Combine flour, cocoa (2 Tablespoons) and sugar in your microwave safe pudding bowl.
Place chocolate and butter in a small, microwave safe bowl and melt for 30 seconds on high. Stir - return to microwave for longer if not fully melted.
Stir melted chocolate mixture and milk into dry ingredients. Mix well.
Mix brown sugar with the extra cocoa (2 Tablespoons). Sprinkle over the pudding mixture.
Pour boiling water over pudding.
Cook for 6 minutes on high.
Stand for 2-3 minutes before serving.