Preheat the oven to 375°F
Thaw crab legs if frozen
Rinse crab legs and pat dry
Place crab legs on a baking sheet
Add a little water to the baking sheet
Cover the crab legs tightly with foil
Bake for 15 to 20 minutes
Bake frozen crab legs for 25 to 30 minutes
Remove from oven carefully
Serve with melted butter and lemon if desired