They should be cooked for at least fifteen minutes.

Quick-frozen food requires that its freshness be maintained from raw material to product, so it is important to keep the temperature of the working environment stable during the production and processing of the dumplings, which is usually around 10℃.

Cooking dumplings after the water boils, put 15 to 20 ml of cooking oil, and then add pre-cut green onion, cook for about 30 seconds; when the water boils again, put the frozen dumplings, with the back of the spoon, along the bottom of the pot, and slowly push in a clockwise direction to prevent the dumplings from sticking to the bottom of the pot; after the pot opens, add water, continue to cook, so repeat 3 times, and so on, and so on, and so on, and so forth, and so forth, and so forth, and so forth, and so forth, and so forth, and so forth, and so forth, and so forth, and so forth, and so forth.

Expanded Information:

Tips for Frozen Dumpling:

1, boil the dumplings in more water, add the right amount of salt to increase the cooking resistance of the dumpling skin.

2. Boil the water before putting the dumplings in the pot, and stir well from time to time to prevent the dumplings from sticking to the pot.3

3. Don't let the water boil too much, or else the dumplings will be easy to break, so you can add a little bit of cool water after the water boils, and then add cool water after the water boils and so on, and repeat this three times then you can do it.

4, cooking frozen dumplings to observe the shape of the dumplings, dumplings in the pot will slowly become soft, if the dumplings floating in the water, dumpling skin uneven, it means that the dumplings have been cooked.

5, quick-frozen dumplings frozen too long, dumpling skin water will evaporate, dumplings are not easy to cook, there will be a little bit of raw, should not be cooked with high heat, to use a small fire slowly cook through the dumplings.