Ingredients
Equipment
Method
Method
- Preheat the oven to 350°F (175°C) and line a 9x13-inch baking pan with parchment paper.
- Whisk together the melted butter, granulated sugar, and brown sugar in a large bowl until smooth and glossy.
- Whisk in the eggs one at a time, followed by the vanilla extract.
- Sift together the flour, cocoa powder, baking powder, and salt in a separate bowl.
- Fold the dry ingredients into the wet mixture until just combined.
- Gently fold in 1/2 cup of chocolate chips and the walnuts if using.
- Spread the batter into the prepared pan and sprinkle the remaining 1/2 cup of chocolate chips on top.
- Bake for 25-30 minutes until a toothpick inserted in the center comes out with a few moist crumbs.
- Cool completely on a wire rack before lifting out with the parchment paper and cutting into squares.
Notes
Use melted butter for a fudgier texture. Do not overmix the batter after adding flour to prevent tough bars. Store in an airtight container for up to 1 week at room temperature.