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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.
Pick an uncooked ham, if you want to cook it yourself. Most spiral hams or honey-baked hams are pre-cooked, meaning you simply have to warm it up in the oven for 10 minutes per lb. (0.45 kg). 1  You may be able to pick between a half-ham roast and a full-ham roast. (4.5 to 6.4 kg) hams for 22 to 25 minutes per lb. (0.45 kg). 2  Cook a larger ham for 18 to 22 minutes per lb. 3  Always check the core temperature with a meat thermometer.