Supermarket dumplings are generally cooked, cold water in the pot, the water boiled with medium heat and continue to cook 15 minutes to 20 minutes on the good. 2007-6-15 Supermarket bought frozen dumplings to cook how long ah 32 2008-6-23 Supermarket bought back. Frozen food are already done, only frozen, just heat it can be eaten I just bought the dumplings from the supermarket, how long do I need to cook? (I just bought the dumplings from the supermarket, how long do I need to cook them?) 2007-6-18 19:29 Satisfactory Answer 20 minutes is enough, after cooking put the pot to smother for a while, you can enjoy it Oh. I'm still cooking it.