To cook a fully cooked ham, the most common and effective method is baking it with a glaze to warm it through and add flavor. Here is a step-by-step guide based on expert recommendations:

How to Cook a Baked Glazed Ham

1. Preheat the Oven: Set your oven to 325°F (163°C).
2. Prepare the Ham:
   • Remove the ham from its packaging and pat it dry.
   • Score the fat in a crosshatch pattern about 1/8 to 1/4 inch deep, spacing cuts about 1/2 to 1 inch apart. This allows the glaze to penetrate and caramelize nicely

 * Place the ham fat-side up on a rack in a roasting pan.
 * Add about 1/2 to 1 inch of water to the bottom of the pan to keep the ham moist during cooking

3. Initial Baking:
   • Cover the ham loosely with foil.
   • Bake for about 10 minutes per pound at 325°F. For example, a 10-pound ham would bake about 1 hour 40 minutes initially

 * If using a spiral-cut ham, you may bake uncovered for some time after an initial covered period

4. Prepare the Glaze:
   • Common glaze ingredients include brown sugar, mustard (Dijon or spicy brown), cider vinegar or apple cider, honey or maple syrup, and sometimes fruit preserves like apricot or marmalade

 * Heat glaze ingredients in a saucepan over medium heat until bubbly and slightly thickened (about 10-15 minutes)

5. Glazing and Final Baking:
   • Remove the foil from the ham.
   • Brush the ham generously with the glaze.
   • Increase oven temperature to 425°F (218°C).
   • Return the ham to the oven and bake uncovered for about 30 minutes, brushing with glaze every 15 minutes to build up a sticky, caramelized crust

 * Continue until the ham is heated through (internal temperature about 140°F) and the glaze is browned and glossy

6. Rest and Serve:
   • Remove the ham from the oven.
   • Let it rest for 15-20 minutes before carving to allow juices to redistribute

 * Carve and serve.

Additional Tips

• Use a roasting rack to keep the ham elevated above the water for even cooking

• Save the ham bone for making soups or stews later

• For added texture, sprinkle herb or breadcrumb mixes on the glaze before the last baking period

• Avoid adding salt since most hams are already salty

This method works well for fully cooked bone-in hams, including spiral-cut hams, which are popular for ease of serving

. By following these steps, you will achieve a warm, flavorful, and beautifully glazed ham perfect for any occasion.