The recommended boiling time for self-wrapped Zongzi is typically around 1 to 2 hours. This duration ensures that the rice and other fillings are thoroughly cooked and the Zongzi is soft and well-cooked. The exact time may vary slightly depending on the size of the Zongzi and the strength of the stove used for boiling.

The reason for this boiling time is that Zongzi is made with sticky rice, which requires a longer cooking process to become fully tender. The rice needs to absorb the flavors of the water and any additional seasonings or fillings. Additionally, the filling, which can include meats, fruits, or nuts, also needs time to cook through. A shorter boiling time may result in undercooked rice or a filling that is not fully cooked, leading to a less enjoyable texture and flavor.

Research suggests that the cooking time for Zongzi can vary, but a general guideline is to boil it for at least 1 hour. For example, a study published in the Journal of Food Science and Technology found that the cooking time for sticky rice dumplings, which are similar to Zongzi, ranged from 1.5 to 2 hours. This study also noted that the cooking time was influenced by the size of the dumplings, with larger dumplings requiring more time to cook thoroughly.

In conclusion, boiling self-wrapped Zongzi for 1 to 2 hours is the recommended cooking time to ensure that the rice and filling are fully cooked and the Zongzi is soft and flavorful. This duration allows the rice to absorb the flavors and the filling to cook through, resulting in a delicious and satisfying treat.