Brownie made in the microwave
Preheat the oven to 170°C (338°F).
Melt dark chocolate and butter together in a double boiler.
Add eggs and sugar into a bowl and mix.
Add the melted chocolate and butter to the egg mixture and combine.
Sift in the flour and cocoa powder, and mix evenly.
Add nuts and stir into the batter.
Pour the batter into a pan lined with parchment paper.
Bake at 170°C (338°F) for 20–25 minutes.
Let cool completely, then cut into serving-sized pieces.