These slutty brownies are one of my favorite over-the-top desserts to bake when I want something truly indulgent. I love how three classic treats come together in one pan: a chewy chocolate chip cookie base, a full Oreo layer, and a rich, fudgy brownie topping. The result is a thick, satisfying dessert with clear layers and deep chocolate flavor in every bite.
Why You’ll Love This Recipe
I love this recipe because it is completely homemade and delivers bakery-style brownies without being complicated. I get cookies, Oreos, and brownies all at once, which means no compromises. The layers bake together beautifully, the texture stays soft and fudgy, and the brownies slice cleanly once cooled. I also like how reliable this recipe is for parties, potlucks, or anytime I want a guaranteed crowd-pleaser.
Ingredients
(Tip: You’ll find the full list of Ingredients and measurements in the recipe card below.)
Chocolate chip cookie layer
3/4 cup unsalted butter, softened
1/2 cup brown sugar
1/2 cup white sugar
1 large egg
1 large egg yolk
1 teaspoon vanilla extract
1 1/2 cups all-purpose flour
1/4 teaspoon salt
2/3 cup chocolate chips
Oreo layer
28 Oreo cookies
Brownie layer
1/2 cup unsalted butter
6 ounces dark or semi-sweet chocolate, chopped
1 cup granulated sugar
2 large eggs
1/2 cup all-purpose flour
1/4 cup cocoa powder
1/2 teaspoon salt
Directions
I begin by preheating the oven to 350°F (180°C) and preparing a 9×13-inch baking pan with parchment paper, leaving an overhang so I can lift the brownies out later.
For the cookie layer, I beat the softened butter with the brown sugar and white sugar until combined. I mix in the egg, egg yolk, and vanilla extract, then slowly add the flour and salt. Once the dough comes together, I stir in the chocolate chips. I spread the cookie dough evenly into the prepared pan.
Next, I arrange the Oreo cookies on top of the cookie dough, pressing them down gently so they sit firmly and cover the surface as evenly as possible.
For the brownie layer, I melt the butter and chopped chocolate together gently, stirring until smooth. I let the mixture cool slightly before whisking in the sugar and eggs. I then add the flour, cocoa powder, and salt, mixing just until combined. I spoon the brownie batter evenly over the Oreo layer and spread it into a smooth top layer.
I bake the brownies until the top is set and a toothpick inserted into the center comes out with a few moist crumbs. Once baked, I allow the brownies to cool completely before slicing so the layers stay neat and defined.
Servings And Timing
This recipe makes 18 slices.
Preparation takes about 30 minutes, baking takes 40–50 minutes, and total time is around 1 hour and 20 minutes, not including cooling. I always allow at least 4 hours of cooling time before slicing.
Variations
I sometimes use flavored Oreos, such as peanut butter or mint, to change the flavor profile. I also enjoy adding chopped nuts to the brownie layer for extra texture. For a deeper chocolate taste, I occasionally swap semi-sweet chocolate chips into the cookie layer.
Storage/Reheating
I store these brownies in an airtight container at room temperature for up to 4 days. When I want to enjoy them warm, I reheat individual slices briefly in the microwave until just softened.
FAQs
Can I make these brownies ahead of time?
Yes, I often make them a day in advance since they slice better after resting overnight.
Can I freeze these brownies?
I freeze individual slices wrapped tightly, and they keep well for up to 2 months.
How do I know when the brownies are done baking?
I look for a set top and a toothpick that comes out with a few moist crumbs rather than wet batter.
Can I halve the recipe?
Yes, I halve the recipe and bake it in an 8×8-inch pan with a slightly shorter baking time.
Why do the brownies need to cool completely?
I let them cool fully so the layers firm up, which makes slicing clean and easy.
Conclusion
These slutty brownies are a rich, layered dessert that I love making when I want something impressive and comforting at the same time. With their chewy cookie base, Oreo center, and fudgy brownie topping, they bring together everything I enjoy about classic baked treats in one unforgettable pan.
Slutty Brownies are the ultimate indulgent dessert featuring three layers: a chewy chocolate chip cookie base, a whole Oreo cookie layer, and a rich, fudgy brownie topping—all baked together into one irresistible treat.
Total Time:1 hour 20 minutes
Yield:18 slices
Ingredients
Chocolate Chip Cookie Layer:
3/4 cup unsalted butter, softened
1/2 cup brown sugar
1/2 cup white sugar
1 large egg
1 large egg yolk
1 teaspoon vanilla extract
1 1/2 cups all-purpose flour
1/4 teaspoon salt
2/3 cup chocolate chips
Oreo Layer:
28 Oreo cookies
Brownie Layer:
1/2 cup unsalted butter
6 ounces dark or semi-sweet chocolate, chopped
1 cup granulated sugar
2 large eggs
1/2 cup all-purpose flour
1/4 cup cocoa powder
1/2 teaspoon salt
Instructions
Preheat the oven to 350°F (180°C) and line a 9×13-inch baking pan with parchment paper, leaving an overhang for easy removal.
Make the Cookie Layer: Beat the softened butter with brown and white sugar until combined. Mix in the egg, egg yolk, and vanilla. Gradually add flour and salt, then stir in chocolate chips. Press the dough evenly into the bottom of the prepared pan.
Add the Oreo Layer: Place Oreo cookies in a single layer over the cookie dough, gently pressing them down.
Make the Brownie Layer: Melt butter and chopped chocolate together until smooth. Let cool slightly, then whisk in sugar and eggs. Stir in flour, cocoa powder, and salt until just combined.
Spoon brownie batter over the Oreo layer and smooth the top.
Bake for 40–50 minutes, or until the top is set and a toothpick comes out with a few moist crumbs.
Allow the brownies to cool completely in the pan (at least 4 hours) before lifting out and slicing.
Notes
Use flavored Oreos (like mint or peanut butter) for variation.
Chopped nuts can be added to the brownie layer for extra crunch.
Cool completely before slicing for defined layers.
These brownies are best made a day ahead for clean slicing.
