When it comes to holiday dinners or a cozy Sunday feast, a succulent, glazed ham is often the centerpiece of the table. However, many people struggle with the reheating process. Because ham is typically sold pre-cooked, your goal isn’t to cook it from scratch, but to warm it through without turning it into a salty piece of leather. Learning how to heat up ham in a crock pot is the most effective way to ensure your meat remains tender, juicy, and flavorful. Using a slow cooker provides a gentle, moist environment that a dry oven simply cannot replicate.
Why Use a Slow Cooker for Reheating Ham?
The oven is the traditional choice for many, but it is also the most common culprit behind dry, stringy ham. A crock pot acts as a self-basting environment. As the ham warms, the moisture trapped under the lid creates steam, which keeps the fibers of the meat from tightening and drying out. Additionally, a slow cooker frees up your oven space for side dishes like roasted vegetables, rolls, or casseroles, making it a strategic choice for large gatherings.
Choosing the Right Ham for Your Crock Pot
Before you start, you need to ensure your ham will actually fit in your appliance. Most standard 6-quart to 7-quart crock pots can comfortably hold a 7-pound to 8-pound ham.
Spiral Sliced vs. Whole Hams
Spiral sliced hams are incredibly convenient because they are already cut down to the bone. However, they are much more prone to drying out because there is more surface area exposed to the air. If you are using a spiral ham, the crock pot method is even more critical. Whole or “nugget” hams are easier to keep moist but require more effort to carve later.
Bone-In vs. Boneless
Bone-in hams generally have better flavor and the bone helps distribute heat through the center of the meat. Boneless hams are easier to fit into smaller crock pots and are simpler to slice. Regardless of which you choose, the reheating instructions remain largely the same.
Preparing Your Ham for the Slow Cooker
Preparation is the key to a successful meal. You cannot simply throw a cold ham into a pot and expect greatness.
Bringing the Meat to Room Temperature
If time allows, take the ham out of the refrigerator about 30 to 60 minutes before you plan to start heating it. This takes the chill off the meat and allows for more even heating. Jumping from 38°F to a warm state takes a lot of energy, and the outside might overcook before the center is warm if you start from ice-cold.
Trimming for Fit
If you find that your ham is just a bit too large for the lid to close, don’t panic. You can trim a slice or two off the bottom or the sides to make it fit. If it is still too tall, you can create a “tent” over the top using heavy-duty aluminum foil. Ensure the foil is sealed tightly around the edges of the stoneware to trap the steam inside.
The Essential Liquid Element
Never heat a ham in a crock pot without adding liquid. Without it, the bottom of the ham will scorch, and the rest will dry out. You need about 1/2 cup to 1 cup of liquid at the bottom of the pot.
Flavorful Liquid Options
- Water: The simplest option, though it adds no extra flavor.
- Apple Juice or Cider: Adds a subtle sweetness that pairs perfectly with pork.
- Pineapple Juice: The acidity helps tenderize the meat while adding a classic tropical note.
- Chicken Broth: Adds a savory depth without extra sweetness.
- Ginger Ale or Cola: The sugar and carbonation help create a nice glaze and tenderize the meat.
Step-by-Step Instructions for Reheating
Follow these steps to ensure your ham reaches the perfect temperature.
Positioning the Ham
Place the ham in the slow cooker with the flat side (the cut side) facing down. This helps the meat absorb the liquid from the bottom and protects the more delicate slices from direct heat.
Setting the Temperature
Always use the Low setting on your crock pot. While it might be tempting to use the High setting to speed things up, doing so increases the risk of boiling the juices out of the meat. Slow and steady is the secret to a juicy ham.
Timing the Process
For a pre-cooked ham, you generally need to heat it for 20 to 30 minutes per pound.
- A 5-pound ham will take about 2 to 3 hours.
- An 8-pound ham will take about 4 to 5 hours.
The internal temperature should reach 140°F before serving. This is the USDA-recommended temperature for reheating pre-cooked ham to ensure food safety while maintaining quality.
Crafting the Perfect Glaze
While the ham is heating, you can prepare a glaze to add during the final hour of cooking. A glaze adds that signature sticky, sweet crust that everyone loves.
Honey and Brown Sugar Glaze
A classic combination involves mixing 1/2 cup of brown sugar, 1/4 cup of honey, 2 tablespoons of Dijon mustard, and a pinch of ground cloves.
Applying the Glaze
Wait until the last 30 to 45 minutes of the heating process to apply your glaze. If you add it too early, the sugars may burn or wash off into the poaching liquid. Brush the glaze generously over the top and between the slices if using a spiral-cut ham. Close the lid and let it caramelize.
Tips for Avoiding Common Mistakes
Even with a slow cooker, things can go wrong if you aren’t careful.
Do Not Overcook
The most common mistake is leaving the ham in the pot for too long. Once it hits 140°F, switch the crock pot to the “Warm” setting. If you leave it on “Low” for several hours past its peak, the meat will eventually begin to break down and lose its texture.
Keep the Lid Closed
Every time you lift the lid to peek at the ham, you release the trapped steam and heat. This can add 15 to 20 minutes to your total cooking time. Only open the lid when it is time to glaze or check the internal temperature with a meat thermometer.
Managing Saltiness
Hams are naturally very salty. If you are concerned about the sodium levels, using a sweeter liquid like pineapple juice or a brown sugar glaze can help balance the palate.
Serving and Storage
Once the ham has reached the desired temperature, remove it carefully from the crock pot. It will be very tender, so use sturdy tongs or a large carving fork.
Resting the Meat
Let the ham rest on a carving board for about 15 to 20 minutes before slicing. This allows the juices to redistribute through the meat, ensuring that every bite is moist. If you slice it immediately, the juices will run out onto the board, leaving the meat dry.
Utilizing Leftovers
One of the best parts of heating a ham in a crock pot is the leftover potential. The bone can be saved to make a rich stock for split pea soup or ham and bean stew. The meat itself stays moist enough to be used in sandwiches, omelets, or diced into a breakfast hash the next morning.
Frequently Asked Questions
Can I put a frozen ham directly into the crock pot?
It is not recommended to put a completely frozen ham into a slow cooker. The meat will spend too much time in the “danger zone” (between 40°F and 140°F) where bacteria can grow rapidly. It is best to thaw the ham in the refrigerator for 24 to 48 hours before reheating.
What if my ham is too big for the lid to close?
If the ham sticks out of the top, you can use a double layer of heavy-duty aluminum foil to create a dome over the crock pot. Wrap it tightly around the rim of the slow cooker to ensure the steam is sealed in. This works just as well as the original lid.
Do I need to add water if the ham is already juicy?
Yes, you should always add at least a small amount of liquid. The direct heat from the bottom of the ceramic insert can scorch the meat before the internal temperature rises. Adding a cup of juice or broth provides a buffer and creates the steam necessary for even heating.
How do I know when the ham is done?
The most reliable method is using a digital meat thermometer. Insert the probe into the thickest part of the ham, making sure not to touch the bone. Once the thermometer reads 140°F, the ham is safely reheated and ready to be served.
Can I cook raw ham in a crock pot?
While most hams sold in grocery stores are “ready to eat” or “city hams,” if you have a raw “country ham,” it requires a completely different process, including soaking to remove salt and a much longer cooking time. This slow cooker reheating method is specifically designed for fully cooked, smoked, or spiral-sliced hams.