What do I do if my brisket internal temp shot up way faster than expected? It was at 180 degrees after only 4 hours. I picked up a 10.1 pound prime brisket from Costco. I am having some friends over later today, so I estimated that I wanted it to be ready at 5:00pm. I know the amount of time a brisket will take can vary, but I figured if it was done a little early, it could wait in the cooler longer. I figured the range in time would be about 12 - 15 hours to cook it. I figured this out based on 1.25 hours per pound to 1.5 hours per pound with a smoker temp of 225 degrees. My plan was to cook it to 170 degrees internal temp and then wrap it in foil and cook to 195 - 200. Then I was going to wrap it in some towels and let it rest in a cooler until it was time to eat. At 15 hours to cook and two hours to rest, that would mean that I would have to start the brisket at midnight. I decided I would start it at 2:00am figuring we could always eat a bit later. I put the brisket in to my 30" MES at 2:00am this morning. I was monitoring the temps through a Maverick temp probe. At 6:00am this morning, I checked the temp monitor and it showed an internal temp of 180 degrees already. I thought there was no way that was right, so I opened the smoker and checked it with two other thermometers and both came out with the exact same temp. Wow!! That was much quicker than I ever thought would be possible. I went ahead and wrapped it in foil and put it back in, but it looks like we may be eating lunch instead of dinner . Did I do something wrong? I don't know how much longer it will take to finish, but what is the best way to keep it hot for dinner. Am I just going to have to reheat it tonight? I still can't believe how quickly this thing is cooking.