
There are several ways to heat pre-cooked ham in a crock pot, but it's important to note that the USDA cautions against heating up leftovers in a slow cooker because of the risk of bacterial growth. If you're set on using a crock pot, it's recommended that you first heat the ham on a stove, in a microwave, or in an oven, until it reaches at least 165°F, and then place it in the crock pot to keep it warm. To avoid the ham drying out, it's best to cook it on a low setting for 4-6 hours, depending on the weight of the joint. You can also add liquids like ginger ale, root beer, or pineapple juice, and spices like cloves, cinnamon, and nutmeg to infuse the ham with flavour and create a sweet glaze.
| Characteristics | Values |
|---|---|
| Ideal for | Holiday dinners |
| Preparation time | 30 minutes |
| Cooking time | 2.5-6 hours |
| Temperature | Above 140 °F |
| Ingredients | Ham, ginger ale, brown sugar, root beer, pineapple juice, maple syrup, Dijon, balsamic vinegar, honey |
| Equipment | Slow cooker, crock pot, oven, skillet, microwave, stove |
| Caution | Do not overcook, as this will lead to dry ham |
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What You'll Learn

Recommended alternatives to using a crock pot
If you don't want to use a crock pot to heat your pre-cooked ham, there are several alternative methods you can try:
Oven
One option is to use your oven. If your ham has already been sliced, you can place the slices directly in the oven to reheat them. This method is also suitable if you have a larger ham, as it will heat through more quickly than in a crock pot. For best results, reheat your ham slices in the oven and then transfer them to the crock pot to keep warm. Alternatively, place your ham in a pan and allow it to cool before refrigerating. Then, on the day you want to serve it, simply reheat the ham in the same pan in the oven. This saves you from having to wash multiple pans!
Broiler
If you want to glaze your ham, you can mix your chosen ingredients and pour them over the ham before finishing it off under the broiler for 5-7 minutes. Keep a close eye on the ham to prevent burning or overheating.
Skillet
If your ham has already been sliced or cut into chunks, you can reheat it in a skillet. For slices or steaks, cook until slightly browned on both sides. For ham chunks, you can either warm them in the skillet or simply add them directly to soups, omelets, or other recipes without reheating.
Pressure cooker
If you're short on time and don't want to wait for a slow cooker, a pressure cooker is a great alternative for reheating your precooked ham.
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How to prepare the ham
Preparing ham in a crock pot is simple and fuss-free. However, it is important to note that the USDA cautions against heating up leftovers in a slow cooker, as cold meat can spend too much time heating up, giving bacteria a chance to multiply. Therefore, it is recommended that you reheat the ham using another method until it reaches at least 165 °F (74 °C), and then place it in the slow cooker to keep it warm.
To prepare the ham, start by removing it from its packaging and discarding any flavoring packets. If using a bone-in ham, check for a plastic cap on the end of the bone and discard it. You may also want to trim the ham to make it fit in your crock pot. Place the ham in the crock pot cut-side down. If desired, you can rub the ham with brown sugar, spices, or a glaze before cooking.
To cook the ham, pour a liquid such as ginger ale, root beer, or pineapple juice into the crock pot. You can also add spices like cloves, cinnamon, and nutmeg for additional flavor. Cover the crock pot with its lid or foil and cook on low for 2 to 6 hours, depending on the size of the ham. Smaller hams may only need 2 to 3 hours, while larger hams may take up to 6 hours. The ham is ready when it reaches an internal temperature of at least 165 °F (74 °C).
Once the ham is heated through, you can remove it from the crock pot and place it on a platter. If desired, you can skim the fat and strain the juices from the crock pot, bringing them to a simmer in a saucepan before pouring them over the ham. Let the ham rest for 15 to 20 minutes before carving it into slices.
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Cooking time and temperature
The cooking time and temperature for heating pre-cooked ham in a crock pot depend on the weight of the ham. As a rule of thumb, an eight- to ten-pound pre-cooked ham will take about four to six hours on low heat in a slow cooker. A smaller ham, weighing four to six pounds, may only need two to three hours on low heat. A three-pound ham will likely be done in two and a half to three hours.
To ensure that the ham is heated thoroughly, it should reach an internal temperature of 140 °F. FoodSafety.gov recommends that the ham's internal temperature should reach at least 165 °F to be considered safe to eat.
It is important to note that the USDA cautions against heating up any type of meat in a Crock-Pot because of the risk of bacterial growth. Temperatures above 40 °F and below 140 °F are considered a danger zone for bacterial growth, which can cause foodborne illnesses.
To avoid this, it is recommended to heat the ham using another method, such as a stove, oven, or microwave, until it reaches the safe internal temperature of 165 °F, and then place it in the slow cooker to keep it warm, set to a temperature above 140 °F.
If you choose to heat the ham in the crock pot, it is important to keep the ham moist by adding a liquid such as ginger ale, pineapple juice, or water, and to cook it on low heat to prevent it from drying out.
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Glazing the ham
Glazing your ham will give it a sweet or savory flavor. You can make your glaze by mixing a few simple ingredients together. For example, you can whisk together brown sugar, Dijon mustard, balsamic vinegar, and honey. You can also rub the ham with brown sugar before adding it to the slow cooker, or smother it with brown sugar once it's in the crockpot. For a thicker glaze, mix a tablespoon of cornstarch and 2-3 tablespoons of water.
If you want to give your ham a stronger ginger flavor, use a spicier brand of ginger beer, such as Reed's, instead of ginger ale. Or, for a ham with a sweet, maple-like glaze, try using root beer as your cooking liquid, along with a brown sugar rub.
Once your glaze is prepared, remove the lid from the slow cooker and evenly pour the glaze over the ham. You can use a basting brush to ensure every part of the ham is coated. Cover and cook on low for an additional 30 minutes.
After cooking, place the ham under the broiler for five to seven minutes to caramelize the glaze. Keep a close eye on the ham to prevent burning or overheating. Alternatively, place the ham in an oven heated to 425 °F (218 °C) for eight minutes.
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Resting the ham
Firstly, remove the ham from the crock pot and place it on a large carving board or platter. Tent the ham with foil to keep it warm and let it rest for 15 to 20 minutes. This will ensure the meat stays moist and allow the juices to be reabsorbed.
If you have cooked your ham with a glaze, you may want to place it under the broiler for five to seven minutes to caramelize the glaze. Keep a close eye on the ham to prevent burning or overheating. Alternatively, place the ham in an oven heated to 425 °F (218 °C) for eight minutes.
If you have cooked your ham in slices, you may want to use a skillet to reheat it, browning each side. You can also simmer the slices in a cup of water for two minutes to remove some of the saltiness.
If you have cooked your ham whole, you can slice it after it has rested. Using an electric carving knife, cut the ham into even slices and arrange them on a platter.
Remember, it is important to keep your ham above 140 °F (60 °C) to prevent bacteria from multiplying.
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Frequently asked questions
It depends on the weight of the ham. An eight to ten-pound pre-cooked ham will take about four to six hours on low heat. Smaller hams weighing four to six pounds may only need two to three hours on low heat.
The ham should reach an internal temperature of at least 140°F to 165°F to be considered safe to eat.
You can add a liquid such as ginger ale, root beer, pineapple juice, or water to keep the ham moist. You can also add spices like cloves, cinnamon, and nutmeg for additional flavour.
If your ham is bone-in, check the end of the bone for a plastic cap and discard it if present. You can also rub the outside of the ham with brown sugar for extra sweetness.
The slow cooker method is not ideal for heating sliced ham. Instead, use a skillet or the microwave to reheat sliced ham.











































