My dinner was a huge success! I'm a beginner with lots to learn and you have all been wonderful. We sliced the bones off the roast, salted liberally, and tied the ribs back on 2 days before cooking (another Serious Eats, Food Lab article - scroll down to SALT). I read that the salt will draw the moisture out at first, but then it will reabsorb the moisture along with the salt, carrying the seasoning deep within the meat. This was the only thing I did differently from a few weeks ago when I ran my trial run, and this roast was far superior. It was the same cut of meat (choice), from the same store (CostCo), and cooked the same way. So it must have been the 2 day seasoning. I let the roast sit on the counter for 2 hours, then used the Serious Eats Food Lab recipe to cook low and slow - it took 4 1/2 hours for the 11lb roast to reach 122. I did make a mistake here - instead of removing the roast from the roasting pan to sit for an hour (like I did 2 weeks ago), I simply tented the roast in the pan. I think the pan caused the roast to continue to cook. I used the same probe and oven as 2 weeks ago, so unless it went bad in that time, this has to be the reason it was overcooked. However, the flavor was fabulous, so I really have no complaints. Following the Serious Eats recipe - it did go back into the oven for 10 minutes at 500 to develop a beautiful sizzling crust. I made 2 pans of Yorkshire puddings. When everything came out of the oven and my guests were serving themselves, I popped the second pan in and proudly served a second helping to all at the table 30 minutes later. What I learned from this is the pan makes a HUGE difference! I bought a new muffin pan since I didn't have 2 and the new pan the YP's rose so high and popped right out unlike my old pan where they still looked OK, but I had to use a knife to work them out. I made my Au Jus ahead of time by making a rich stock from browning bones, oxtails, veggies for a couple of hours and them simmering them for 24 hours. I did this 2 weeks ago and froze it. Yesterday I let it simmer for another couple of hours and added any Jus from the meat before serving. I'm so glad I did this! Not only was it easier on me, but I never would have had enough Jus otherwise. Everyone took a little Au Jus cup on their plate and I put the rest into gravy boats for the table - most of which was used. I'm very proud of my dinner and I couldn't have done it without the help from all of you on this forum. :-) Thank-you! Jeri

Been wondering where I got the idea that the short rib was somehow part of the prime rib, and found my answer when speaking to the butcher the other day. I was ordering short ribs for a dinner party I am having on Saturday, and he said he'd take them from the rib instead of the chuck. Hmmm, so I asked him to explain. He said that the prime rib bone extends another 12 inches beyond what we normally see when getting a bone-in roast. At the end of that is where the short ribs are located, and are a little less fatty than thse from the chuck. So, thankfully, I cleared up why I connected prime rib to short ribs. Whew, that feels better now. Sue

These are conversations that I find truly interesting.....our likes and dislikes. I didn't find anything 'snarkey ' about most of the comments at all. It's just that we all usually refrain from making negative comments about any recipe. And that's probably the best policy when it comes to a recipe thread. (Clearly the best policy, judging by the reactions here.) Admit it! There have been times when you've gagged just a little at a recipe that has been posted! Lol Viva la difference! Thank God for the differences.

The only mention of "perrin of beef" on the entire worldwide web, as determined by Google, is on Gardenweb, through your question. Lots of people are named "Perrin" but the best food related match is a beer. There is also a Lea & Perrins steak sauce. Is the SIL's sister a native English speaker? If not, I'm guessing that that might be a good contender for what she was talking about, using "of" instead of "for". (Prepositions don't translate directly.)