Whether you have a massive leftovers haul from a holiday feast or you’ve just purchased a pre-cooked spiral ham from the local deli, knowing exactly how long to warm cooked ham is the difference between a succulent, juicy centerpiece and a dry, salty disappointment. Most hams sold in grocery stores are already fully cooked or smoked, meaning your job isn’t technically “cooking” the meat, but rather gently bringing it up to a palatable temperature without stripping away its natural moisture.
This guide explores the nuances of reheating various types of ham, the specific timing required for different appliances, and the professional tips that ensure every slice is as tender as the first.
Understanding Your Ham Type Before Reheating
Before you set your timer, you must identify what kind of ham you are working with. The labeling on the packaging dictates your strategy.
Fully Cooked Hams
Most hams found in the supermarket are labeled as “fully cooked.” These have been heated to an internal temperature high enough to kill bacteria during the manufacturing process. When reheating these, your goal is simply to reach an internal temperature of 140°F.
Partially Cooked or Smoked Hams
Some hams are only partially cooked or are “cook-before-eating” hams. These require more time and higher temperatures because you are finishing the cooking process. These must reach an internal temperature of 160°F to be safe for consumption.
Spiral-Cut vs. Whole Hams
Spiral-cut hams are convenient but prone to drying out because the heat can penetrate the slices more easily. Whole hams or “butt/shank portions” take longer to warm through to the bone but generally retain their moisture better than their pre-sliced counterparts.
How Long to Warm Cooked Ham in the Oven
The oven is the gold standard for reheating ham. It provides even heat distribution and allows you to use moisture-locking techniques like foil tenting.
The Low and Slow Method
To keep the meat tender, a lower temperature is ideal. Preheat your oven to 325°F. Place the ham in a roasting pan with a small amount of liquid (water, apple juice, or cider) at the bottom.
For a whole, bone-in cooked ham, you should plan for 15 to 18 minutes per pound. For a smaller boneless ham, 10 to 15 minutes per pound is usually sufficient. If you are reheating a spiral-cut ham, aim for the lower end of that spectrum—about 10 to 12 minutes per pound—as the slices allow heat to travel faster.
Using a Roasting Bag
If you want to speed up the process slightly while guaranteeing moisture, a roasting bag is a great tool. In a 325°F oven, a ham in a roasting bag usually takes about 12 to 15 minutes per pound. The steam trapped inside the bag acts as a buffer against the dry heat of the oven.
Warming Ham in a Slow Cooker
The slow cooker is an excellent choice if you have a smaller ham or a ham portion that fits comfortably under the lid. It is arguably the best way to prevent the meat from drying out.
Timing for the Slow Cooker
Place your ham in the crock with about half a cup of liquid. Set the slow cooker to “Low.” On this setting, a 5-pound ham will take approximately 3 to 4 hours to warm through completely.
Avoid using the “High” setting if possible. While it might cut the time down to 1.5 to 2 hours, it increases the risk of the edges becoming tough and the sugars in any glaze burning against the sides of the ceramic pot.
How Long to Warm Cooked Ham in the Air Fryer
The air fryer is perfect for reheating individual slices or small ham steaks rather than a whole roast. Because air fryers use intense convection heat, the process is very fast.
Slices and Steaks
For a thick slice of ham, preheat the air fryer to 320°F. Place the slice in the basket and heat for 3 to 5 minutes. If you are reheating a small 2-pound boneless ham, wrap it tightly in foil first and heat it for about 20 to 25 minutes, checking the internal temperature frequently.
Reheating Ham on the Stovetop
If you are only looking to warm up a few slices for a sandwich or breakfast, the stovetop is the most efficient route.
Searing for Flavor
Place a skillet over medium heat. Add a teaspoon of butter or oil to the pan. Place the ham slices in the pan and cook for 2 to 3 minutes per side. This doesn’t just warm the ham; it caramelizes the edges, adding a depth of flavor that the oven cannot provide.
Essential Tips for Maintaining Moisture
The biggest enemy of a reheated ham is evaporation. Since the meat has already been cooked once, the protein fibers are set, and they tend to squeeze out moisture when reheated.
The Importance of Foil
Always wrap your ham tightly in heavy-duty aluminum foil if you are using the oven. This creates a localized “steam room” for the meat. For spiral hams, ensure the foil is tucked in well around the bottom to prevent the juices from escaping into the pan.
Adding Liquids
Never reheat a ham “dry.” Whether you use water, pineapple juice, ginger ale, or a mixture of honey and bourbon, adding a liquid to the bottom of your cooking vessel provides the necessary humidity to keep the meat fibers supple.
The Rest Period
Just like a fresh steak, a reheated ham needs to rest. Once the ham reaches an internal temperature of 140°F, remove it from the heat source and let it sit, still wrapped in foil, for at least 15 to 20 minutes. This allows the juices to redistribute so they don’t all run out the moment you cut into the meat.
How to Tell When Your Ham is Done
While time-per-pound estimates are helpful, they are not foolproof. Every oven and slow cooker fluctuates in temperature. The only way to be 100% certain is to use a meat thermometer.
Insert the thermometer into the thickest part of the ham, ensuring you do not hit the bone, as the bone conducts heat differently and will give you a false reading. For a fully cooked ham, you are looking for 140°F. If you are reheating a ham that was not “fully cooked” at the factory, you must reach 160°F for safety.
FAQs
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How long does it take to warm a 10 pound cooked ham?
In a 325°F oven, a 10-pound bone-in cooked ham will take between 2.5 and 3 hours. This assumes you are following the rule of 15 to 18 minutes per pound. Always start checking the internal temperature about 30 minutes before the estimated finish time. -
Can I reheat a cooked ham more than once?
While it is technically safe to reheat ham more than once as long as it reaches the proper internal temperature each time, it is not recommended for quality. Each reheating cycle removes more moisture, eventually leaving the ham with a rubbery or woody texture. It is better to only reheat what you plan to eat. -
Do I need to glaze the ham while it warms?
Glazing is optional but recommended for flavor. However, you should not apply the glaze at the beginning of the reheating process. Most glazes contain high amounts of sugar, which can burn during a long warming period. Apply your glaze during the last 20 to 30 minutes of heating, increasing the oven temperature to 400°F briefly if you want a caramelized crust. -
Is it safe to eat cold cooked ham?
Yes, if the ham was labeled as “fully cooked” or “ready-to-eat” at the time of purchase, it is perfectly safe to consume cold straight from the refrigerator. Reheating is done primarily for preference and to enhance the flavor of the fats and seasonings. -
How long can cooked ham stay in the refrigerator before reheating?
Once a cooked ham has been opened or prepared, it should be consumed within 3 to 5 days if kept in a refrigerator set to 400°F or below. If you cannot finish the ham within that timeframe, it is best to slice it and freeze it for up to 2 months.