How long do I smoke an 8- to 10-pound sirloin tip roast at 250°F? Do you have a good recipe for au jus sauce?
For medium rare I’d cook that roast until it reaches an internal temp of 130°F using an internal read thermometer. Then I’d tent it with foil and let it rest for 15 minutes. How long at 250°F? It will depend on your cooker but I’d guess about 4 to 5 hours. You really can’t do it by time though. As for the Au Jus, don’t tell anyone but I use the stuff in the package from the grocery store.