To cook a spiral ham, which is typically pre-cooked and only needs to be heated through, the general guideline is to bake it at 325°F for about 12 to 15 minutes per pound. For example, an 8 to 11-pound spiral ham will take roughly 1.5 to 2.5 hours to heat properly

. Key points for cooking spiral ham:

• Preheat oven to 325°F.
• Place the ham cut side down in a roasting pan.
• Cover the ham tightly with foil to retain moisture.
• Bake for 12-15 minutes per pound until the internal temperature reaches 140°F, using a meat thermometer to check doneness

• If glazing, apply the glaze during the last 15-20 minutes of cooking, removing the foil to allow the glaze to caramelize without burning

• Let the ham rest covered for at least 15 minutes after removing it from the oven to allow juices to redistribute

For example, a 10-pound spiral ham would take about 1 hour and 30 minutes to 2 hours and 30 minutes at 325°F, depending on whether it's covered or uncovered and the exact cooking method

. In summary:

• Cook at 325°F
• 12-15 minutes per pound
• Heat until internal temp is 140°F
• Glaze in last 15-20 minutes uncovered
• Rest 15 minutes before slicing

This method ensures the ham is heated thoroughly without drying out.