Place the dumplings in a large pot and add cold water to 3 '' above the level of the dumplings. Cover and bring to a boil over high heat, then cook over medium low heat for about four hours. Leave the pot covered for another hour after turning off the heat. Cut the strings and discard the bamboo leaves before serving.
6. 粽子全部包好後置於大鍋內，入冷水（浸過粽子三寸）用大火煮滾後改以中小火續煮四小時，熄火並燜一小時，即可取出食用。