Hosting a holiday meal is a big task, and getting the main dish right is key. Learning how to cook a ham in roaster oven is a fantastic way to free up your traditional oven for all those side dishes. A roaster oven is a powerful tool for this job, offering even heat and plenty of space for a beautiful, juicy ham.
This guide will walk you through the entire process, from choosing the right ham to carving it perfectly. You’ll find it’s simpler than you think and yields amazing results. Let’s get started on making your holiday centerpiece.
How To Cook A Ham In Roaster Oven
Using a roaster oven for your ham has several advantages. It heats up quickly and maintains a steady temperature. This frees up your main oven for pies, casseroles, and rolls. The large capacity also means you can cook a very big ham without any trouble.
First, you need to select your ham. You’ll typically find two main types at the store: fully cooked and cook-before-eating. For a holiday meal, a fully cooked, bone-in ham is often the best choice. It’s flavorful, forgiving, and the bone adds great taste. A spiral-cut ham is another popular option because it’s easy to serve.
Make sure your roaster oven is clean and placed on a stable, heat-resistant surface. Always preheat it according to the manufacturer’s instructions before adding your ham. This ensures even cooking from the moment the ham goes in.
What You’ll Need
- A fully cooked bone-in ham (size depends on your guest list)
- Roaster oven with rack
- Aluminum foil
- Meat thermometer (this is essential)
- Carving knife and fork
- Gloves for handling hot items
- Your choice of glaze ingredients (like brown sugar, honey, mustard, or pineapple juice)
- A small brush for applying glaze
Step-by-Step Cooking Instructions
1. Preparing the Ham
Start by removing the ham from its packaging. Pat it dry with paper towels. If your ham came with a plastic cap or netting, be sure to take it off. Place the rack in the bottom of your roaster oven insert. This keeps the ham out of any drippings and allows heat to circulate.
Put the ham on the rack, flat-side down. If it has a layer of fat, you can score it in a diamond pattern with a sharp knife. This helps the glaze penetrate and gives it a nice appearance. You don’t need to add any liquid to the pan for a fully cooked ham.
2. Calculating the Cooking Time
For a fully cooked ham, you are essentially just reheating it. The general rule is to heat it for about 10-15 minutes per pound in a preheated roaster oven. Set the temperature to 275°F. This lower, slower heating prevents the ham from drying out.
Always use a meat thermometer to be certain. You want the internal temperature to reach 140°F. Insert the thermometer into the thickest part of the meat, avoiding the bone. The bone can give a false reading.
3. The Glazing Process
Glazing adds flavor and a beautiful finish. You should apply the glaze during the last 30 to 45 minutes of cooking. If you put it on too early, the sugar in most glazes can burn.
- About an hour before the ham is done, mix your glaze. A simple one is 1 cup brown sugar, 1/4 cup honey, and 2 tablespoons of mustard.
- When there’s about 45 minutes left, carefully remove the roaster oven insert. Brush a generous layer of glaze all over the ham.
- Return the ham to the oven. You can repeat this process one more time after 20 minutes for a thicker, shinier coating.
4. Resting and Carving
Once the ham reaches 140°F, take it out of the roaster oven. This is a crucial step: let the ham rest. Tent it loosely with aluminum foil and let it sit for 15-20 minutes. Resting allows the juices to redistribute throughout the meat. This means every slice will be moist and tender.
To carve a bone-in ham, place it flat-side down on your carving board. Use a sharp knife to cut thin slices perpendicular to the bone. Work your way around the bone, releasing slices as you go. For a spiral-cut ham, the work is mostly done for you—just follow the existing cuts.
Tips for a Perfect Roaster Oven Ham
- Don’t Overcook: Since the ham is already fully cooked, you are just warming it. Overheating will make it dry.
- Use the Lid: Keep the lid on your roaster oven for the entire cooking time. This traps steam and moisture, keeping the ham juicy.
- Check the Manual: Different roaster oven models can vary. It’s a good idea to consult your user manual for any specific recommendations.
