how to cook butt portion of cooked ham
1 Preheat the oven to 325Â°F. Place the ham on a rack in a shallow roasting pan. 2  For a whole 10- to 15-pound ham, allow 18 to 20 minutes per pound; for a half--5 to 7 pounds--about 20 minutes per pound; or for a shank or butt portion weighing 3 to 4 pounds, about 35 minutes to the pound.reparation. 1  1. Ham labeled Cook Before Eating. 2  Preheat the oven to 325Â°F. Place the ham on a rack in a shallow roasting pan. 3  II. 4  Preheat the oven to 325Â°F. 5  Stud the fat at the intersections of the diamonds with whole cloves. 6  Return the ham to the oven, reduce the oven heat to 325Â°F again, and cook about 30 minutes.