Ultimate Cookie Oreo Brownies Recipe: The Dessert Mashup Dreams Are Made Of
If you’ve ever stood in front of the dessert table wondering whether to grab a brownie, a cookie, or a handful of Oreos — this recipe is your ultimate solution. The Ultimate Cookie Oreo Brownies combine all three into one decadent, gooey, jaw-dropping dessert bar that will have everyone asking for seconds.
This triple-layer treat (also known as a “slutty brownie” or “brookie Oreo bar”) starts with a soft chocolate chip cookie dough base, topped with a generous layer of Oreos, and finished with rich, fudgy brownie batter. Every bite delivers buttery cookie, crunchy chocolate cookie crumbs, and melt-in-your-mouth brownie bliss.
Whether you’re baking for a party, a family get-together, or just craving something wildly indulgent, this is the dessert that says “go big or go home.”
Why You’ll Love These Oreo Cookie Brownies
- 🍪 Three desserts in one: Cookie + Oreo + Brownie = pure magic.
- 🍫 Fudgy and chewy perfection: Each layer brings its own texture and flavor.
- 🧈 Easy to make: No fancy baking skills required — just layer and bake.
- 🎉 Crowd-pleasing: Great for birthdays, potlucks, bake sales, or just self-care Sundays.
- 🥛 Perfect with milk: There’s nothing better than one of these brownies and a cold glass of milk.
What Are Cookie Oreo Brownies?
Cookie Oreo Brownies (or “Brookie Oreo Bars”) are a dessert mashup made from layers of classic cookie dough, Oreo cookies, and fudgy brownie batter. You can use homemade dough and brownies for maximum richness — or take shortcuts with pre-made mixes if you’re in a rush.
The result? A gooey, three-layer square that’s crisp on the edges, soft in the center, and loaded with chocolatey goodness.
Ingredients You’ll Need
For the Cookie Layer:
- ½ cup (1 stick) unsalted butter, melted
- ½ cup brown sugar
- ¼ cup granulated sugar
- 1 large egg
- 1 teaspoon vanilla extract
- 1 ¼ cups all-purpose flour
- ½ teaspoon baking soda
- ¼ teaspoon salt
- ½ cup chocolate chips
Middle Layer:
- 16 Oreo cookies (whole)
For the Brownie Layer:
- ½ cup (1 stick) unsalted butter, melted
- 1 cup granulated sugar
- 2 large eggs
- 1 teaspoon vanilla extract
- ⅓ cup unsweetened cocoa powder
- ½ cup all-purpose flour
- ¼ teaspoon salt
- ½ cup chocolate chips (optional for extra fudge factor)
Step-by-Step Instructions
Step 1: Preheat and Prepare Pan
Preheat oven to 350°F (175°C). Line an 8×8-inch baking pan with parchment paper, leaving some overhang for easy removal. Lightly grease with butter or spray.
Step 2: Make the Cookie Dough Layer
In a medium bowl, whisk together melted butter, brown sugar, and granulated sugar until smooth. Add egg and vanilla, whisking until creamy.
Stir in flour, baking soda, and salt. Fold in chocolate chips until just combined.
Press the cookie dough evenly into the bottom of the prepared pan — this forms your delicious, buttery base.
Step 3: Add the Oreo Layer
Arrange Oreo cookies in a single layer on top of the cookie dough. You can fit about 16 whole Oreos snugly (4 rows of 4). Don’t press them too deep — the brownie batter will fill in the gaps.
Step 4: Prepare the Brownie Batter
In a large mixing bowl, whisk together melted butter and sugar until glossy. Add eggs and vanilla, beating well until combined.
Sift in cocoa powder, flour, and salt. Mix just until the dry ingredients are fully incorporated (do not overmix). Fold in chocolate chips if desired.
Step 5: Assemble and Bake
Pour brownie batter evenly over the Oreos, spreading it gently with a spatula to cover all corners.
Bake for 35–40 minutes, or until the top is set and a toothpick inserted into the center comes out mostly clean (a few fudgy crumbs are okay).
Step 6: Cool and Slice
Let the brownies cool completely in the pan — at least 1 hour. For clean cuts, chill in the refrigerator for 30 minutes before slicing.
Cut into squares and marvel at those gorgeous triple layers!
Ultimate Cookie Oreo Brownies
Ingredients
Equipment
Method
- Preheat oven to 350°F and line an 8×8 pan with parchment paper.
- Mix melted butter, sugars, egg, and vanilla for cookie dough; add dry ingredients and chocolate chips. Press into pan.
- Arrange Oreo cookies in a single layer on top of the cookie dough.
- Make brownie batter: combine melted butter, sugar, eggs, and vanilla; add cocoa, flour, and salt. Pour over Oreos.
- Bake 35–40 minutes, cool completely, and slice into bars.
Notes
Tips for the Perfect Ultimate Cookie Oreo Brownies
- Don’t overbake. You want a fudgy center, not a dry crumbly bar.
- Use parchment paper. Makes lifting and slicing much easier.
- Chill before cutting. Helps layers hold together neatly.
- Double it. Make a 9×13 batch for parties or gifts.
- Mix and match. Try flavored Oreos (mint, peanut butter, or red velvet) for a twist.
Variations to Try
- Salted Caramel Brookies: Drizzle caramel sauce over the Oreo layer before adding brownie batter.
- Peanut Butter Lovers: Add a thin layer of peanut butter on top of the Oreos.
- Mint Madness: Use Mint Oreos and add a drop of peppermint extract to the brownie batter.
- Nutty Brownies: Sprinkle chopped walnuts or pecans on top before baking.
- Holiday Version: Swap regular Oreos for seasonal ones (like red-and-green crème).
Serving Ideas
- Warm with Ice Cream: Microwave a brownie for 10 seconds and serve with a scoop of vanilla ice cream and hot fudge.
- Drizzle Magic: Add melted white chocolate or caramel drizzle for extra flair.
- Party Treats: Cut into bite-sized bars and serve in mini cupcake liners.
- Gift Boxes: Wrap individual squares in wax paper and tie with a ribbon — perfect for edible gifts.
Make-Ahead & Storage
- To Store: Keep in an airtight container at room temperature for up to 4 days, or refrigerate for up to 1 week.
- To Freeze: Wrap bars tightly and freeze for up to 2 months. Thaw overnight before serving.
- To Reheat: Microwave for 10–15 seconds for that fresh-from-the-oven taste.
Why This Recipe Works
Every layer plays its part:
- The cookie dough gives structure and buttery flavor.
- The Oreos add crunch and chocolate cream contrast.
- The brownie layer ties it all together with intense fudginess.
The textures — crispy edges, chewy middle, creamy filling — create a dessert experience that’s over-the-top in the best way.
Frequently Asked Questions
Q: Can I use boxed brownie mix?
Absolutely! Use one box of your favorite mix (usually 18–20 oz) and follow the package directions for ingredients.
Q: Can I make the cookie dough from a mix too?
Yes — refrigerated cookie dough works perfectly for a shortcut version.
Q: How do I make them more fudgy?
Add an extra tablespoon of melted butter or a handful of chocolate chips to the brownie batter.
Q: Can I make them gluten-free?
Yes! Substitute with gluten-free flour and gluten-free Oreos.
Final Thoughts
When you can’t decide between brownies, cookies, or Oreos — why not have all three? These Ultimate Cookie Oreo Brownies are a guaranteed crowd-pleaser, combining your favorite desserts into one sinfully delicious bite.
Every layer melts together into pure chocolate perfection, and each bar tells a story of comfort, indulgence, and everything that’s right in dessert land. Bake once, and you’ll never go back to plain brownies again.
