Recipe(tried): Prime Rib Roast

We usually have this every Christmas with Yorkshire Pudding. My MIL always used this formula for a rare rib roast. This is for a roast with the ribs, not a boneless roast. To figure out the total cooking time, multiply the number of lbs of roast (including figuring out fractions of lbs.) by 18 min. (20 min. for medium rare) Season your roast all over with salt and pepper. There is no need for a roasting rack since the ribs form a natural rack for the roast. Put it in a roasting pan (ribs down to form a rack) and bake it for 1/2 hour at 450 degrees F. (This browns it nicely all over). Subtract this 1/2 hour from the total cooking time. Lower the heat to 350 degrees F for the remainder of the baking time. Make sure that your roast is at room temperature when you start baking it. It is always good to double check with a meat thermometer so you don't over cook the roast for your taste but this has always worked really well for me. Good luck with your roast!