Slow Roasted Prime Rib Roast

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Slow Roasted Prime Rib Roast

Slow roasted prime rib roast cooked to a perfect medium-rare. With simple seasonings of salt, pepper, fresh garlic, and Penzeys English Prime Rib Rub. This is all you need to make this a perfect feast for your family and friends.

Slow Roasted Prime Rib Roast Recipe

Oh, and of course you need to start with a nice prime rib roast.  I started with this 5.5-pound boneless prime rib roast. Prime rib is a very expensive cut of meat. Many people tell me that they don't attempt making prime rib roast in fear of ruining it. 

I'm here to tell you that making this is so easy, and you'll be so happy with the results. Once your family and friends taste this prime rib you'll be a hero.

I used 3 cloves of fresh garlic cut in half. I made six small cuts on both sides of the top and stuffed the garlic in. Then I seasoned the roast with salt, pepper, and Penzeys English Prime Rib Rub.

Slow Roast Prime Rib Roast

I  left the prime rib out for a couple of hours to reach room temperature.  I inserted the probe of my ThermoPro TP-20 Thermometer. Then, placed it in the oven at 275 degrees until the internal temperature was 125 degrees, about 2.5 hours.

Out of the oven, I covered the roast to let it rest for 30 minutes before cutting. While resting the roast will continue to cook to 130 degrees, a perfect medium-rare. The outside was a nice dark tasty crust while the inside was a perfect medium-rare. 

The rule of thumb is about 15 minutes per pound. If you don't have a probe to monitor the internal temperature, use an instant-read thermometer and check the internal temperature after 2 hours.

As always thanks for stopping by and I hope you enjoy it.


6 comments:

  1. Well, honestly, my one attempt at cooking prime rib at home was not my best cooking adventure. I overcooked it and dried it out. I really want to blame the pan I used, but that would just be wrong. The first time I took it out of the oven, it was probably perfect, but I thought it was too rare and put in back in for another 45 min. You laugh, but I was heartbroken. That roast costs $45 and I ruined it for all of us. I love prime rib, but it is probably best to buy it out where my husband can get his medium rare and I can get my medium well.

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    1. I would go with that Cynthia, blame the pan! Prime rib is really expensive, the one I did cost us $61.00. But it did come to a perfect medium rare. If ever try it again make it medium rare. Take a medium rare slice and cook it in a pan with butter on the stove top for about 2 or 3 minutes per side and you'll have yours medium well.

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  2. I have never attempted to cook prime rib for exactly the reason you state above, Sam - fear of ruining it. But your recipe sounds very simple. When I save up enough money (LOL), I'll give it a try. As you know, we did your pork tenderloin on the grill recipe awhile ago and it was Delicious! So I am sure this recipe is just as good. Or, you could let me know the next time your are roasting prime rib and I'll be over for dinner. LOL. Love your recipes, Sam.

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    1. Well, you are certainly welcome anytime Pat. I think the thermometer is the key to monitor the internal Temp. Or, at least the instant read one. Thanks so much for those kind words. And, for sure you need to save up some money for Prime Rib!!

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  3. I never cooked prime rib because I don't like it but I am sharing this post because most people I know would love it. Thank you

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    1. Thanks so much, Carol, I hope your friends enjoy this one :)

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