Ingredients:
- 1 cup (227g) unsalted butter, cut into cubes
- 1 cup (120g) all-purpose flour
- ½ cup (45g) unsweetened cocoa powder
- ¼ teaspoon salt
- ¼ teaspoon baking powder
- 1 cup (200g) granulated sugar
- ½ cup (100g) packed light brown sugar
- 3 large eggs
- 2 teaspoons vanilla extract
- ½ cup (85g) semi-sweet chocolate chunks (optional)
Instructions:
- Preheat oven to 350°F (175°C). Line an 8x8 inch baking pan with parchment paper, leaving an overhang on the sides.
- Melt butter in a saucepan over medium heat. Continue cooking, swirling occasionally, until it turns golden brown and smells nutty (about 5-8 minutes). Watch carefully to prevent burning!
- Pour the browned butter into a heatproof bowl and let it cool slightly (about 5 minutes).
- Whisk together flour, cocoa powder, salt, and baking powder in a separate bowl.
- Whisk granulated sugar and brown sugar into the cooled brown butter.
- Whisk in the eggs one at a time, then stir in the vanilla extract.
- Gradually add the dry ingredients to the wet ingredients, mixing until just combined. Do not overmix!
- Gently fold in the chocolate chunks (if using).
- Pour the batter into the prepared baking pan and spread evenly.
- Bake for 30-35 minutes, or until a toothpick inserted into the center comes out with moist crumbs attached.
- Let cool completely in the pan before lifting out using the parchment paper overhang. Cut into 16 squares and serve.