Why You’ll Love This Ultimate Oreo Brookie

If you love cookies, brownies, and Oreos, this is the recipe for you. This Oreo Brookie has it all—a soft and chewy cookie base, a layer of whole Oreos, and a rich, fudgy brownie layer packed with white chocolate chips.

It’s crispy on the edges, gooey in the centre, and loaded with chocolate. Plus, the hidden layer of Oreos adds the perfect crunch.

This is the ultimate dessert for sharing, but I won’t judge if you keep it all to yourself.

The Secret to the Best Oreo Brookie

Chilling the cookie base before adding the brownie layer is the secret to getting your brookie perfectly layered. This prevents the layers from mixing and gives you those distinct textures in every bite.

Whipping the eggs for the brownie batter creates that crackly, glossy top and makes the brownies super fudgy.

Ingredients for The Ultimate Oreo Brookie

For the Cookie Base:

• 200g unsalted butter, softened (7oz)
• 250g light brown sugar (1¼ cups packed light brown sugar)
• 1 large egg, room temperature
• 1 tsp vanilla extract
• 275g plain flour (2¼ cups all-purpose flour)
• 1 tsp baking powder
• 150g chocolate chips (¾ cup chocolate chips)

For the Oreo Layer:

• 16 whole Oreos

For the Brownie Layer:

• 170g unsalted butter, melted (6oz)
• 250g caster sugar (1¼ cups granulated sugar)
• 2 large eggs
• 125g dark chocolate (at least 50% cocoa), melted & cooled slightly (4.5oz)
• 100g plain flour (¾ cup all-purpose flour)
• 30g cocoa powder (¼ cup cocoa powder)
• 1 tsp salt
• 100g white chocolate chips (¾ cup white chocolate chips)

For the Topping:

• 10 Oreos, roughly broken
• 50g white chocolate chips (⅓ cup white chocolate chips)
• Caramel sauce (optional, for drizzling)

How to Make the Ultimate Oreo Brookie

Step 1: Make the Cookie Base

Preheat your oven to 190C (170C fan) / 375F and line an 8×8-inch baking tin with baking paper.

In a large mixing bowl, cream the softened butter and light brown sugar together using a wooden spoon or rubber spatula until smooth.

Mix in the egg and vanilla extract until just combined.

Fold in the plain flour and baking powder until just a few streaks of flour remain. Then, fold in the chocolate chips until evenly distributed.

Press the dough into the lined baking tray and spread it out evenly with the back of a spoon or your hands.

Place the cookie dough layer in the freezer while you prepare the brownie batter.

Step 2: Make the Brownie Layer

In a large mixing bowl, whisk together the melted butter and caster sugar with an electric whisk or stand mixer for about 2 minutes, until combined.

Add the eggs and whisk on high speed until the mixture thickens and forms soft peaks. This can take 5-10 minutes, depending on your mixer.

Whisk in the cooled, melted dark chocolate until just combined.

Sift in the plain flour, cocoa powder, and salt. Gently fold these in with a spatula until only a few streaks of flour remain.

Fold in the white chocolate chips, making sure they’re evenly distributed.

Step 3: Assemble the Brookie

Remove the cookie base from the freezer and arrange the whole Oreos on top in a 4×4 grid.

Gently scoop the brownie batter over the Oreos and smooth it out evenly with a spatula.

Sprinkle the broken Oreos and remaining white chocolate chips evenly over the top.

Step 4: Bake the Brookie

Bake at 190C (170C fan) / 375F for 35-45 minutes, or until the edges are set and the middle has a slight wobble.

Let the brookie cool completely in the tin, to allow them to set properly, then refrigerate overnight for the best fudgy texture.

Slice into 16 squares and drizzle with caramel sauce if you like. Enjoy!

Tips for the Best Oreo Brookie

1. Chill the Cookie Base: Freezing the cookie dough for 10-15 minutes before adding the brownie layer helps the layer to cook more evenly.
2. Whip the Eggs for the Brownies: This creates that signature crackly top and makes the brownies extra fudgy.
3. Use a Dark Chocolate yo like: A chocolate with at least 50% cocoa solids gives the best rich flavour.
4. Let It Cool Completely: Refrigerating the brookie overnight gives it the best dense, fudgy texture and makes it easier to cut.
5. Don’t Overbake: The brookie may have a slight wobble in the centre when you take it out of the oven and it should be cracked around the edges. It will firm up as it cools.

Why You’ll Love This Ultimate Oreo Brookie

This Oreo Brookie is the perfect dessert mashup. The soft, chewy chocolate chip cookie base, crunchy Oreos, and gooey brownie layer create an irresistible texture combo.

Every bite is filled with rich chocolate, buttery cookie dough, and crunchy Oreos. It’s the ultimate crowd-pleaser and perfect for parties, bake sales, or just enjoyihg at home.

Watch My Step-by-Step Video

Want to see exactly how I make these Oreo Brookies? Watch my full step-by-step video on my YouTube channel.

For more baking inspiration, follow me on Instagram @fitwafflekitchen and TikTok @fitwaffle!

Other Recipes You’ll Love

If you love chocolatey, layered desserts, try these recipes from Fitwaffle Kitchen:

1. Cookie Dough Brownies – Fudgy brownies loaded with chunks of chocolate chip cookie dough.
2. Super Fudgy Triple Chocolate Brownies – Rich, decadent brownies with dark, milk, and white chocolate.

Both are super chocolatey, easy to make, and absolutely delicious!