The spiral-cut ham is a centerpiece staple for holidays, Sunday dinners, and celebratory gatherings. While these hams come pre-sliced and usually pre-cooked, the real challenge lies in reheating them without turning the meat into a dry, leathery mess. The slow cooker is arguably the best tool for this job. It traps moisture, allows flavors to meld, and frees up your oven for side dishes. Understanding exactly how long to slow cook a spiral ham is the secret to serving a meal that is tender, juicy, and infused with flavor.
Why the Slow Cooker is the Best Method for Spiral Ham
Most spiral hams purchased at the grocery store are city hams, meaning they have been cured and smoked. Because they are already cooked, your goal in the kitchen is simply to bring the meat up to a safe and appetizing serving temperature. The “low and slow” environment of a crockpot prevents the edges of the delicate spiral slices from curling and drying out, which often happens in a traditional oven.
Using a slow cooker also allows you to bathe the ham in a liquid base, such as apple juice, pineapple juice, or even a splash of ginger ale. This steam-infuses the meat from the inside out. Since spiral hams are sliced all the way to the bone, these liquids can penetrate deep into the meat, ensuring every bite is as flavorful as the first.
Determining How Long to Slow Cook a Spiral Ham
The time required depends largely on the weight of the ham and the heat setting of your slow cooker. As a general rule of thumb, you should aim for a total time that allows the internal temperature to reach 140 degrees Fahrenheit, which is the USDA-recommended temperature for reheating pre-cooked ham.
Low Heat Setting
Cooking on low is the preferred method for maintaining the best texture. On the low setting, a spiral ham typically takes 4 to 6 hours. This breaks down to approximately 20 to 30 minutes per pound. If you have an 8-pound ham, you are looking at a window of roughly 4 hours. If your ham is closer to 10 or 12 pounds, it may need the full 6 hours.
High Heat Setting
If you are short on time, you can use the high setting, but you must be more vigilant. On high, a spiral ham usually takes 2 to 3 hours. Cooking on high increases the risk of the sugar in your glaze burning or the outer slices becoming tough. It is generally recommended to stick to the low setting unless you are in a significant time crunch.
Factors That Influence Cooking Time
While the weight-per-minute calculation is a great starting point, several variables can shift your timeline.
Size and Shape of the Ham
A wide, flat ham will heat more quickly than a tall, narrow one. Additionally, the size of your slow cooker matters. If the ham is touching the sides of the ceramic pot, those areas will cook faster. If your ham is too large for the lid to close properly, you can create a “foil tent” over the top to seal in the heat, but keep in mind that this might add 30 to 60 minutes to your total time due to heat loss.
Starting Temperature
If you take the ham directly from the back of a very cold refrigerator and put it straight into the slow cooker, it will take longer to reach the target temperature. It is helpful to let the ham sit on the counter for about 30 minutes to take the chill off before starting the process, though this is not strictly necessary if you adjust your cooking time.
The Amount of Liquid
Adding liquid to the bottom of the pot creates a poaching effect. More liquid can sometimes speed up the heat transfer, but too much liquid can dilute the natural flavors of the ham. Aim for about 1/2 cup to 1 cup of liquid at the bottom of the slow cooker.
Step-by-Step Instructions for the Perfect Slow Cooker Ham
To ensure your ham is a success, follow a consistent process that prioritizes moisture retention.
Preparation and Placement
Start by removing all packaging, including the plastic disc often found on the bone end. Place the ham in the slow cooker with the flat, cut side facing down. This position helps keep the juices inside the slices rather than letting them run out. If your ham is too large to sit flat, you may need to trim a small portion off the side to make it fit, or simply lean it at an angle.
Adding the Glaze
Most spiral hams come with a glaze packet, but making your own is simple and far superior in flavor. A classic mixture of brown sugar, honey, Dijon mustard, and warm spices like cloves or cinnamon works beautifully. Rub about two-thirds of the glaze over the ham and between the slices at the beginning of the cooking process. Save the remaining third for the final 30 minutes of cooking to give the exterior a fresh, tacky finish.
Monitoring the Internal Temperature
The only way to be 100 percent sure your ham is ready is to use a meat thermometer. Insert the probe into the thickest part of the meat, making sure not to touch the bone, as the bone conducts heat differently and will give an inaccurate reading. Once the thermometer reads 140 degrees Fahrenheit, the ham is ready to be removed.
Tips for Avoiding Dry Ham
The most common complaint with spiral hams is dryness. Because the meat is already sliced, there is more surface area for moisture to escape.
- First, never cook the ham without some form of liquid in the pot. Whether it’s water, cider, or broth, that moisture is vital.
- Second, resist the urge to peek. Every time you lift the lid of a slow cooker, you release a significant amount of heat and steam, which can add 15 to 20 minutes to the cooking time and dry out the air inside the pot.
- Finally, once the ham reaches 140 degrees Fahrenheit, turn the slow cooker to the “warm” setting immediately or remove the ham entirely. Leaving it on “low” after it is finished will result in a mealy texture.
Serving and Leftovers
Once the ham is done, let it rest for about 10 to 15 minutes before serving. This allows the juices to redistribute so they don’t all run out the moment you move the ham to a platter. Since the ham is already sliced, serving is as easy as running a knife around the center bone to release the pieces.
Leftover slow-cooked ham is a gift that keeps on giving. It can be stored in the refrigerator for 3 to 5 days or frozen for up to 2 months. The bone should always be saved to make pea soup, lentil stew, or ham congee. The slow cooking process actually helps season the bone, making it an excellent base for future stocks.
Frequently Asked Questions
Can I put a frozen spiral ham in the slow cooker?
It is not recommended to put a completely frozen ham in the slow cooker. Because slow cookers heat up gradually, a large frozen ham may stay in the “danger zone” (between 40 degrees Fahrenheit and 140 degrees Fahrenheit) for too long, allowing bacteria to grow. It is best to thaw the ham completely in the refrigerator for 24 to 48 hours before slow cooking.
What if my ham is too big for the slow cooker lid to close?
This is a common issue with larger hams. You can resolve this by covering the top of the slow cooker tightly with a double layer of heavy-duty aluminum foil. Shape the foil into a dome to create a seal around the edges of the crock, then place the lid on top of the foil if possible to help weigh it down. This mimics the sealed environment of the lid.
Do I need to add water to the slow cooker?
You should add at least some liquid to prevent the bottom of the ham from scorching and to create steam. While water works, using flavorful liquids like apple juice, pineapple juice, orange juice, or even a maple syrup and water mixture will enhance the final taste of the meat.
How do I get a crispy crust on a slow cooker ham?
A slow cooker will not produce a crispy, caramelized crust because of the moist heat. If you prefer a crunchy exterior, remove the ham from the slow cooker once it reaches 135 degrees Fahrenheit. Place it on a baking sheet, brush on an extra layer of glaze, and broil it in the oven for 3 to 5 minutes until the sugar bubbles and browns.
Can I overcook ham in a slow cooker?
Yes, you can absolutely overcook it. Even though the slow cooker is gentle, leaving a spiral ham in for 8 or 10 hours will cause the fibers to break down too much, resulting in meat that is mushy or “shreddy” rather than firm and succulent. Always use a timer and check the internal temperature starting at the 3-hour mark for smaller hams or the 4-hour mark for larger ones.