3Prepare the cookie layer: Mix flour, baking soda, and salt.
4Set aside the dry ingredients.
5Combine melted butter, brown and granulated sugar, egg, and vanilla.
6Whisk until smooth and fluffy for about 2-3 min.
7Add dry ingredients and chocolate chips.
8Mix until just combined.
9Prepare the brownie layer: Melt butter in a saucepan over medium-low heat.
10Stir every 10 seconds until foamy (6-8 minutes).
11Continue until milk solids turn golden brown and smell nutty.
12Transfer to a heatproof bowl.
13Add cocoa powder, oil, vanilla, and chopped chocolate; mix until smooth.
14In a separate bowl Whisk 3 eggs and light brown sugar for 5-6 minutes until dissolved.
15Add powdered sugar; mix 1-2 minutes until combined.
16Add cooled browned butter mixture; mix until smooth.
17Add flour and chocolate chips; mix until well combined.
18Layer the cookie and brownie batters in the prepared pan.
19Bake for 50-55 minutes or until the edges are golden and center is a little jiggly.
20Let cool completely before cutting into brookies.
Ingredients
0.5 cups unsalted butter, melted and cooled
0.5 cup light brown sugar
0.33 cup 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 cup semi-sweet chocolate chips
0.33 cup 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 panparchment papersaucepanheatproof bowl
Tips
Dissolving sugar in eggs ensures a crackly top.
You can adjust the layering to your preference, either by layering the cookie dough on top of the brownie batter or vice versa, or by creating a marbled effect by swirling the two batters together.