Cream brown sugar and shortening and beat. Then add molasses and egg, beating continuously. Sift dry ingredients together and blend into hot water. Then beat this mixture into creamed mixture. As the last step, add the sourdough starter slowly, mixing carefully to maintain a bubbly batter. Bake in pan at 190ºC for about 30 minutes or until done. Serve with ice cream or whipped cream while still hot if possible.