Perfect Prime Rib

Prime Rib has always been one of my favorite things to order at a restaurant.  Its so juicy and always perfectly cooked.  I’d never tried to make it at home before but I figured I’d give it a shot.  However, when I went to the store the actual prime rib at BJs was $120!!  Luckily, I was able to get the butcher to cut me a more manageable 5 Lb cut of rib. To cook it, I decided to use my homemade Sous Vide setup so I could get the ideal finish level. It worked out really well!

Finished Prime RibThe prime rib turned out excellent! It was really tender and medium rare!

Prime RibStart with a nice cut of prime rib and liberally apply salt and pepper.  Note that prime rib is a little confusing in the sense that prime is the grade of the meat and rib refers to the section which it is cut.  So in reality you will probably end up getting choice rib but that’s besides the point.  I went to my butcher (at BJs) and asked him for 5 lbs of prime rib.

Vacuum Sealed Prime RibNext, seal the prime rib with your vacuum sealer.

Sous Vide Prime RibTo cook the prime rib, we will submerge it in hot water for 10 hours.  I am using my homemade sous vide machine but you can also buy one from amazon.  I cooked it at 58 degrees which is on the border of medium and medium rare.  If you like it more rare, adjust it down.

Sous Vide Cooked Prime RibHere is the prime rib after 10 hours of cooking.

Prime Rib in OvenThe Sous Vide method doesn’t char the outside of the roast at all so after cooking it, briefly broil it in the oven to char the outside.

Temperature of cooked Prime RibAfter the roasting, you can see that the roast is a perfect 133 F via my thermapen. By the way, I just got this thermometer and it is by far the best thermometer I’ve ever had. It’s super fast to read and waterproof.

Cut Prime RibHere is the cut prime rib!  It was absolutely ridiculously good!!

Prime Rib with Horseradish and Brussels SproutsHere is the prime rib served with horseradish sauce and bacon brussels sprouts.

Leftover Prime RibAlso, a note on leftover prime rib.  Normally I would microwave leftover meat.  However, with Sous Vide, you can really do an interesting trick where to heat it back up, you just set the Sous Vide to the same desired temperature and heat the meat for 45 minutes.  Also, you don’t have to always use an expensive vacuum sealer, for the leftovers I used these ziploc vacuum sealed bags.

Sous Vide Prime Rib
Prep time: 
Cook time: 
Total time: 
  • 5 Lbs Prime Rib
  • To Taste Salt and Pepper
  1. Salt and pepper the meat
  2. Set the Sous Vide to 58 C or your desired finish temperature
  3. Vacuum seal the Prime Rib
  4. Cook for 10 hours
  5. Broil the finished Prime Rib for several minutes
  6. Slice and serve!


Anova Sous Vide Cooker
Sous Vide was one of my first forays into extreme stunt cooking. I made my own DIY Sous Vide machine but you can skip all that trouble and just pick up a commercial model. The prices have dropped dramatically and its insane how nice cuts like prime rib cooked for 10 hours come out!
FoodSaver V3835 Vacuum Food Sealer
A Vacuum Sealer is more like an enabling technology in the CMK kitchen. Its necessary for a Sous Vide setup but once you get one you’ll find yourself resealing half eaten bags of pork rinds, or buying bulk meats at BJs and freezing them in perfectly sealed, pre-portioned bags.
This probably shouldn’t be the first thing you buy for your keto kitchen, but eventually, you’ll end up buying this thermapen. It seams ridiculous to blow $80+ on a temperature probe but once you go through 5 other cheap ones, or burn your hand waiting for the temperature to stabilize, you’ll wish you just picked one of these up. Its way faster and more accurate at reading temperature and I now almost exclusively cook meat to a done temperature rather than a specific time.


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