1. Make the Brownie Batter

• In a medium bowl, whisk melted butter and sugar until combined.

• Add eggs and vanilla, and whisk until smooth.

• Sift in cocoa powder, flour, and salt. Stir until just combined.

• Do not overmix—just until no dry streaks remain.

2. Prepare the Cookie Dough

• In another bowl, cream softened butter, brown sugar, and white sugar until light and fluffy.

• Add in the egg and vanilla extract. Beat until smooth.

• Mix in flour, baking soda, and salt.

• Fold in chocolate chips.

💡 Pro Tip: Chill cookie dough in the fridge for 10 minutes while you prepare the pan.

3. Layer the Batters

• Line a square baking pan with parchment paper.

• Spread the brownie batter evenly at the bottom.

• Dollop spoonfuls of cookie dough over the brownie layer.

• Gently press cookie dough flat with a spatula or fingers.

4. Bake

• Bake in a preheated oven at 350°F (175°C) for 30–35 minutes.

• Check doneness with a toothpick—it should come out with moist crumbs, not raw batter.

• Cool completely on a wire rack before slicing.