Things You'll Need:
- Preseasoned Prime rib
- Heavy roasting pan
- Meat thermometer
- Aluminum foil
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Step 1
Allow the prime rib to reach room temperature. Take a thawed prime rib and let it sit out for 2 hours.
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Step 2
Preheat oven to 450 degrees F.
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Step 3
Place prime rib into a heavy roasting pan. Place pan into oven for 15 minutes.
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Step 4
Reduce heat to 325 degrees F. Cook for 15 minutes per pound of prime rib to achieve medium rare. This is a guideline that can change depending on your stove, elevation and how done you would like your meat.
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Step 5
Check the temperature to verify how well it is cooked. Stick the meat thermometer into the prime rib. A rare prime rib should be between 120 and 125 degrees F; a medium rare is 130 to 135 degrees F; a medium is 140 to 145 degrees F; a medium well is 150 to 155 degrees F and well done is 160 degrees F.
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Step 6
Pull out the prime rib about 15 minutes or 10 degrees prior to the required cooking time. If you are cooking to medium rare then pull it out at about 120 degrees F.
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Step 7
Wrap the prime rib in aluminum foil and let it sit for 20 to 30 minutes. This allows the juices to permeate into the meat.
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Step 8
Cut and serve with your favorite side dish.
