Follow these steps to cook spiral hams of any size: 1. Remove all packaging from the ham. 2. Cover spiral ham tightly with foil, no steam escapes. Place CENTER of oven. 4. Put the spiral ham in pan with rack in the bottom and with the fat side UP. Pour package juices in the bottom of the pan to avoid drying it out. Place the ham cut-side down on a roasting pan (if using a disposable aluminum roasting pan place it atop a baking pan for support). Preheat 325. To glaze this type of ham, turn the oven to 400°F, brush the ham with the glaze, and bake for 10-15 minutes until the glaze is browned and bubbling. How To Cook a Spiral Ham. How to Cook Spiral Ham Without Drying It Out. 5. Let … 3. If you’re wondering how to cook a spiral ham, here’s everything you need to know! The presliced spiral technique, invented by Harry Hoenselaar in 1957, ensures even, thin slices that absorb the delicious flavors of glaze while cooking. Preheat the oven to 350F. Spiral ham comes fully cooked, all you have to do is heat and serve! Cover the ham with foil or a lid to prevent it from drying out. Remove spiral ham from package, reserve the liquid. Cooking a spiral ham, like copycat honey baked ham, is so easy that it practically cooks itself.. Spiral hams are popular at Easter and Christmas dinner alongside mashed potatoes or Scalloped Potatoes and turkey, but you can buy them year-round! Because the ham is generally sliced much thinner than the average home cook can manage with a carving …