Prime Rib Cooking Chart. 15 minute sear 1 hour 45 minutes cook time 6 lb. 3 14 to 4 hours.
225 F to 250 F. Internal temperature on the meat thermometer should read 140ºF or 60ºC when the roast is removed from the oven. The chart below shows the temperatures of the different doneness levels of the prime rib and how it will look visually at those levels.
Rare 120 - 125F.
Prime Rib Cooking Times. Instant read thermometers are not meant to be left in the roast during the cooking. 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. 7 rows Chart for Roasting Prime Rib Standing Rib Roast This chart is only a guide.