Preheat oven to 350 degrees, and line an 8x8 baking dish with parchment paper so the 2 ends hang off the sides.
To make the brownie batter, melt chocolate chips and butter in the microwave in 30 second increments until smooth when stirred or use a double boiler.
2/3 cup semisweet chocolate chips, 1/4 cup butter
In a large bowl, beat together egg, granulated sugar, and vanilla extract. Drizzle in the melted chocolate while continuously whisking.
1 egg, 1 tsp vanilla extract, 1/3 cup granulated sugar
Add flour, cocoa powder, and sea salt, and stir until just combined.
1/4 cup gluten free all-purpose flour, 2 tbsp cocoa powder, 1/8 tsp sea salt
Fold in chocolate chips and set aside.
2 tbsp chocolate chips
Make the cookie dough: In a large mixing bowl, add melted butter, brown sugar, and granulated sugar. Whisk together until smooth.
1/4 cup butter, 1/4 cup brown sugar, 2 tbsp granulated sugar
Add egg and vanilla extract, and whisk until creamy.
1 egg, 1 tsp vanilla extract
Add flour, baking soda, and sea salt, and stir until just combined and a soft dough is formed.
3/4 cup gluten free all-purpose flour, 1 tsp baking soda, 1/8 tsp sea salt
Fold in chopped Oreos.
4 Oreos cookies
Scoop 2 tablespoon of cookie dough into the prepared baking spacing them out evenly. Scoop the brownie batter and place in the empty spots around the the cookie dough. Use a spatula to press down lightly to flatten everything out evenly.
Top with roughly chopped Oreo cookies and press down lightly. Cover with foil.
6 Oreo cookies
Bake for 15 minutes, the remove the foil. Bake for another 12-17 minutes until a toothpick inserted into the brownie batter comes out covered in a few moist crumbs.
Let cool for 10 minutes, then remove from pan and transfer to a cooling rack to cool completely. Slice and enjoy!