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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.
I have bought a spiral cut ham several times, and have always baked in the oven. If you have a glaze pack, make that up and brush over the ham the last 15-20 minutes of baking. Then let the ham rest 20 minutes prior to serving (so the glaze can set).If you do not have baking time instructions, refer to a cook book. All your doing is warming the ham, as it is already cooked.f you have a glaze pack, make that up and brush over the ham the last 15-20 minutes of baking. Then let the ham rest 20 minutes prior to serving (so the glaze can set). If you do not have baking time instructions, refer to a cook book.