May 20, 2021

Oreo Marshmallow Treat Brownies

Name: Oreo Marshmallow Treat Brownies
Prep time: 15 min
Cook time: 25 min
Total time: 40 min
Ingredients: 3/4 cup butter; 3/4 cup baking cocoa; 1/4 cup strong coffee (prepared); 1-2/3 cups sugar; 2 eggs; 2 teaspoons vanilla extract; 1/2 teaspoon baking powder; 1/4 teaspoon salt; 1-1/3 cups flour; 1 15.35-ounce package Double Stuf Oreos; 1 15.35-ounce package Double Stuf Oreos; 5 cups marshmallows; 4 tablespoons butter; remaining Oreos from package used for brownies

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These Oreo Marshmallow Treat Brownies are what Oreo lovers dream about. A single pan of brownies that includes TWO packages of Double Stuf Oreos.

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Original content posted May 2016. Updated May 2021.

How do we feel about Oreos? And by we, I obviously mean you. I know how I feel about Oreos. Oreos are dangerous with a capital D. If they’re in my house, there is a strong magnetic pull between me and the package. Especially the Double Stuf ones.

And now look what I’ve gone and done. I’ve put not one, but TWO entire packages of Double Stuf Oreos into these Oreo Marshmallow Treat Brownies. Sorry, not sorry?

Oreo Marshmallow Treat, you say? It’s like your childhood favorite Rice Krispie Treat, minus the Rice Krispie, add Oreos. In other words, ah-maz-ing. Seriously. Marshmallow, butter, Oreos. There is absolutely no way you can go wrong with this scenario.

My One Bowl Chocolate Fudge Brownies have been transformed into an Oreo and marshmallow wonderland. Chocolately fudge brownie batter is topped with a layer of 24 Double Stuf Oreos before being baked into brownie deliciousness. They’re then topped with a layer of Oreo marshmallow treat mixture.

But wait! There’s more! Those leftover Oreos from the package you opened to top the brownie batter? We wouldn’t want them to go to waste, would we? Exactly. Instead, they’re crumbled on top of the marshmallow treat mixture. There you have it. Two entire packages of Oreos in one batch of brownies. Life goals, friends. Life goals.

Marshmallows and brownies are such a dynamic dessert duo that I’ve combined them in other recipes besides theses Oreo Marshmallow Treat Brownies as well. My Cherry Cola S’mores Brownies are a mashup of my favorite dessert and favorite soda and my Peanut Butter Cup Stuffed S’mores Brownies are a peanut butter and chocolate lovers dream come true.

How to Make Oreo Marshmallow Treat Brownies

[1] In a large saucepan over low heat, melt butter.

[2] Add cocoa and coffee to melted butter.

[3] Stir together to combine.

[4] Add sugar, eggs and vanilla to saucepan.

[5] Stir together until well combined.

[6] Add flour, baking powder and salt.

[7] Stir together until just combined

TIP: You’ll want to stir only until there are no dry ingredients visible.

[8] Pour batter into greased 9″ x 13″ baking pan and smooth into an even layer.

[9] Layer Oreos in a single layer over brownie batter, in four rows and six columns. Reserve remaining cookies for later.

Bake for at 350 degrees for 18-20 minutes or until just set.

[10] Add package of Oreos to bowl of food processor.

[11] Pulse cookies in food processor until they are coarse crumbs.

[12] Add marshmallows and butter to large saucepan.

TIP: I like to use the same saucepan that I used to make the brownies. Less dishes to wash and I figure nobody is going to complain about a little extra chocolate in the recipe!

[13] Stir marshmallows and butter together over low heat until melted and completely combined.

[14] Add Oreo crumbs to saucepan.

[15] Stir to combine.

[16] Remove brownies from oven.

[17] Press marshmallow mixture gently into an even layer over top of warm brownies.

[18] Crumble remaining Oreos over marshmallow treat mixture, gently pressing them in to adhere. Allow to cool completely before cutting.

If you’ve tried these Oreo Marshmallow Treat Brownies or any other recipe on Melanie Makes, please let me know your thoughts in the comments below. I love hearing from you and respond to each and every comment!

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4.84 from 6 votes