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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.
Step 2. Place your spiral-smoked ham in a shallow roasting pan. If the ham is half-or quarter-sized, place the ham flat-side down. If you have a whole ham, lay it fat-side up in the pan. Step 3. Cover the pan with foil and place in the oven. Heat the ham for 10 to 15 minutes per pound.tep 4. Remove the ham from the oven and let it sit covered for 20 to 30 minutes before serving. To slice a bone-in ham, use a sharp knife to cut along the seam lines of the ham well as around the bone; the slices will lift easily with a fork.