Question: how to cook a fully cooked frozen ham in crock pot?
Answer: If you decide to cook your ham in a slow cooker—and you have a Crock-Pot large enough to fit it—cook it on the low setting for at least 6 to 8 hours. If you're working with a larger frozen ham, you may need to allow up to 12 hours for it to fully cook. (Check the temp with your meat thermometer!)