Ingredients
- Brownie Layer:
- 1 cup unsalted butter, melted
- 2 cups granulated sugar
- 4 large eggs, room temperature
- 2 teaspoons vanilla extract
- 4 tablespoons vegetable oil
- 1½ cups unsweetened cocoa powder
- 1 cup all-purpose flour
- 4 teaspoons cornstarch
- 1/2 teaspoon baking soda
- 1 teaspoon salt
- 2 cups semi-sweet chocolate chips
- Cookie Dough Layer:
- 2½ cups all-purpose flour
- 1/2 teaspoon baking soda
- 1/2 teaspoon kosher salt
- 1 cup browned butter or room temperature unsalted butter
- 3/4 cup brown sugar
- 3/4 cup granulated sugar
- 2 large eggs, room temperature
- 2 teaspoons vanilla extract
- 2 cups semi-sweet chocolate chips
- Optional: Maldon salt flakes for garnish
Instructions
- Preheat oven to 325°F. Line a 13×18-inch sheet pan (or 10×15-inch for thicker brookies) with parchment paper, leaving overhang.
- Make the Brownie Layer: In a large bowl, beat melted butter and sugar until smooth. Whisk in eggs and vanilla. Stir in vegetable oil and cocoa powder until combined. Add flour, cornstarch, baking soda, and salt. Fold in chocolate chips. Spread batter evenly into the prepared pan.
- Make the Cookie Dough Layer: In a medium bowl, sift together flour, baking soda, and salt. In another large bowl, mix browned butter with brown sugar and granulated sugar until well combined. Beat in eggs one at a time, then add vanilla. Gradually mix in the dry ingredients. Fold in chocolate chips.
- Crumble the cookie dough evenly over the brownie batter, covering the surface.
- Bake for 25–30 minutes if using a 13×18-inch pan, or 30–35 minutes for a 10×15-inch pan, until the top is golden and a toothpick inserted in the center comes out with moist crumbs.
- Sprinkle with Maldon salt if desired. Let cool completely in the pan before slicing into bars.
Notes
- Brown butter adds a rich, nutty flavor to the cookie dough but regular butter works too.
- Don’t overbake to keep the center fudgy—brookies will continue to set as they cool.
- These freeze well; store in an airtight container for up to 2 months.
- Prep Time: 15 minutes
- Cook Time: 28 minutes
- Category: Dessert
- Method: Baking
- Cuisine: American
- Diet: Vegetarian
Nutrition
- Serving Size: 1 bar
- Calories: 410
- Sugar: 32g
- Sodium: 150mg
- Fat: 22g
- Saturated Fat: 13g
- Unsaturated Fat: 8g
- Trans Fat: 0g
- Carbohydrates: 50g
- Fiber: 3g
- Protein: 4g
- Cholesterol: 65mg
