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1 While the roast is resting prepare the au jus; place the roasting pan on top of the stove over high heat. 2  Add in the wine; cook for 8-10 minutes, stirring and scraping any brown bits. 3  Add in the beef stock; cook and reduce the juice by half (this might take about 20 minutes). 4  Add salt and pepper to taste. Set oven to 450Â°F and allow the oven to preheat for a minimum of 15 minutes. 2  Season the roast with only a small amount of salt but lots of fresh ground black pepper pepper (that's all nothing else but a little salt and fresh ground black pepper, using any other spices will take away the flavor from the prime rib!).
Serves 4 to 8 people depending on the size of the roast. Note: For medium-rare prime rib, we want to take the roast out of the oven at 120Â°F, and it will continue cooking until it reaches 130Â°F. If you prefer a medium prime rib, take it out at 130Â°F with a target temperature of around 140Â°. Roast for 20 minutes, then lower the heat to 325Â°F and roast until the meat's internal temperature reaches 120Â°F, which will be another hour to three and a half hours, depending on the size of your roast.