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Typically this is about 18 minutes per pound but Iâll sometimes pull mine out about 20 minutes before that since it will stay warm in the tinfoil (and even room temperature ham is MUCH better than dry)! Most directions for cooking a spiral sliced ham tell you to reheat your ham at 275F and I agree with this method.
Fortunately, reheating a Hillshire Farms spiral sliced ham is a simple process that takes around 60 to 90 minutes. Remove the store packaging from the ham and set the glazing packet aside until later. Wrap the entire ham in aluminum foil. Make sure to seal the edges of the foil. Alternatively, you can place the ham in a large roasting bag and twist tie the end of the bag closed. Place the ham, flat side down, in a large roasting pan. Preheat the oven to 325 degrees. Place the ham into the oven and cook for 8 to 12 minutes per pound.