brown butter brookies from @iramsfoodstory

Preheat oven to 180°c. line a 20x20 cm pan with parchment paper. Prepare the cookie layer: mix flour, baking soda, and salt. set aside. combine melted butter, brown and granulated sugar, egg, and vanilla. whisk until smooth and fluffy for about 2-3 min. add dry ingredients and chocolate chips. mix until just combined. Prepare the brownie layer: melt butter in a saucepan over medium-low heat. stir every 10 seconds until foamy (6-8 minutes). continue until milk solids turn golden brown and smell nutty. transfer to a heatproof bowl. add cocoa powder, oil, vanilla, and chopped chocolate; mix until smooth. In a separate bowl, whisk 3 eggs and light brown sugar for 5-6 minutes until dissolved. add powdered sugar; mix 1-2 minutes until combined. add cooled browned butter mixture; mix until smooth. add flour and chocolate chips; mix until well combined. Layer the cookie and brownie batters in the prepared pan. Bake for 50-55 minutes or until the edges are golden and center is a little fudgy. Let cool completely before cutting into brookies.