how to roast a small prime rib roast
The internal temperature will rise to 125 degrees F. to 130 degrees F. (medium rare) in approximately 15 to 20 minutes. If allowed to rest as long as an hour, the internal temperature will rise even higher. So, pay attention to how long you let the cooked prime rib roast sit.ook until rib roast reaches an internal temperature of 120 degrees F. (or your desired temperature). Remove from oven, cover loosely with aluminum foil, and let sit approximately 15 to 20 minutes. Cutting into the meat too early will cause a significant loss of juice. Do not skip the resting stage.