A precooked ham is the ultimate “cheat code” for a stress-free holiday dinner or a massive Sunday feast. Because the heavy lifting—the curing, smoking, and initial cooking—has already been done by the butcher or the processing plant, your job isn’t really to “cook” the meat. Instead, your mission is to warm it through without turning that beautiful, juicy center into a piece of salty leather.
Reheating a ham is an exercise in moisture management. Whether you have a spiral-sliced ham, a whole bone-in ham, or a boneless ham, the goal is to reach a safe internal temperature while preserving the fats and juices that make ham so delicious. If you’ve ever sat down to a plate of dry, curled-up ham slices, you know exactly what we’re trying to avoid.
Choosing Your Reheating Method
The best way to reheat a ham depends largely on how much time you have and the size of the ham. While the oven is the traditional choice for a whole ham, smaller portions or even whole hams can be handled beautifully in a slow cooker, an air fryer, or even on the stovetop.
Regardless of the method, the most important tool in your kitchen is a meat thermometer. Since the ham is already cooked, you are looking for an internal temperature of 140°F. This is the sweet spot where the meat is piping hot but hasn’t started to lose its structural integrity and moisture.
The Oven Method: The Gold Standard for Whole Hams
The oven is the most reliable way to reheat a large precooked ham. It provides even, ambient heat that can penetrate thick cuts of meat. To prevent the exterior from drying out before the center is warm, you need to use a low temperature and a bit of liquid.
Preparation and Setup
Preheat your oven to 325°F. This lower temperature ensures the ham warms up slowly. Remove the ham from its packaging and discard the plastic disc that often covers the bone. Place the ham in a roasting pan. If it is a half ham, place it flat-side down to protect the most vulnerable part of the meat from direct air contact.
The Secret to Moisture
Add about a half-cup of water, apple juice, or chicken broth to the bottom of the pan. This liquid creates a steam-filled environment. Cover the entire roasting pan tightly with heavy-duty aluminum foil. If the foil isn’t tight, the steam escapes, and your ham will dry out.
Timing Your Roast
Typically, you should plan for 10 to 14 minutes per pound. A 10-pound ham will take roughly two hours to reach that target of 140°F. If you have a spiral-sliced ham, reduce the time slightly, as the heat penetrates the slices much faster. Check the internal temperature about 30 minutes before you think it will be done to avoid overcooking.
The Slow Cooker Method: Hands-Off and Extra Juicy
If you are working with a smaller ham or a “mini” ham, the slow cooker is arguably the best tool for the job. It is a closed system that traps moisture perfectly.
Fitting the Ham
For a slow cooker, you usually need a ham that is 8 pounds or smaller. If the lid doesn’t fit perfectly, you can create a “tent” out of aluminum foil to seal the top, though a sealed lid is always preferable. Place the ham in the crock and add a splash of liquid—pineapple juice is a classic choice here as the acidity helps tenderize the meat.
Cooking Settings
Set the slow cooker to Low. Reheating on High can sometimes cause the edges of the ham to become tough. On the Low setting, a small ham will usually take 4 to 6 hours to reach the desired temperature. This method is perfect for those who want to set it and forget it while focusing on side dishes.
The Air Fryer Method: Quick and Crispy
Air fryers are essentially high-powered convection ovens. While they aren’t ideal for a 15-pound bird, they are fantastic for ham steaks or small boneless hams.
Reheating Ham Steaks
If you are just reheating a few thick slices, place them in the air fryer basket at 350°F. You don’t need to add water, but a light brush of maple syrup or honey can help create a nice caramelized crust. Cook for 3 to 5 minutes, flipping halfway through.
Reheating Small Roasts
For a small 2-pound boneless ham, wrap it tightly in foil first. Place it in the air fryer at 300°F for about 20 to 30 minutes. The foil is essential here; without it, the air fryer’s intense fan will turn the outside of your ham into jerky.
