Spiral-cut hams from the grocery store are already cooked, and often smoked. That doesn’t mean that they can’t get even more awesome with a little more time on a smoker.
Fire up a smoker for cooking at 225 F. You can also make this in an oven or on a grill over indirect heat, but be careful to not dry out the ham - keep the temperature low and baste it often.
Add 2 small chunks of cherry or apple wood. Do not add very much wood or it will over-power the ham, since it is already smoked.
Sprinkle the ham with the rub and massage it into the meat. Transfer the ham to the smoker.
Combine the syrup and butter.
Every 1 hour, baste the ham with the basting sauce.
Continue cooking for about 5 hours or until the internal temperature of the ham reaches 140 F. Remember, the ham is already cooked. You're just warming it and adding flavor.
Let the ham rest for 20-30 minutes before carving.