How do you cook a fully cooked ham?
Follow these simple steps for baking a juicy, delicious fully cooked ham in the oven: 1. Remove any packaging and trim off skin/fat. Unwrap the ham and discard any plastic, netting, or paper. Use a knife to trim off any tough outer skin or thick layers of fat, leaving about a 1/4 inch layer of fat. 2. Score the fat in a diamond pattern.