Prime rib is wonderful to cook for a special get-together with mashed potatoes and gravy but many people aren't used to cooking it. When it comes to any kind of roast, a low and slow cooking method is ideal. Here is information about how to cook prime rib at 250 F.

What Exactly is Prime Rib?
Prime rib is a classic roast from the beef rib primal cut, including ribs 6 to 10. This area, also where ribeye steak cuts come from, is well-marbled, and utterly delicious.
The word "prime" is a legal designation that refers to the fact that the beef has been graded prime by the USDA.
When you buy prime rib, try to ask the butcher to cut the roast from the loin end of the rib section (also known as the “first cut”). Usually, the loin end is a bit less fatty (though, still well-marbled) and more tender.
Why is Prime Rib So Expensive?
Prime rib costs about $17 a pound while choice-grade prime rib goes for about $13 a pound. The prime rib is naturally higher in price because it is considered a better cut of meat.
How Long Should You Cook Prime Rib at 250 F?
In a 250 F oven, prime rib will take 3 ½ to 4 hours to cook. Then, once cooked, you should remove the roast from the oven, tent it loosely with aluminum foil, and place it in a warm spot in the kitchen to rest for at least 30 minutes.
Another Method for Cooking Prime Rib
For this method, start by preheating the oven to 500 F. Then, cook the prime rib at 500 F for 15 minutes. Then, you should lower it to 325 F and cook for 10 to 12 minutes per pound for rare prime rib, 13 to 14 minutes per pound for medium-rare prime rib, or 14 to 15 minutes per pound for medium-well prime rib. A meat thermometer is essential to ensure you cook it perfectly!

How Long Should You Smoke Prime Rib at 250 F?
To smoke prime rib at 250 F, you should smoke it for 35 to 40 minutes for a rare roast . Meanwhile, for a medium roast, you should cook it at 40 minutes per pound at 225 F. Then, you should let the roast rest for 30 minutes before serving.
Prime Rib Ingredients
- 6 to 12 pounds standing rib roast (bone-in prime rib)
- Salt, to taste
- Black pepper, to taste
- Roasted garlic horseradish cream sauce

How to Cook Prime Rib at 150 F or 250 F
- Preheat the oven to 150 F (66 C) or 250 F (121 C).
- Season the roast generously with salt and pepper, and coat it in the roasted garlic horseradish cream sauce.
- Place the roast in a roasting pan and roast it for 5 ½ to 6 ½ hours. In a 250 F oven, the roast will take 3 ½ to 4 hours.
- Use a thermometer to check the internal temperature. It should be between 125 F and 130 F when done.
- Remove the roast from the oven and tent it loosely with aluminum foil. Cover it with foil and let it rest for 30 minutes to 1 hour and a half.
- If desired, before serving the roast, preheat the oven to its maximum temperature which should be either 550 F or 600 F.
- Then, 10 minutes before serving the roast, remove the foil, place it back in the hot oven, and cook it until well browned and crisp on the exterior, about 6 to 10 minutes. Remove from the oven, carve, and serve immediately.

How Long Should You Cook Prime Rib at 250 F
Prime rib is wonderful to cook for a special get-together with mashed potatoes and gravy but many people aren’t used to cooking it. When it comes to any kind of roast, a low and slow cooking method is ideal. Here is information about how to cook prime rib at 250 F.
Ingredients
- 6 pounds standing rib roast (bone-in prime rib)
- Salt, to taste
- Black pepper, to taste
- Roasted garlic horseradish cream sauce
Instructions
- Preheat the oven to 150 F (66 C) or 250 F (121 C).
- Season the roast generously with salt and pepper, and coat it in the roasted garlic horseradish cream sauce.
- Place the roast in a roasting pan and roast it for 5 ½ to 6 ½ hours. In a 250 F oven, the roast will take 3 ½ to 4 hours.
- Use a thermometer to check the internal temperature. It should be between 125 F and 130 F when done.
- Now remove the roast from the oven and tent loosely with aluminum foil. Then Place it in the kitchen for 30Min to 1 hour and a half.
- Remove the roast from the oven and tent it loosely with aluminum foil. Cover it with foil and let it rest for 30 minutes to 1 hour and a half.
- Then, 10 minutes before serving the roast, remove the foil, place it back in the hot oven, and cook it until well browned and crisp on the exterior, about 6 to 10 minutes. Remove from the oven, carve, and serve immediately.
Notes
- If desired, before serving the roast, preheat the oven to its maximum temperature which should be either 550 F or 600 F.
- Then, 10 minutes before serving the roast, remove the foil, place it back in the hot oven, and cook it until well browned and crisp on the exterior, about 6 to 10 minutes. Remove from the oven, carve, and serve immediately.
Nutrition Information:
Yield: 6 Serving Size: 1Amount Per Serving:Calories: 1631Total Fat: 131gSaturated Fat: 53gTrans Fat: 0gUnsaturated Fat: 60gCholesterol: 399mgSodium: 701mgCarbohydrates: 4gFiber: 1gSugar: 2gProtein: 103g
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