How long to cook Internal Temperature

What's the Internal Temperature for Cooking a Prime Rib Roast?

The USDA's recommended temperature for a prime rib roast is at least 145 degrees, but the internal temp for cooking prime rib roast when done to your liking may be different. That's because the USDA guideline will leave you with a roast that's cooked medium-well, and most people like their prime rib less done than that. This means that the ideal internal temperature for your prime rib recipe is partly a matter of preference: You'll need to think about the doneness you like and whether it's worth the risk for you.

The best way to check whether your prime rib is done is to use an instant-read thermometer and stick it into the thickest part of the meat. It should read:

For the best results, take the roast out of the oven when it's a few degrees shy of your target temperature and let it rest. The carryover heat will cook it the rest of the way, and the juices will have a chance to sink back into the meat so they don't run out when you cut it.

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