Add all of the ingredients to a saucepan and heat over medium-low heat.
Continue to cook until brown sugar has completely dissolved. Remove from heat.
How to Cook a Spiral Ham in a Slow Cooker:
Remove and discard the packaging from the spiral ham, including the small plastic disc on the underside of the bone.
Place the spiral ham in the slow cooker, cut side down.
Pour all of the honey glaze over the ham, place on the lid, and cook on low for 2-3.5 hours or until the internal temperature reaches 140°F. Using the large spoon, baste the ham every hour or so with the juices in the bottom of the slow cooker.
Using two large spoons, carefully remove the ham from the slow cooker and place on a large serving platter. Cover with foil and allow to rest for at least 15 minutes before serving.
How to Cook a Spiral Ham in the Oven:
Preheat oven to 325°F.
Remove and discard the packaging from the spiral ham, including the small plastic disc on the underside of the bone.
Place the spiral ham in the bottom of a roasting pan, cut side down. Pour half of the glaze over the ham and cover with foil, tenting the foil over the ham so it doesn't touch the surface of the meat.
Bake for 10-12 minutes per pound, roughly 1 to 1.5 hours, or until the internal temperature of the thicket part of the ham reaches 140°F. Remove the foil and pour the remaining half of the honey glaze on top of the ham in the last 20 minutes of cooking time.
Remove from the oven, cover with foil and allow to rest for at least 15 minutes before serving.