Formed, uncooked crab cakes can be frozen for up to 1 month. To freeze, leave the formed crab cakes on the baking tray and put in the freezer until firm; about an hour. Wrap each one individually in plastic wrap, put them all in an air-tight freezer bag or container, and put them back into the freezer. (Prefreezing helps them keep their shape while you wrap them.) Defrost in the refrigerator before cooking.