Stone crab claws can be roasted -- from frozen or thawed -- in the oven. This reheating method leads to firm, succulent meat that is less watery than either steaming, microwaving or boiling. 1  Roast the crab claws on a baking sheet in a 350 degree-Fahrenheit oven until they are warmed through. Roast the crab claws on a baking sheet in a 350 degree-Fahrenheit oven until they are warmed through. 2  It will take roughly 15 minutes for 2 pounds of large, thawed crab claws to fully reheat.