how long to cook smoked ham
2 1/2 hours. Here's how: Preheat the oven to 325, place the ham on a rack in a baking dish with a little water in the bottom. Wrap in foil, bake for about 2 hours, or until th â¦ e internal temperature is 135 - 140 degrees.5 minutes per pound at 350 degrees. So, for a 7 lb. ham you are looking at just over an hour. If you aren't sure, cut a small slit on the largest part of the ham and feel if it's warmed through. Bone-in hams cook faster.