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If you love rich, fudgy brownies topped with a creamy cookies‑and‑cream cloud, these Delicious Oreo Brownies with 3‑Ingredient Oreo Frosting are about to become your new favorite dessert. The brownies are thick, chocolatey, and loaded with crushed Oreos — but the real star is the 3‑ingredient Oreo frosting made with sweetened condensed milk. It creates the silkiest, creamiest, most luscious Oreo frosting ever, and it spreads like a dream over the fudgy brownie base.

More Oreo desserts include these Ultimate Oreo Cupcakes, these Gummy Worm Dirt Brownie Cookies, these Frankenstein & Bride Brownies and these Easy Mississippi Mud Oreo Brownies! Ready to learn how to make Oreo brownies?

Why You’ll Love These Oreo Brownies

Super fudgy brownies with rich chocolate flavor
Sweetened condensed milk Oreo frosting that’s creamy, smooth, and irresistible
Only 3 ingredients in the frosting
Loaded with Oreos in every layer
Perfect for parties, birthdays, potlucks, and Oreo lovers
Freezer‑friendly and great for make‑ahead treats

The Key to Delicious Brownies Is This Easy Oreo Frosting

The key to making these brownies unforgettable is the easy Oreo frosting made with sweetened condensed milk. Have you ever tried a homemade frosting that doesn’t use powdered sugar? This one is perfect for those moments when you’re out of powdered sugar and when you want a simple, ultra‑creamy frosting with minimal ingredients.

This Oreo frosting uses just three ingredients: softened butter, sweetened condensed milk, and crushed Oreos. That’s it — and the texture is incredible.

You will need a mixer for this recipe, because whipping the butter properly is what gives the frosting its thick, silky structure. Plan on mixing the butter for 8–12 minutes until it’s pale and fluffy. Then you’ll slowly add the sweetened condensed milk and fold in the crushed Oreos. It’s easy, it’s dreamy, and it spreads beautifully over fudgy brownies.

brownies with oreo frosting - easy recipe with sweetened condensed milk

Ingredients for Oreo Brownies – Make Homemade or Boxed Version

Homemade Brownie Recipe with Chocolate Oreos

unsalted butter , melted
granulated sugar
eggs
vanilla extract
unsweetened cocoa powder
all-purpose flour
salt
baking powder
Oreo Cookies

Shortcut Oreo Brownies Recipe, If Using Boxed Brownie Mix

Betty Crocker Fudge Brownie Mix
water or milk of choice
vegetable oil
eggs
Oreo Cookies

Easy 3 ingredient Oreo frosting

unsalted butter, softened
sweetened condensed milk
crushed Oreos

brownies with oreo frosting - easy recipe with sweetened condensed milk

Instructions How to Make Homemade Oreo Fudgy Brownies Recipe

Preheat oven to 350 degrees.
Spray an 8×8 inch baking pan with non-stick cooking spray. Line with parchment paper for easier removal, if desired.
In a large bowl, whisk together cooled melted butter, sugar, eggs, and vanilla extract.
Whisk in the unsweetened cocoa powder, flour, baking powder and salt until until well blended.
Pour half of the brownie batter in pan and cover with a layer of Oreo cookies.
Pour rest of batter on top of brownies and spread out brownie batter.
Bake for 25-30 minutes.
Let brownies cool, before frosting.

How to Make Boxed Mix Brownies with Oreos

Preheat oven to 350 degrees.
Spray an 8×8 inch or 9×9 inch baking pan with non-stick cooking spray. Line with parchment paper for easier removal, if desired.
Stir brownie mix, water/milk, oil and eggs in medium bowl until well blended.
Pour half of the brownie batter in pan and cover with a layer of Oreo cookies.
Pour rest of batter on top of brownies and spread out brownie batter.
For 8×8 pan, bake 45-50 minutes and a 9×9 pan, bake 32-36 minutes (best using boxed instructions).
Let brownies cool, before frosting.

How to Make Easy 3 ingredient Oreo Frosting

Beat the softened butter until it turns pale yellow to white in color for 8-12 minutes, frequently scraping the bowl to allow even mixing of the butter.
Once the butter is pale colored, start adding your condensed milk in about 2-3 batches mixing well. Scrape before each addition.
Finally add the crushed Oreos and continue beating for a minute and then switch over to a spatula and do the final mixing until everything is combined.
Pipe or spread the frosting on top evenly.
Sprinkle the tops of the brownies with mini Oreos, Oreo chunks or Oreo crumbs or a combination of all! Slice and serve!