- Plan for Sides: The great thing about using a roaster is that your main oven is free. You can cook your sweet potatoes, green bean casserole, and stuffing all at the same time.
Common Mistakes to Avoid
One common error is adding to much liquid to the bottom of the roaster. You don’t need broth or water for a fully cooked ham. It will create steam and can make the skin soggy instead of allowing it to caramelize nicely.
Another mistake is not using a thermometer. Guessing the doneness can lead to a cold or dry ham. Rely on the thermometer, not just the clock. Also, remember to let the ham rest. Cutting into it right away will cause all the delicious juices to run out onto the cutting board.
Finally, avoid opening the lid to often. Every time you open it, heat escapes and the cooking temperature drops. This can extend your total cooking time. Just check it once or twice near the end for glazing.
Choosing and Making a Glaze
A good glaze balances sweet, tangy, and savory flavors. Here are a few simple ideas you can try:
- Classic Brown Sugar & Mustard: Mix 1 cup brown sugar, 1/2 cup Dijon mustard, and 2 tablespoons of apple cider vinegar.
- Honey & Orange: Whisk together 3/4 cup honey, the juice and zest of one orange, and a pinch of cloves.
- Maple & Bourbon: Combine 1 cup pure maple syrup, 1/4 cup bourbon, and 1 tablespoon soy sauce. Simmer for 5 minutes to thicken slightly.
Brush these on during the last part of cooking as described earlier. The heat will caramelize the sugars and create a sticky, flavorful crust.
What to Do with Leftovers
Ham leftovers are a holiday bonus! Store leftover ham in an airtight container in the refrigerator for up to four days. You can use it in so many ways.
- Dice it for omelets or breakfast hash.
- Chop it for a hearty split pea or bean soup.
- Slice it thin for sandwiches with mustard.
- Cube it and add it to macaroni and cheese or scalloped potatoes.
You can also freeze leftover ham for longer storage. Wrap it tightly in plastic wrap and then in foil or place in a freezer bag. It should keep well for one to two months.
Cleaning Your Roaster Oven
After the feast, cleaning is the last step. Always unplug the unit and let it cool completely. The stoneware insert is usually removable and can be washed in warm, soapy water. Check if yours is dishwasher safe—many are.
Wipe down the exterior and the inside of the lid with a damp cloth. Never immerse the main heating unit in water. If there are stubborn drips in the insert, let it soak for a while to loosen them. A little baking soda paste can help with tough spots.
FAQ Section
Do I need to add water to the roaster oven when cooking a ham?
No, you do not need to add water for a fully cooked ham. The ham will release its own juices as it heats, and adding water can create to much steam, preventing a good glaze from forming.
What temperature should a roaster oven be set at for ham?
Set your roaster oven to 275°F for cooking a fully cooked ham. This low and slow method ensures it heats through evenly without drying out the exterior.
How long does it take to cook a ham in a roaster?
Plan for approximately 10-15 minutes per pound for a fully cooked ham. Always use a meat thermometer to confirm it has reached an internal temperature of 140°F.
Can I cook a raw, cook-before-eating ham in a roaster oven?
Yes, you can. The process is similar but requires a higher final internal temperature of 145°F. The cooking time may also be longer per pound. Refer to the packaging instructions for specific guidance.
Should I cover the ham with foil in the roaster?
You do not need to cover the ham with foil because the roaster oven has its own tight-fitting lid. The lid does the job of trapping moisture. You only use foil at the end, to tent the ham while it rests.
My ham is spiral-cut. Does that change the cooking time?
It can slightly, because the heat penetrates more easily. Check a spiral-cut ham about 5 minutes per pound earlier than you normally would. The glaze can also seep between the slices, which is a good thing for flavor.
Cooking your holiday ham in a roaster oven is a smart strategy that simplifies your day. It delivers a moist, flavorful centerpiece with minimal fuss. With these clear steps and tips, you can feel confident serving a beautiful ham that will impress your guests. Just remember the key points: choose a fully cooked ham, heat it slowly to 140°F, glaze it at the end, and let it rest before carving. Enjoy your meal and the compliments that are sure to come your way.