Preheat the oven to 350 degrees F.
Place the ham on a rack in a foil-lined roasting pan, fat-side up. Roast for 1 hour 30 minutes.
Meanwhile, in a medium saucepan set over medium heat, mix the honey, sugar, cornstarch, cayenne and red pepper flakes together. Stir until a thick glaze forms. Rub half of the glaze on the ham and bake for another 30 minutes.
Add the remaining glaze and cook until a thermometer inserted in the ham reads 140 degrees F, 30 minutes.
Remove from the oven and rest the ham for at least 15 minutes before serving.
Recipe courtesy of Kimberly Schlapman