Can I still use frozen beef brisket left out at room temperature for 12 hours? Possible Duplicate:
  How long can I store a food in the pantry, refrigerator, or freezer?  




I left out 2 raw but frozen 6 lbs beef briskets in the sink at 7PM to thaw out because they were rock hard from the freezer. I had intended to transfer them to the refrigerator but only the next morning at 7AM did I remember that I had forgotten to put them in the refrigerator.

They will be seared on both sides first in a heavy cast iron pan and then braised for 3-4 hours in the oven. Is this still safe?
Unfortunately, as sad as it is to see two nice briskets get wasted, I would not feel comfortable using them. In the guidelines from the USDA, thawing on the counter is explicitly discouraged. Additionally, it is likely that in that amount of time the surface of the cuts came up to temperature to allow for otherwise inactive (due to freezing) pathogens to become active again. In the absence of a vacuum pack and having been left at room temperature for that long, it is likely that even in the original paper wrapping the food has become unsafe to eat.