This is my tested and proven method. I have NEVER had a bad prime rib after I started using this method!
Oven: 500 degrees
Time: 5 minutes per pound, plus 10 minutes at the end.
At the end of the time, shut the oven off. DO NOT OPEN THE DOOR!!!! Let the prime rib sit in the oven for at least 3 hours. It might smoke a little, but trust me, it is totally worth it!
I always inject a liquid seasoning into the prime rib before I put it in the oven. DO NOT put a rub or seasoning on the outside of the prime rib. It tends to make the meat dry. INJECTED LIQUID SEASONING is the way to go! USE A LOT!!!!
Also, put the rack as low as possible in the oven. Fat side up. Do not cover.
When the cooking is done,
2. Get fat
[This message has been edited by JMinow (12/22/2013)]