1Instructions
- 1
Preheat your oven to 180°C (350°F). Line a 20cm (8-inch) square baking pan with parchment paper.
- 2
In a medium bowl, melt the unsalted butter. Add the brown sugar and whisk until well combined and smooth.
- 3
Beat in the egg and vanilla extract until the mixture is glossy and fully incorporated.
- 4
In a separate bowl, sift together the all-purpose flour, unsweetened cocoa powder, baking powder, and salt.
- 5
Gradually fold the dry ingredients into the wet mixture until just combined. Do not overmix.
- 6
Stir in the chopped walnuts and dark chocolate chips until evenly distributed.
- 7
Pour the batter into the prepared baking pan and spread it evenly with a spatula.
- 8
Bake for 18-22 minutes, or until a toothpick inserted into the center comes out with a few moist crumbs.
- 9
