How To Cook A Ham In A Roaster
Roaster ovens offer a convenient middle ground between oven space and slow-cooker convenience when preparing a large ham. If you want to learn how to cook a ham in a roaster, you are in the right place. This method frees up your main oven for side dishes and keeps the meat incredibly moist.
A roaster works well for both fully cooked and spiral-cut hams. It traps steam and heat efficiently. You just need to manage the temperature and the glaze. Here is the complete guide.
Why Use A Roaster Oven For Ham?
A roaster oven is essentially a large electric pot with a lid. It creates a moist, even cooking environment. This is perfect for ham, which can dry out easily in a standard oven.
Using a roaster also saves space. You can cook a 10-pound ham without monopolizing your kitchen’s main oven. The cleanup is usually easier too, since the insert pan is removable.
- Moisture retention: The lid traps steam, preventing the ham from drying out.
- Energy efficiency: Roasters use less power than a full-size oven.
- Portability: You can plug it in anywhere, even on a porch or in a garage.
- Consistent heat: Most models hold a steady temperature well.
How To Cook A Ham In A Roaster
Follow these steps for a tender, flavorful ham every time. The process varies slightly depending on whether your ham is fully cooked or needs to be cooked through. Most hams sold in stores are fully cooked and just need reheating.
Step 1: Choose The Right Ham
You will find two main types at the store. A “fully cooked” ham is ready to eat cold but tastes better heated. A “cook before eating” ham requires a longer cooking time to reach a safe internal temperature.
For this method, a fully cooked spiral-cut or semi-boneless ham works best. Aim for a ham that fits inside your roaster with at least an inch of space around the sides.
Step 2: Prepare The Roaster And Ham
Place the ham flat-side down in the roaster insert. If your ham has a rind, you can trim it off before cooking. Some people like to score the fat in a diamond pattern to help the glaze stick later.
Add liquid to the bottom of the pan. This creates steam. Use about one cup of water, broth, or apple juice. Do not pour liquid over the ham itself, or you will wash away the glaze later.
Step 3: Set The Temperature And Time
Preheat your roaster to 325°F (163°C). This is the standard temperature for reheating ham. Cooking at a higher heat can make the outside tough before the inside is warm.
Use this timing guide for fully cooked hams:
- 5 to 7 pounds: 1.5 to 2 hours
- 8 to 10 pounds: 2 to 2.5 hours
- 11 to 15 pounds: 2.5 to 3 hours
For a “cook before eating” ham, you need to cook it until the internal temperature reaches 145°F. This usually takes about 20 minutes per pound at 325°F.
Step 4: Cover And Cook
Put the lid on the roaster. The lid keeps the heat inside and traps moisture. Do not open the lid often. Every time you open it, you lose heat and add cooking time.
Check the ham after the minimum time has passed. Insert a meat thermometer into the thickest part, avoiding the bone. The ham is done when it reaches 140°F for fully cooked ham or 145°F for raw ham.
Step 5: Apply The Glaze
Glazing is optional but adds great flavor. Wait until the ham is almost done before glazing. If you glaze too early, the sugars will burn.
During the last 20 to 30 minutes of cooking, brush your glaze over the ham. You can use a honey-mustard mix, brown sugar and pineapple juice, or a maple syrup glaze.
Leave the lid off for the final 10 minutes. This allows the glaze to caramelize and thicken. Watch it closely so it does not burn.
Step 6: Rest And Serve
Turn off the roaster and remove the ham. Place it on a cutting board or platter. Cover it loosely with foil.
Let the ham rest for 15 to 20 minutes. This allows the juices to redistribute. If you cut it immediately, the juices will run out and the meat will be dry.
Slice against the grain. For spiral-cut hams, just pull the slices apart with a fork.
Tips For Perfect Roaster Ham
These small details make a big difference in the final result.
- Do not overcook: Ham dries out quickly. Use a thermometer, not just a clock.
- Add aromatics: Toss cloves, cinnamon sticks, or bay leaves into the liquid for extra aroma.
- Save the drippings: The liquid at the bottom makes a great base for gravy or soup.
- Check your roaster size: A 16-quart roaster fits a 12-pound ham comfortably.
- Keep it warm: After resting, you can set the roaster to “warm” and return the sliced ham to the pan for serving.
Common Mistakes To Avoid
Even experienced cooks make these errors. Avoid them for the best results.
- Cooking at too high a heat. 325°F is ideal. Higher heat makes the outside tough.
- Not adding liquid. The roaster needs moisture to create steam. Dry heat will dry out the ham.
- Glazing too soon. Sugar burns fast. Add glaze only in the last half hour.
- Skipping the rest. Resting is not optional. It keeps the meat juicy.
- Using a frozen ham. Always thaw your ham in the fridge for 24 to 48 hours before cooking.
Frequently Asked Questions
Can I Put A Frozen Ham In A Roaster?
No. A frozen ham will cook unevenly and take much longer. Always thaw it in the refrigerator first. A large ham needs about 5 hours per pound to thaw safely.
How Much Liquid Should I Use?
Use one cup of liquid for a small ham (under 8 pounds) and two cups for a larger ham. The liquid should not touch the bottom of the ham if possible. It is just there to create steam.
Do I Need To Baste The Ham?
No, basting is not necessary. Opening the lid lets out heat and moisture. If you want to add flavor, glaze it near the end of cooking instead.
How Do I Know When The Ham Is Done?
Use a meat thermometer. For fully cooked ham, reheat to 140°F. For raw ham, cook to 145°F. The color will not tell you if it is safe to eat.
Cooking a ham in a roaster is simple once you know the timing and temperature. Keep the heat low, add a little liquid, and let the covered roaster do the work. Your ham will come out tender, warm, and ready for the table.