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Rock Salt Encrusted Prime Rib

Rated as 4.77 out of 5 Stars

"This is one of the absolute best ways to taste what a real prime rib tastes like, and it's NOT like plain old roast beef!! This method also makes an extremely cool presentation that fascinates people with its looks. A big plus is that this method makes it easier to remove the rock salt from your roast. The only drawback I've found is that you can't really use the drippings for au jus or gravy because it's way too salty, so make that separately. Enjoy!"
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4 h 35 m servings
Original recipe yields 15 servings


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  1. Preheat oven to 450 degrees F (230 degrees C).
  2. Rinse the roast and pat dry with paper towels. Mix the onion soup mix and pepper together in a small bowl. Rub the pepper mixture generously over all sides of the roast. Place the roast on a clean, dry baking sheet, and rest 30 to 45 minutes.
  3. Meanwhile, mix the rock salt, flour, rosemary together in a bowl. Gradually pour in the water and mix by hand (wear gloves if desired) to make a thick, sticky batter or paste. Add more water if necessary. Spread the salt batter into the bottom of a roasting pan to make a layer 1/2 to 3/4 inch thick., reserving 1 to 2 cups. Place the roast, bones facing down, in the middle of the batter in the pan. Pull the batter up and around the roast to completely cover the meat. Pat on extra batter if necessary. Insert meat thermometer into the roast with its gauge positioned to be visible from the front of the oven (or use a regular meat thermometer).
  4. Cook in preheated oven for 15 to 20 minutes. Remove, and use remaining salt batter to patch any holes or breaks in the coating.
  5. Meanwhile, prepare au jus according to package directions leaving out 1/4 cup water to boost flavor, and keep warm.
  6. Return roast to the oven, and cook until internal temperature reaches 130 degrees F (54 degrees C), or to desired doneness. Remove roast, and rest 20 to 30 minutes until internal temperature reaches 140 degrees F (60 degrees C). Chip off the crust and discard and then slice to serve. Serve garnished with horseradish and au jus.


  • Partner Tip
  • Reynolds® Aluminum foil can be used to keep food moist, cook it evenly, and make clean-up easier.

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  1. 90 Ratings

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Most helpful positive review

I was very determine to find the BEST prime rib recipe and I found it. I've tried many prime rib recipes and this is by far THE BEST. I used 5 1/2 pounds and it asked for 2 1/2 cups of Rock Sal...

Most helpful critical review

While the rock salt kept the beef moist, it was very hard to remove (you need a hammer) and spots of the prime rib were really salty! Won't do it again.

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I was very determine to find the BEST prime rib recipe and I found it. I've tried many prime rib recipes and this is by far THE BEST. I used 5 1/2 pounds and it asked for 2 1/2 cups of Rock Sal...

This turned out awesome! The only thing I did wrong (was not thinking at all) was that I used my clay pot. Not a good idea. I would not only recommend, but insist on using a disposable pan to ...

I have been making prime rib for several years but this is now my favorite recipe. Be brave and try was well worth it! I did use kosher salt instead of rock salt. It worked fine. I al...

This recipe is the greatest! I have always cooked Prime Rib for Christmas. and this is the BEST. I did have to modify-ingred. down size to 5lbs and adjusted the temp, I cooked at 450 for 30 min ...

I used this recipie for my New Year's Eve dinner and it was absolutely fabulous! I did a 7lb prime rib roast, roasted it first for 30 min, then cooked it for an additional 1 hr 40 min, rest for ...

This was the most awesomely delicous prime rib I have ever tasted and what is even more thrilling is the fact that I was able to make it! The only different thing I did was instead of a 20 lb P...

This was the best prime rib I have ever cooked. I have always used rock salt to cook a prime rib, but it doesn't stick to the meat. This year, I used the recipe listed here for the rock salt c...

I made this for New Years and it turned out perfect!

Only way to cook a prime rib! My husband’s idea to fix this Christmas Day – wanted something rather than turkey. OH WOW it was fabulous. Seasoned the outside of the prime rib with rosemary, gar...