Brookies Two Ways: Fudgy Brownie Meets Chewy Cookie Step-by-step instructions

Before you start

Before starting, measure all ingredients and line an 8x8-inch baking pan with parchment paper. Bring the eggs to room temperature if possible, as they incorporate more smoothly into the brownie batter.

Have the butter for the brownie layer measured and ready, and melt the butter for the cookie layer so it can cool slightly. Preheat the oven to 350°F (175°C) when you begin the assembly. This recipe moves quickly, so having everything prepared makes the process seamless.

Instructions

Brown the Butter and Make the Batters

1. 1Brown the Butter for the Brownie Layer
   In a small saucepan over medium heat, melt the 1/2 cup unsalted butter. Continue cooking, swirling the pan occasionally, until the butter foams and turns a deep amber color with a nutty aroma, about 3 to 4 minutes. Remove from heat immediately. Pour the browned butter into a large mixing bowl and let it cool slightly while preparing other ingredients.
   Look for The butter should smell nutty and have browned milk solids at the bottom of the pan.
   Tip Watch carefully: the butter can go from browned to burnt quickly. The color should be golden brown, not dark.
2. 2Make the Brownie Batter
   Whisk the Dutch cocoa powder and granulated sugar into the warm browned butter until smooth and glossy. Add the eggs one at a time, whisking well after each addition. Stir in the all-purpose flour and kosher salt just until combined—do not overmix. The batter should be thick and fudgy.
   Look for The batter should be thick, glossy, and smooth with no streaks of flour.
   Safe temperature 160°F (71°C) internal temperature (egg dishes)
   Tip Use a whisk for the eggs to incorporate air, which helps the brownie layer rise slightly.
3. 3Prepare the Cookie Dough
   In a separate bowl, mix the brown sugar and melted butter until well combined. Add the all-purpose flour, baking soda, and chocolate chips. Stir with a spatula until a soft dough forms. The dough will be slightly crumbly but should hold together when pressed.
   Look for The dough should be cohesive and slightly sticky, with chocolate chips evenly distributed.
   Tip If the dough is too crumbly, press it together with your hands; do not add liquid.

The browned butter should be amber and smell nutty. The brownie batter should be glossy and thick, and the cookie dough should hold together when pressed. At this point, the oven should be preheating. The textures of the two mixtures are different: the brownie batter is pourable, while the cookie dough is more like soft play dough. This contrast is expected and will create the layered effect.

Assemble and Bake

4. 4Assemble the Brookie
   Preheat the oven to 350°F (175°C). Line an 8x8-inch baking pan with parchment paper, leaving overhang on two sides. Spread the brownie batter evenly in the bottom of the pan. Drop spoonfuls of the cookie dough over the brownie batter, covering the surface as evenly as possible. The dough will spread during baking.
   Look for The pan should be filled with a smooth brownie layer and scattered cookie dough dollops.
   Tip Use a spatula to gently press the cookie dough slightly, but leave some gaps so the brownie can peek through.
5. 5Bake Until Edges Are Crisp
   Bake the brookies in the preheated oven for 25 minutes, or until the edges are crisp and the top is golden brown. A toothpick inserted into the center should come out with a few moist crumbs, not wet batter. The center will look slightly underdone but will set as it cools.
   Look for The edges should be deeply golden and pulling away from the pan; the center should be set but still soft.
   Safe temperature 160°F (71°C) internal temperature (egg dishes)
   Tip If the top browns too quickly, tent loosely with foil for the last 5 minutes.

The assembled brookies should have a smooth brownie layer with dollops of cookie dough on top. During baking, the kitchen will smell of chocolate and toasted brown sugar.

The edges will become crisp and golden, while the center remains slightly soft. A toothpick inserted into the center should come out with a few moist crumbs, signaling that the eggs are cooked through. The top may crack, which is normal.

Cool, Salt, and Cut

6. 6Cool and Finish with Sea Salt
   Remove the pan from the oven and immediately sprinkle the flaky sea salt over the hot brookies. Let the brookies cool in the pan on a wire rack for at least 10 minutes. Use the parchment overhang to lift the entire block onto a cutting board. Cut into 16 squares and serve warm or at room temperature.
   Look for The sea salt should glisten on the surface, and the brookies should have a shiny, crackly top.
   Tip For clean cuts, use a sharp knife and wipe it between cuts.

After removing from the oven, the brookies will be hot and fragrant. The flaky sea salt should be sprinkled immediately so it adheres. After cooling for 10 minutes, the brookies should be firm enough to lift from the pan using the parchment. They should cut into clean squares, revealing the distinct brownie and cookie layers. The edges will be crisp, and the centers will be dense and fudgy.

Common mistakes

A common mistake is overmixing the brownie batter, which can make it tough. Mix until the flour is just incorporated. Another issue is overbaking, which dries out the brookies; the center should be slightly underdone when you remove them from the oven.

If the cookie dough is too crumbly, press it together with your hands rather than adding liquid. Also, ensure the browned butter is not burned—it should be amber and nutty, not dark and bitter. Finally, let the brookies cool before cutting to avoid crumbling.

How to tell it’s done

The brookies are done when the edges are crisp and have pulled away from the pan slightly. The top should be golden brown and may have a few cracks. A toothpick inserted into the center should come out with a few moist crumbs, not wet batter.

The center will look slightly soft but will set as it cools. The internal temperature of the eggs should reach 160°F (71°C) to ensure they are fully cooked. Let the brookies cool for at least 10 minutes before cutting for the best texture.

• Egg dishes: 160°F (71°C) in the thickest part