Step 1

Preheat oven to 350°. Line a 9x13” pan with foil and spray with cooking spray.

Step 2

Make the cookies: Cream together butter and sugars in the bowl of a stand mixer or in a large bowl using a hand mixer. Mix in egg, extract, baking soda, and salt. Stir in flour, then stir in chocolate chips.

Step 3

Press the cookie dough into the bottom of the prepared pan. Top evenly with Oreos.

Step 4

Make the brownies: Place the baking chocolate and butter in a large, microwave safe bowl. Heat on HIGH power for 2-3 minutes, stirring every 30 seconds, until chocolate is smooth. Stir in sugar. Add eggs, vanilla, and cocoa and stir well. Add flour and stir carefully.

Step 5

Spread brownie batter over the top of the Oreos in prepared pan.

Step 6

Bake for 30-40 minutes until the top looks done and the center is no longer jiggly.