Steaming crabs usually takes about 15 minutes to steam. but also need to be differentiated according to the size of the crab and the weather, the day cold if you need to wait for the water to boil before timing:

General more than 4 two crabs can be steamed in about 15 minutes to steam, the day cold water is difficult to open the water needs to wait for the water to boil and continue to steam for 12 minutes can be steamed; 3-4 two or so of the crab steamed in about 12 minutes can be steamed, the day cold water is difficult to open the water needs to wait for the water to boil and continue to steam! It will take about 10 minutes for the crabs under 3 taels to be steamed, and 8 minutes for the crabs to be steamed after the water boils in cold weather.

Cold water or hot water:

Steaming crabs generally requires cold water. However, if the crab is frozen, it can be steamed in hot water. Because of the fresh crab meat is delicious and easy to cook, if the hot water in the pot is easy to destroy the crab meat, easy to lose too much water and loss of nutrients and taste, so the steamed crab must be cold water in the pot steam is appropriate. If you buy frozen crabs frozen crabs, in the absence of thawing, you can also recommend hot water under the pot steam, so that the crab can naturally steam faster through, but in the steaming time needs to be in the base time and then extend the 5 minutes or so.