1Preheat oven to 350°F. Line an 8x8 inch pan with parchment paper.
2Prepare the cookie layer: Mix flour, baking soda, and salt. Set aside.
3Combine melted butter, brown and granulated sugar, egg, and vanilla. Whisk until smooth and fluffy for about 2-3 minutes.
4Add dry ingredients and chocolate chips. Mix until just combined.
5Prepare the brownie layer: The browned butter mixture: Melt butter in a saucepan over medium-low heat. Stir every 10 seconds until foamy (6-8 minutes).
6Continue until milk solids turn golden brown and smell nutty. Transfer to a heatproof bowl.
7Add cocoa powder, oil, vanilla, and chopped chocolate; mix until smooth.
8In a separate bowl whisk 3 eggs and light brown sugar for 5-6 minutes until dissolved.
9Add powdered sugar; mix 1-2 minutes until combined.
10Add cooled browned butter mixture; mix until smooth.
11Add flour and chocolate chips; mix until well combined.
12Layer the cookie and brownie batters in the prepared pan.
13Bake for 50-55 minutes or until the edges are golden and the center is a little jiggly. They will set once they are completely cooled.
14Let cool completely before cutting into brookies.
Ingredients
0.5 cups unsalted butter, melted and cooled
0.5 cups light brown sugar
0.33 cups granulated sugar
1 large egg, room temp
1 tbsp vanilla extract
1.25 cups all-purpose flour, spooned and leveled
0.5 tsp baking soda
0.5 tsp flaky sea salt
1.5 cups semi-sweet chocolate chips
1 cup unsalted butter
0.5 cup Dutch-processed cocoa powder
1 tsp vanilla
0.5 cup light brown sugar, spooned and leveled
1.75 cup powdered sugar
0.75 cups semi-sweet chocolate chips
0.33 cups semi-sweet chocolate, chopped
3 eggs, room temp
0.5 cup all-purpose flour
1 pinch salt
3 tbsp olive oil
Equipment
8*8 inch baking panparchment paperwhiskspatulasaucepan