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Oreo Brownies

These Oreo brownies will be a favorite of any Oreo lover you know! Fudgy homemade brownies get an instant upgrade with the addition of fluffy Oreo frosting and bits of Oreo cookies throughout. 

Oreo brownies stacked on tray with whole Oreo cookies

It’s always fun creating fancied up versions of brownies, whether it’s cookie butter cheesecake brownies, peanut butter chip brownies, or hazelnut mocha brownies. Today’s Oreo brownies have Oreo pieces in the batter, in the rich frosting, and on the top, making them a triple threat of cookies-and-cream goodness! 

Why You’ll Love This Oreo Brownies Recipe

  • Oreo flavor, in brownie form. This recipe takes the classic cookies-and-cream flavor of Oreos and transforms them into a fudgy, decadent brownie. You’ll get to enjoy the Oreo taste you love in a new way!
  • Perfect balance of textures. The rich brownie base, creamy frosting, and crunchy Oreos on top give you contrasting textures that keep this dessert from feeling one-note.
  • Easy to make. This recipe is beginner-friendly; although there are two different components involved, each is simple and straightforward. (New to baking? Be sure to read my Baking Tips for Beginners!)

What You’ll Need

Scroll down to the recipe card to find the ingredient quantities and recipe instructions.

Overhead view of ingredients for Oreo brownies

For the Brownies:

  • Unsalted butter – Learn more: Unsalted or Salted Butter: Which is Better for Baking?
  • Unsweetened chocolate – Here’s what you need to know about the different types of chocolate.
  • Unsweetened cocoa powder – Use natural cocoa powder for a classic brownie flavor, or Dutch-process cocoa for a little more richness.
  • Granulated sugar
  • Eggs – Let these come to room temperature for easier mixing. I recommend baking with large eggs.
  • Vanilla extract – You can use homemade vanilla extract or store-bought.
  • All-purpose flour – Here’s how to measure flour for baking. 
  • Salt
  • Oreo cookie pieces – You’ll need both the cookie and the cream from approximately 10 to 12 cookies to mix into the brownie batter.
Overhead view of ingredients for Oreo frosting

For the Frosting:

  • Unsalted butter
  • Confectioners’ sugar – Also known as powdered sugar.
  • Milk – Any kind you have on hand; even a plant-based milk will work.
  • Vanilla extract
  • Salt – Just a touch, for balance.
  • Finely crushed Oreos – Plus some additional cookies for garnish, if desired.

What’s the Best Way to Make Oreo Crumbs for a Recipe?

I find that the best way to make Oreo crumbs is to put the cookies in a food processor and pulse until the crumbs reach your desired texture. You can also crush them in a plastic zip-top bag by using a rolling pin. 

How to Make Oreo Brownies

To Make the Brownies:

  • Prepare. Preheat your oven to 350°F. Line a 9-inch square baking pan with parchment paper and lightly spray the pan with a nonstick cooking spray with flour.
  • Melt the chocolate and butter. Place the butter and chocolate in a microwave-safe bowl. Microwave at half-power in 30-second increments until the butter has melted and the chocolate melts when you stir. Continue to stir until the mixture is smooth, then set aside to cool a bit.
  • Finish the batter. Whisk in the cocoa powder, followed by the sugar, and then the eggs and vanilla. Mix in the flour and salt. Fold in the Oreo pieces.
  • Bake. Spread the brownie batter into the prepared pan. Bake for 30 to 35 minutes, or until a pick inserted into the center comes out with just a few moist crumbs. 
  • Cool. Set the pan on a wire rack and allow the brownies to cool completely.

To Make the Frosting:

  • Mix the butter and sugar. Use an electric mixer on medium speed to beat the butter until it’s creamy. Slowly add the confectioners’ sugar, mixing until smooth.
  • Add the liquid ingredients and salt. With the mixer on low speed, beat in the milk, vanilla, and salt. 
  • Finish the frosting. Increase the mixer speed to high and beat the frosting until it’s fluffy and smooth. Fold in the cookie crumbs.
  • Frost. Spread the frosting onto the cooled brownies and top them with cookie pieces, if desired.
Oreo brownies on tray, with bite taken out of one

Tips for Success

  • Soften the butter for the frosting. Trying to beat cold butter doesn’t work very well! Let it soften at room temperature so it mixes evenly into the other ingredients and has a light, airy texture. Learn more: How to Soften Butter
  • Sift the confectioners’ sugar. This will keep little white lumps out of your Oreo frosting.
  • Don’t over-bake. You do want some moist crumbs on the toothpick when you test these Oreo brownies for doneness. If the toothpick is completely dry, your brownies will be, too.
  • Use good quality chocolate. The better the chocolate, the better your brownies will taste.
  • Adjust the frosting consistency if needed. If your frosting is too thick to spread, you can add small amounts of milk until it reaches the desired consistency. 
  • Learn more about baking brownies. Here are all my best tips: Tips for Baking Brownies from Scratch
Overhead view of Oreo brownies on tray with whole Oreo cookies

Variations

  • Add in some chocolate chips or white chocolate chunks for added texture and flavor.
  • Swap the frosting for chocolate ganache or a simple glaze.
  • Experiment with different Oreo flavors. I think Oreo brownies made with peanut butter Oreos would be delicious!

