01 -
Preheat oven to 165°C and position the rack in the lower third.
02 -
Place the spiral ham cut side up in a large roasting pan.
03 -
Rub Dijon mustard evenly over the surface of the ham.
04 -
Combine brown sugar, paprika, kosher salt, chili powder, garlic powder, onion powder, dry mustard, black pepper, and cayenne pepper in a bowl. Sprinkle mixture over the ham and press gently to adhere.
05 -
Roast the ham uncovered for 30 minutes.
06 -
In a saucepan over medium heat, melt unsalted butter. Stir in brown sugar, bourbon, and maple syrup. Cook, stirring occasionally, until the glaze thickens slightly.
07 -
Baste the ham generously with the prepared glaze. Cover loosely with foil and continue roasting for approximately 2 hours, basting every 30 minutes until the internal temperature reaches 60°C.
08 -
Pour any remaining glaze over the ham 10 minutes before removing from the oven. Let the ham rest for 15 minutes before slicing and serving.