Smoked hams are fully cooked hams that have been cooked through a variety of processes. Some smoked hams are naturally smoke-flavored due to the cooking method (such as using a slow smoker with wood), while others are milder and have smoke flavoring added to them. Either way, they come from the store ready to eat right out of the package. If you do not want to eat your smoked ham cold, you can heat it; heating a smoked ham is very easy.
Preheat your oven to 325 degrees.
Calculate your cooking time: multiply the weight of the ham (in pounds) by 10. That is how many minutes you need to safely heat the ham in the oven to a temperature of 140 degrees.
Remove all packaging from the smoked ham. Failing to do so could cause melting or even a fire once placed in a hot oven.
Place the smoked ham in an oven-safe pan or dish and place in the oven.
Check the temperature of the ham after the calculated heating time has passed. Once the thermometer reads 140 degrees, your smoked ham is warmed through and ready to eat.