01 - 
                Preheat oven to 175°C. Grease a 23x13 cm loaf pan with nonstick spray or butter and lightly dust with flour.
              
              
              
                02 - 
                In a large mixing bowl, blend the brownie mix, eggs, water, and vegetable oil until smooth and thick.
              
              
              
                03 - 
                Gently fold 120 ml hot fudge sauce into the batter, taking care not to overmix to preserve swirls.
              
              
              
                04 - 
                If desired, stir in semi-sweet chocolate chips for additional richness.
              
              
              
                05 - 
                Pour the batter into the prepared loaf pan and level the surface.
              
              
              
                06 - 
                Bake for 50 to 60 minutes. Check at 45 minutes; if the surface browns excessively, tent loosely with foil. The loaf is ready when a toothpick inserted in the centre yields a few moist crumbs.
              
              
              
                07 - 
                Let cool in the pan for 10 to 15 minutes, then transfer to a wire rack to cool completely. Warm additional hot fudge and drizzle over before serving.