The cooking time of oysters varies with the state of oysters and the thickness of shells. If the oyster is shelled, boil it in cold water for 3 to 4 minutes, and after the water boils 1 to 2 minutes. If the oyster is shelled, it needs to be cooked for 5 to 8 minutes. After the water is boiled, it can be cooked for 3 to 5 minutes. It can also be extended according to personal taste.

However, oysters with shells have two shells, so the cooking time will be relatively long, usually taking 8 to 10 minutes. When the shells of oysters are slightly open, it means that they are mature.