Adding the Perfect Glaze
Most precooked hams come with a glaze packet, but making your own is a simple way to elevate the meal. A good glaze needs a sugar base—like brown sugar, honey, or maple syrup—and an acid—like cider vinegar, mustard, or fruit juice.
When to Apply Glaze
Never put the glaze on at the beginning of the reheating process. The high sugar content will burn long before the ham is warm. Instead, wait until the internal temperature of the ham reaches about 130°F.
The Finishing Touch
Remove the ham from the oven and turn the heat up to 400°F. Carefully remove the foil and brush the glaze generously over the surface. Return the ham to the oven uncovered for 10 to 15 minutes. This allows the glaze to bubble, thicken, and brown into a delicious lacquer. Watch it closely to ensure it doesn’t cross the line from caramelized to burnt.
Handling Spiral Sliced Hams Specifically
Spiral sliced hams are incredibly convenient because the carving is already done, but they are the most prone to drying out. Because the muscle fibers are cut, the moisture can evaporate from every slice simultaneously.
To combat this, you must be extremely diligent with the foil wrap. Some chefs even recommend wrapping the ham in parchment paper first, then foil, to create an even better seal. When reheating spiral hams, aim for the lower end of the time spectrum—about 10 minutes per pound—to ensure the slices stay succulent.
Safety and Storage Tips
Once your ham has been reheated and served, you need to handle the leftovers properly. Do not leave the ham sitting out on the counter for more than two hours. Bacteria thrive at room temperature, and even though ham is cured, it is still perishable.
Storing Leftovers
Carve the remaining meat off the bone and store it in airtight containers or zip-top bags. Leftover ham will stay fresh in the refrigerator for 3 to 5 days. If you can’t finish it by then, ham freezes exceptionally well for up to 2 months.
Don’t Toss the Bone
If you had a bone-in ham, keep that bone! The ham bone is packed with flavor and gelatin. You can freeze it and drop it into a pot of split pea soup, navy bean soup, or even a batch of collard greens later. It provides a smoky, salty depth that you simply can’t get from store-bought broth.
Common Mistakes to Avoid
The most frequent error is reheating the ham at too high a temperature. Anything over 325°F for the main reheating phase will likely result in a dry product. Patience is your best friend.
Another mistake is forgetting to rest the meat. Just like a steak or a prime rib, ham benefits from a 10 to 15-minute rest after it comes out of the oven. This allows the juices to redistribute so they don’t all run out onto the cutting board the moment you start slicing.
Frequently Asked Questions
Can I reheat a precooked ham more than once?
It is generally safe to reheat a precooked ham more than once, provided it was cooled quickly and stored properly after the first reheat. However, every time you reheat the meat, you lose moisture. For the best quality, try to only reheat the portion you plan to eat immediately.
Do I have to reheat a precooked ham at all?
No, you do not. Because the ham is “precooked” or “fully cooked,” it is technically safe to eat straight out of the refrigerator. Many people enjoy cold ham in sandwiches or salads. Reheating is purely for the sake of texture, flavor, and the tradition of serving a hot main course.
How do I know if my ham is “fully cooked” or “cook before eating”?
Always check the label. A “fully cooked” ham can be eaten cold or reheated to 140°F. A ham labeled “cook before eating” or “fresh ham” is raw and must be cooked to an internal temperature of 145°F and then allowed to rest. Most hams found in the grocery store around the holidays are fully cooked.
What is the best liquid to use in the bottom of the roasting pan?
While water works fine, using a flavored liquid adds a subtle aroma to the meat. Apple cider, pineapple juice, ginger ale, or even a dry white wine are excellent choices. Avoid using anything too salty, like a heavy beef bouillon, as the ham is already naturally high in sodium.
My ham is still cold in the middle but looks dry on the outside. What should I do?
If the exterior is drying out but the center isn’t warm, your oven might be too hot or your foil seal isn’t tight enough. Lower the oven temperature to 300°F, add a bit more liquid to the pan, and ensure the foil is wrapped snugly around the edges of the pan. If the outside is already quite dry, you can brush a little melted butter or apple juice directly onto the meat before resealing the foil.