You can find prime rib at most of your grocery stores, but I recommend going to your local butcher or premier meat shop. Fat equals flavor, so look for a USDA Prime prime rib roast. You may see that your local grocery store only has USDA Choice roasts. For a real treat, check out this American Wagyu prime rib from Snake River Farms. It is exceptionally marbled with fat and incredibly juicy and tender. It is definitely worth the splurge to make a statement at your next family dinner!