WebSteps to Make It. Gather the ingredients. The Spruce / Cara Cormack. The night before cooking the prime rib, unwrap the roast and let it sit uncovered in the refrigerator. This will dry out the surface, making it …
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Prime Rib: The Basics
For cooking instructions for prime rib roast that is boneless the basic cooking time is for medium is a 3 to 4 pound prime rib roast should be cooked at 350 degrees Fahrenheit for 23 to 30 minutes per pound, for a 4 to 6 pound prime rib roast you should cook it at 350 degrees Fahrenheit for 18 to 20 minutes per pound.
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