One more prime rib recipe! We’ve done prime rib in every possible way, so we are rounding out our collection with this slow cooker prime rib! We couldn’t leave out the trusty slow cooker!
We’ve roasted prime rib, smoked prime rib, and cooked prime rib in the Instant Pot so all we are missing is the slow cooker. You’ve asked and we are answering! Whether it’s Thanksgiving, Christmas dinner or just a nice Sunday dinner, prime rib in the slow cooker is a great option!
I am a huge fan of making dinner in the slow cooker. Some days just call for a crock pot meal. I especially like them for Sunday dinner. I can throw everything in the slow cooker in the morning, and then dinner is ready at meal time. So easy!
Now you can have this decadent main dish with the convenience and ease of the slow cooker! There’s not much to it, so let’s jump into this prime rib recipe…
How to Buy the Right Prime Rib?
I’m going to go against almost everything I believe and tell you to get a boneless prime rib for this recipe. We found it works way better in a slow cooker to not have the bones in the roast. Go figure! No bone-in for this recipe!
You will want to talk to your butcher and ask for a prime rib roast with an untrimmed fat cap (ideally ½ inch thick). We prefer the flavor and texture of prime-grade beef, but choice grade will work as well, just ask the butcher which he has. Choice grade will be cheaper.
How to Make Prime Rib in the Slow Cooker?
Making a prime rib in a slow cooker is about as easy as it gets. It just takes a little prep on the roast itself, and then the slow cooker does all the rest.
Start by cutting slits into the fat pad on the top of the meat. Cut at a diagonal and then cut slits in the opposite direction so that a diamond patter is formed. You can watch the beginning of the video for our absolute best prime rib for a demonstration of this step.
Rub salt and pepper all over the meat and down in the slits you just cut. Place the roast in a baking dish and let it sit in the refrigerator uncovered for 12-24 hours. This allows the prime rib to get nice and dry so that beautiful crust forms on the outside when it cooks.
After the roast has rested in the refrigerator, pull it out and let it sit on the counter for an hour to take the chill off and come to room temperature. Heat a skillet over medium high heat and sear all sides of the meat until golden brown.
Thoroughly mix together the butter, rosemary and garlic. Place the browned roast in the crockpot fat side up and rub the butter mixture all over the top of the roast. Cook the prime rib on low for 3-5 hours depending on how done you want the roast to be. We like ours medium (140 degrees F) which takes about 3.5-4 hours (Rare – 130 degrees F, medium rare – 135 degrees F).
When the roast has reached t