How to Store

Oreo brownies can be kept in an airtight container in the refrigerator for up to 5 days. Unfrosted brownies will keep at room temperature for up to 3 days.

How to Freeze Oreo Brownies

Wrap unfrosted brownies tightly with plastic wrap and then place them in a freezer-safe bag or container. If the brownies are frosted, freeze them on a parchment-lined baking sheet first, until the frosting is solid, then wrap them. 

Oreo brownies can be frozen for up to 3 months. Thaw in the refrigerator before serving.

Oreo brownies on parchment lined board

More Reader Favorite Brownie Recipes

Oreo Brownies

Yield 16 2-inch brownies
Prep Time 20 minutes
Cook Time 35 minutes
Total Time 55 minutes

Oreo brownies are fudgy and rich, with fluffy Oreo frosting and bits of Oreo cookies throughout. And they're easy to make too!

Overhead view of Oreo brownies on tray with whole Oreo cookies

Ingredients

For the brownies:

  • 3/4 cup (170g) unsalted butter
  • 2 ounces (57g) unsweetened chocolate, roughly chopped
  • 1/4 cup + 2 tablespoons (31g) unsweetened cocoa powder
  • 1 & 3/4 cups (350g) granulated sugar
  • 3 large eggs
  • 1 teaspoon vanilla extract
  • 1 cup (120g) all-purpose flour
  • 1/2 teaspoon salt
  • 1 to 1 & 1/2 cups Oreo cookie pieces (approximately 10 to 12 cookies)

For the frosting:

  • 1/2 cup (113g) unsalted butter, softened
  • 1 & 1/2 cups (165g) confectioners’ sugar, sifted
  • 2 tablespoons milk
  • 1 teaspoon vanilla extract
  • 1/4 teaspoon salt
  • 3/4 - 1 cup finely crushed Oreos (approximately 8 to 10 cookies)
  • more cookies for garnish (optional)

Instructions

To make the brownies:

  1. Preheat oven to 350°F. Line a 9-inch square baking pan and lightly spray the pan with a nonstick cooking spray with flour. If you plan to serve the brownies from the pan, skip the lining and just spray the pan.
  2. Place the butter and chocolate in a microwave-safe bowl. Heat in the microwave at half-power in 30-second increments until the butter has melted and the chocolate melts when stirred. Stir until smooth, and set aside to cool slightly. 
  3. Whisk in the cocoa powder, followed by the sugar, and then the eggs and vanilla. Then, mix in the flour and salt.
  4. Stir in the cookie pieces.
  5. Transfer the batter to the prepared pan, and spread it evenly. Bake 30 to 35 minutes, or until a pick inserted into the center comes out with a few moist crumbs. 
  6. Set the pan on a wire rack, and allow the brownies to cool completely.

To make the frosting:

  1. Using an electric mixer on medium speed, beat the butter until creamy. Slowly add the confectioners’ sugar, and mix until smooth.
  2. With the mixer on low speed, add the milk, vanilla, and salt, and mix until combined. If your frosting is too thick to spread, you can add small amounts of milk until it's the desired consistency. 
  3. Increase the mixer speed to high and beat the frosting until fluffy and smooth.
  4. Fold in the cookie crumbs.
  5. Spread the frosting over the cooled brownies, and top with more cookie pieces.

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    4 Comments on “Oreo Brownies”

  1. Is there no chocolate in the icing? Love your recipes. Thanks.

  2. Talk about turning a Sow’s ear into a silk purse! This over the top confection was a stunning dessert to come home to, after a Sushi dinner….The frosting was like nothing I’ve ever had., and the Oreo flavor was fantastic. In the brownie, and ON the brownie, we were in Oreo heaven. The brownie, strangely seemed familiar. Looking through my saved recipes it dawned on me that the brownie was something I had made at one time, and that it was Jennifer’s recipe….but in this case there was no frosting. So now I’ve got this ummmazing option to either bake the brownie with or without the frosting. I plan on doing both. Thank you for re-kindling my love of Oreo’s.

    • Hi, Jeff! I’m so glad you enjoyed the brownies! I did indeed start with one of my favorite brownie recipes when I made these. It worked so well with the Oreos that I couldn’t imagine changing anything else about it! I’m completely enamored with this frosting, so it may pop up here again someday. 🙂

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