.
- Melt the butter in a microwave-safe bowl.
- Add marshmallows to the bowl and mix into the butter.
- Microwave the marshmallows in 30-second increments, stirring after each time, until the marshmallows are completely melted and gooey.
- When the marshmallows are melted, pour the Nutter Butter 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.
- If you want to get fancy, melt about 1/2 cup chocolate chips in the microwave in a microwave-safe bowl.
- Melt them in 30-second increments stirring after each time, until they are smooth.
- Then, drizzle the chocolate with a spoon or transfer to a zipper baggie and snip off a tiny bit of corner and drizzle them this way.
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