A full rack of prime beef is 7 ribs, which will easily serve 14 to 16 people (or more!). A full rack will not fit in my oven, so when I’m feeding a crowd, I cut the roast in half (3 ribs on one roast and 4 ribs on the other) and cook them in separate ovens.
Perfect Prime Rib
1 prime rib roast with or without bone (any size)
Preheat oven to 550F degrees.
Make a rub of salt, pepper and garlic powder and apply to meat. Place meat in a shallow roasting pan fat side up.
Roast at 550 at 5 minutes per pound for RARE, or 6 minutes per pound for MEDIUM and 7 minutes per pound for WELL DONE.
Turn off oven at the end of cooking time and DO NOT OPEN OVEN DOOR
FOR TWO HOURS.
At the end of the 2 hours, remove meat from oven to slice; it comes out perfect everytime.
Works the same with Roast beef. Try it you won’t be disappointed.