Most cooking instructions for prime rib roast include using a meat thermometer and this is best way to ensure that your prime rib is cooked to perfection and not overcooked. The internal temperature for rare prime beef should be 130 degrees Fahrenheit, for medium rare around 140 degrees Fahrenheit, medium around 150 degrees Fahrenheit and for well done between 160 and 170 degrees Fahrenheit.

For cooking instructions for prime rib roast that is boneless 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 and for a 8 to 10 pound prime rib roast you should cook it at 350 degrees Fahrenheit for 13 to 15 minutes per pound. Remember, this is only an estimate and all oven do not cook same. You should still use a meat thermometer to ensure desired doneness.

The last cooking instructions for prime rib roast and maybe most important is to let roast sit for around 15 minutes before carving. The roast will still cook and internal temperature will raise another 10 degrees but this sitting time is important to hold in juices and flavor.

Hans is author of Prime Roast, Steaks, Seafood Articles at Steaks-Guide.com