Frozen king crab legs can be prepared by heating the crab legs with steam, boiling them in a pot of water, grilling them on both sides over open flame or oven baking. King crab legs are usually purchased pre-cooked, and they only require reheating to make them ready to eat.
Steaming is a common method for preparing king crab legs, and this method involves placing 2 cups of water in a large pot along with a small amount of salt and bringing it to a boil. Place the crab legs into a steamer insert or on a rack, and cover the pot with a lid. The steam heats the crab legs in about six minutes. Crab legs can also be steamed using alternative liquids, such as beer, which is how they are cooked in a recipe developed by chef Emeril Lagasse. In this simple recipe, garlic and lemons are added to the beer, and the crab legs are thoroughly steamed.
King crab legs can be cooked on the grill by brushing both sides of each leg with olive oil, and cooking the legs on a grill heated to 300 degrees Fahrenheit. To bake crab legs, place them into a shallow baking dish and fill the dish with 1/8-inch of hot water. Cover the baking dish with aluminum foil and bake for the recommended time.