Here's the prime rib recipe I use...works every time! This recipe supposedly works for any size roast. I have used it with roasts ranging in size from 4# to 8#.

1. Select a standing rib roast, well marbelized.
2. Let meat stand at room temp. for at least 1 hour before cooking.
3. Preheat oven to 375. Rub meat well with salt, sprinkle with coarse pepper...I also add some garlic to the rub. Place meat fat side up in a shallow roasting pan. DO NOT COVER. DO NOT ADD WATER.
4. Put roast in oven; cook for just ONE hour. Turn off heat BUT DO NOT OPEN OVEN DOOR AT ANY TIME UNTIL READY TO SERVE.
5. Regardless of the length of time the roast has been in the oven-30 or 40 minutes before serving, TURN ON OVEN AGAIN to 375. Cook meat for 30-40 minutes.
6. Now open oven door, remove roast to serving platter.

The meat will be very brown and crisp on the outside and pink as you carve (medium rare and very juicy).

I make this every Christmas and my family raves about it...so easy.