How to Bake Corned Beef in a Roasting Oven

Corned beef responds best to long slow baking with some moisture. It retains its pink color when cooking, so the best way to judge doneness is with a thermometer. Your corned beef roast will be done when the internal temperature reaches 145 degrees Fahrenheit, measured with a thermometer inserted into the thickest part of the roast.

Rinse off the seasonings that come on the corned beef. Corned beef has a distinct flavor and often no other seasonings than onion and vegetables are needed. Use a roaster oven for cooking a whole corned beef roast, which can weigh from 8 to 12 lbs.

Step 1

Trim off most of the surface fat off the brisket with a sharp knife. Rinse the meat and pat it dry with paper towels. Allow the roast to sit for 30 minutes on the counter to come to room temperature.

Step 2

Preheat the roaster for 10 to 15 minutes at 250 degrees Fahrenheit.

Step 3

Place the roast in the roaster pan that fits into the electric roaster. Add the liquid, such as water, apple juice or cider, or a dark beer.

Step 4

Put the roasting pan in the roaster, and put on the lid.

Step 5

Test the temperature of the corned beef after 4 hours. Once it has reached about 140 degrees Fahrenheit, put the cabbage, potatoes, onions, carrots and rutabaga around the roast. Put the lid back on, and let the roast bake for another hour.

Step 6

Remove the corned beef from the roaster, and put it on a platter. Cover it loosely with foil and let it sit for 15 minutes before slicing.

Step 7

Drain the vegetables and serve them beside the sliced corned beef, or serve them as a soup with the broth from the roast.

Things You'll Need

  • 8-lb. corned beef brisket

  • Paper towels

  • Electric roaster

  • 2 cups water, apple juice or apple cider, dark beer

  • Instant-read thermometer

  • 1/2 cabbage cut in wedges

  • 8 small potatoes, quartered

  • 2 small onions, quartered

  • 4 large carrots, cut into 1-inch pieces

  • 2 medium rutabaga, peeled and quartered

  • Serving platter

  • Foil


Use the leftover corned beef for sandwiches with coleslaw. Reheat leftover vegetables in some of the broth from the roaster.


A smaller roast may not need to cook as long. Check the temperature after 2 hours for a roast under 4 lbs.

references & resources
Load Comments

Copyright © 2019 Leaf Group Ltd. Use of this web site constitutes acceptance of the LIVESTRONG.COM Terms of Use , Privacy Policy and Copyright Policy . The material appearing on LIVESTRONG.COM is for educational use only. It should not be used as a substitute for professional medical advice, diagnosis or treatment. LIVESTRONG is a registered trademark of the LIVESTRONG Foundation. The LIVESTRONG Foundation and LIVESTRONG.COM do not endorse any of the products or services that are advertised on the web site. Moreover, we do not select every advertiser or advertisement that appears on the web site-many of the advertisements are served by third party advertising companies.