how long to steam frozen snow crab legs
4. Cover the pot and steam the crab legs. Once the pot is boiling, put the steamer basket into the pot and replace the lid. Monitor the pot for the next few minutes until steam begins to develop. Thawed crab legs should steam for 5â6 minutes, and frozen legs will take about 10â12 minutes. Check the inside of a claw with a thermometer. It's done when the crab leg reaches 155 degrees.