Oreo Frosting Pro Tips

You will definitely need a mixer for this frosting! It takes about 8-12 minutes to whip the butter, to set the frosting up for the correct consistency, when you add the sweetened condensed milk and crushed Oreos and that’s easy!
Make sure your butter is at softened at room temperature. You want it softened so it can properly incorporate the condensed milk.
Add the sweetened condensed milk slowly, in 3 or 4 batches, mixing in-between in addition.
If you don’t beat the butter until it becomes pale white, the frosting will not thicken up, which would probably be ok on these brownies, but if you wanted to use on cupcakes, you wouldn’t be able to pipe it and it also helps to chill the frosting in the fridge 10-20 minutes before piping the frosting as you would cream cheese frosting.

How to Store Oreo Brownies with 3 ingredient Oreo Frosting

Room Temperature

Store in an airtight container for 2–3 days.

Refrigerator

Keeps for up to 1 week and gives the frosting a thicker, creamier texture.

Freezer

Freeze slices (frosted or unfrosted) for up to 3 months.
Thaw at room temp or enjoy chilled.

Tips for the Best Oreo Brownies

Don’t overbake — fudgy brownies are key
Crush Oreos finely for a smooth frosting
Add extra chopped Oreos on top for crunch
Line the pan with parchment for clean slicing
Chill the frosted brownies for cleaner cuts

More Variations

Double‑Stuff Oreo Brownies: Use Double Stuf Oreos in the batter and frosting
Mint Oreo Brownies: Swap in Mint Oreos
Peanut Butter Oreo Brownies: Add peanut butter chips
Cookies‑and‑Cream Brownie Bars: Add white chocolate chips

The delicious combination of fudgy, chewy brownies and smooth, creamy Oreo frosting is sure to leave your taste buds wanting more of this rich chocolate flavor! They’re a treat that everyone can enjoy, and they prove that you don’t have to be an expert baker to make and enjoy this delicious dessert.

Not only is it simple to make, but it’s also a great treat to have on hand when you’re in the mood for something sweet, like this Super Easy Chocolate Cake Recipe with Chocolate Frosting. Enjoy!

More Oreo Lovin’ Desserts!

Delicious Oreo Brownies with Best 3 Ingredient Oreo Frosting

Kim Lange

What's better than Oreos? Delicious Oreo Brownies with Best Oreo Frosting of course! It's hard to resist these dreamy chocolate brownies are triple loaded with Oreos in the brownies, in the 3 ingredient Oreo frosting and on top!

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Prep Time 15

Cook Time 30

Course Dessert

Servings Servings

Calories

Ingredients

Ingredients for Oreo Brownies - Make Homemade or Boxed Version

Homemade Chocolate Oreo Brownies Recipe

½ cup unsalted butter melted
1 cup sugar
2 large eggs
2 teaspoons vanilla extract
⅓ cup unsweetened cocoa powder
½ cup flour
¼ teaspoon salt
¼ teaspoon baking powder
9-16 Oreo cookies

Shortcut Oreo Brownies Recipe If Using Boxed Brownie Mix

Betty Crocker Fudge Brownie Mix
3 tablespoons water or milk of choice
½ cup vegetable oil
2 large eggs
9-16 Oreo cookies

Easy Oreo Buttercream Frosting

1 cup unsalted butter softened
1 can sweetened condensed milk
⅔ cup crushed Oreos
Oreos for Garnishing Top brownies with mini oreos, oreo chunks or oreo crumbs or a combination of all!

US Customary - Metric

Instructions

How to Make Homemade Oreo Brownie Recipe

Preheat oven to 350 degrees.
Spray an 8x8 inch baking pan with non-stick cooking spray. Line with parchment paper for easier removal, if desired.
In a medium bowl, whisk together cooled melted butter, sugar, eggs, and vanilla extract.
Whisk in the unsweetened cocoa powder, flour,baking powder and salt until until well blended.
Pour half of the brownie batter in pan and cover with a layer of Oreo cookies.
Pour rest of batter on top of brownies and spread out brownie batter.
Bake for 25-30 minutes.
Let brownies cool, before frosting.

How to Make Boxed Oreo Brownie Mix

Preheat oven to 350 degrees.
Spray an 8x8 inch or 9x9 inch baking pan with non-stick cooking spray. Line with parchment paper for easier removal, if desired.
Stir brownie mix, water/milk, oil and eggs in medium bowl until well blended.
Pour half of the brownie batter in pan and cover with a layer of Oreo cookies.
Pour rest of batter on top of brownies and spread out brownie batter.
For 8x8 pan, bake 45-50 minutes and a 9x9 pan, bake 32-36 minutes (best using boxed instructions).
Let brownies cool, before frosting.

Easy Oreo Buttercream Frosting

Beat the softened butter until it turns pale yellow to white in color for 8-12 minutes, frequently scraping the bowl to allow even mixing of the butter.
Once the butter is pale colored, start adding your condensed milk in about 2-3 batches mixing well. Scrape before each addition.
Finally add the crushed oreos and continue beating for a minute and then switch over to a spatula and do the final mixing until everything is combined.
Pipe or spread the frosting on top evenly.
Top brownies with mini oreos, oreo chunks or oreo crumbs or a combination of all!