1. How long can the frozen zongzi bought in the supermarket be cooked? It should also be noted that zongzi should never be cooked directly in the pot. You need a pot of cold water until the zongzi is completely thawed, and then put it in the pot to cook, so it will be cooked in 15 minutes. If you cook it directly in the pot, it is ice bumps inside and high temperature outside, so it is easy to be caught.

2. Waterproof steaming: Cooked cold zongzi can be heated directly in boiling water. However, when heating the cooked zongzi, it is advisable that the water has just passed through the zongzi. Generally, it takes 8~ 10 minutes to completely heat the zongzi. Of course, the time required for heating can be increased or shortened according to the size of zongzi and the degree of thawing. If you want to keep the original flavor of zongzi, you'd better boil it in water.

3, microwave heating: cooked jiaozi can also be heated in a microwave oven before eating. First, add a proper amount of water into a special microwave steamer, and then put the jiaozi with plastic bags removed in it, so that the water does not pass through jiaozi, so as to ensure the uniform heating of jiaozi. Select the quick heating key or the high fire key in the microwave oven, and the zongzi can be heated successfully in about 5 minutes. It should be noted that when taking zongzi out of the microwave oven, remember to wear insulating gloves.