How to Know if Steamed Clams are Cooked?
Clams are one of the easiest shellfish to understand when they're cooked. During the steaming process, steamers will pop open. Once they open, that's a clear signal that they're cooked and ready to be enjoyed. If they remain closed, that could be a sign that the clam went bad and therefore should be discarded. Better safe than sorry is always my rule when working with clams.