Bake. Place the roasting pan onto the middle of your oven’s center rack (adjust racks if needed to accommodate size). Then, bake at 325°F (163°C) for 50 minutes to 1 hour. Using 15-minute intervals, baste the ham, making sure that you close the oven door to retain heat. If desired, broil for the last 5 minutes to caramelize the glaze before removing from the oven.