Reheating a fully cooked ham might seem like a straightforward task, but there is a fine line between a succulent, juicy centerpiece and a dry, salty disappointment. Since the ham is already cooked, your primary goal is not to cook it further, but to bring it up to an appetizing serving temperature while preserving its moisture and enhancing its natural flavors. Whether you have a spiral-cut ham, a whole bone-in ham, or a boneless ham, the process requires patience, the right equipment, and a few trade secrets.
Understanding Your Fully Cooked Ham
Before you even turn on the oven, it is essential to understand what you are working with. Most hams purchased at the grocery store are labeled as “fully cooked” or “ready to eat.” These have been cured and often smoked. While you could technically eat them cold, most people prefer the warmth and caramelized exterior that comes from reheating.
The two most common varieties are bone-in and boneless. Bone-in hams are widely considered to have better flavor and a more traditional appearance, though they are harder to carve. Boneless hams are essentially pressed into a shape, making them incredibly easy to slice for sandwiches or quick dinners. Then there is the “spiral-cut” variety, which has been pre-sliced all the way to the bone. While convenient, spiral hams are the most prone to drying out because the heat can easily penetrate the meat through the pre-cut slices.
Preparation Steps Before Heating
To ensure the best results, take the ham out of the refrigerator about 30 to 60 minutes before you plan to put it in the oven. Taking the chill off the meat allows it to heat more evenly. If you put a stone-cold ham into a hot oven, the exterior will likely dry out before the center reaches the desired temperature.
During this time, you should also inspect the ham for any plastic discs or packaging remnants. Often, bone-in hams have a small plastic guard over the bone end that must be removed. This is also the perfect time to decide on your liquid. Moisture is the enemy of dryness, so plan to use a small amount of liquid in the bottom of your roasting pan. Water works fine, but apple juice, pineapple juice, or even a splash of white wine can add a subtle layer of complexity to the meat.
The Oven Method: Low and Slow
The oven is the most reliable way to reheat a ham, especially if you are serving a large crowd. The golden rule for reheating a fully cooked ham is “low and slow.” High temperatures will zap the moisture out of the meat before it’s even warm in the middle.
Set your oven to 325°F. Place the ham in a heavy roasting pan. If it is a half-ham, place it flat-side down to protect the interior meat from direct heat. Pour about a half-cup of your chosen liquid into the bottom of the pan. This creates a steamy environment that keeps the ham hydrated.
The most critical step in the oven method is the seal. Wrap the entire pan tightly with heavy-duty aluminum foil. You want to create a tent that traps the steam inside. If the foil is loose, the moisture will escape, and you’ll end up with a “ham jerky” texture on the outer edges.
For a whole ham, plan on roughly 15 to 18 minutes per pound. For a half ham, 18 to 24 minutes per pound is usually sufficient. Your goal is to reach an internal temperature of 140°F. Using a meat thermometer is the only way to be 100% sure. Insert it into the thickest part of the meat, making sure it doesn’t touch the bone, as the bone will give a false, higher reading.
Reheating a Spiral-Cut Ham
Spiral hams require extra care. Because the meat is already sliced, it has significantly more surface area exposed to the air. To prevent it from drying out, follow the same “low and slow” oven method at 325°F, but consider wrapping the ham itself in foil before placing it in the pan.
Some chefs recommend placing the spiral ham cut-side down on a bed of fruit like pineapple slices or orange rounds. This provides a physical barrier between the meat and the pan while infusing the ham with moisture. Check the temperature frequently starting at the 10-minute-per-pound mark to ensure you don’t overshoot that 140°F target.
Slow Cooker Method for Smaller Hams
If you have a smaller ham or a boneless ham that fits comfortably in your slow cooker, this is perhaps the best way to maintain moisture. The sealed environment of a slow cooker is perfect for “steaming” the ham back to life.
Place the ham in the slow cooker and add a cup of liquid—cider or ginger ale works beautifully here. Cover and cook on the “Low” setting for about 4 to 5 hours. Avoid the “High” setting, as it can cause the sugars in the ham’s cure to burn or the edges of the meat to become tough. This method is particularly useful during the holidays because it frees up your oven for side dishes and rolls.
The Art of the Glaze
Most fully cooked hams come with a glaze packet, or you can make your own using brown sugar, honey, mustard, and spices. However, timing is everything. Do not apply the glaze at the beginning of the reheating process. Most glazes have a high sugar content, and if they sit in the oven for two hours, they will burn and turn bitter.
Wait until the ham has reached an internal temperature of about 130°F. Remove the ham from the oven, carefully peel back the foil, and brush your glaze generously over the surface. Increase the oven temperature to 400°F or turn on the broiler. Return the ham to the oven uncovered for 10 to 15 minutes. Watch it like a hawk during this stage; you want the glaze to bubble and caramelize into a sticky, dark coating, but it can go from perfect to burnt in a matter of seconds.
Reheating Individual Slices
If you aren’t feeding a village and just want to reheat a few slices for breakfast or a sandwich, the oven is overkill. For a single meal, the stovetop is your best friend.
Place a skillet over medium heat and add a teaspoon of butter or oil. Once hot, place the ham slices in the pan. Add a tablespoon of water or orange juice and immediately cover the pan with a lid. This creates a “mini-sauna” that heats the slices through in about 2 to 3 minutes without making them rubbery.
The microwave is an option of last resort. If you must use it, wrap the ham slices in a damp paper towel and use 50% power in 30-second bursts. High power in the microwave will almost certainly turn the ham into a chewy, unappealing texture.
Resting the Ham
Once the ham has reached 140°F and your glaze is perfectly tacky, remove it from the heat. This is the most skipped step, but it is vital. Let the ham rest for at least 15 to 20 minutes before carving. Resting allows the juices to redistribute throughout the meat. If you cut into it immediately, all that precious moisture you worked so hard to preserve will simply run out onto the cutting board, leaving the meat dry. Keep it loosely covered with foil during this time to retain the heat.
Frequently Asked Questions
- Can I reheat a ham that has already been reheated once?
- It is generally safe to reheat ham more than once, provided it was cooled quickly and stored properly in the refrigerator. However, each time you reheat the meat, you lose moisture and quality. If you have a large amount of leftovers, it is better to only reheat the portion you plan to eat rather than warming the entire ham repeatedly.
- What is the safe temperature for reheating ham?
- According to food safety guidelines, a fully cooked ham that has been packaged in a federally inspected plant should be reheated to an internal temperature of 140°F. If the ham was not packaged in such a plant, or if you are reheating leftover ham that you prepared yourself, it should be heated to 165°F to ensure any potential bacteria are destroyed.
- How do I prevent the edges of a spiral ham from curling?
- Edge curling and drying occur when the heat hits the thin slices too intensely. To prevent this, ensure the ham is placed cut-side down in the pan and that your foil seal is airtight. You can also brush a little melted butter or glaze between the slices halfway through the heating process to provide a protective fat barrier.
- Can I reheat a ham from frozen?
- It is not recommended to reheat a ham directly from the freezer. The outside will become dangerously overcooked and dry before the center even thaws. For the best results, thaw the ham in the refrigerator for 24 to 48 hours (depending on size) before following the reheating instructions.
- Why did my ham turn out salty after reheating?
- Ham is naturally high in sodium because of the curing process. When you reheat it and the moisture evaporates, the concentration of salt increases. To combat this, always use a liquid in the bottom of your pan and keep the ham tightly covered. If you find your ham is consistently too salty, you can soak it in cold water for an hour before reheating to draw out some of the excess brine.