Defrosting A Turkey At Room Temperature. At room temperature about 20ºC 68ºF allow approximately two hours per kg. If there arent any defrosting instructions use the following times to work out roughly how long it will take to thaw your turkey.
The laws of physics are apparently different north of the 49th parallel and poultry is required to reach 180F. Turkey Crown is 28kg so thats 28hours or so. Since bacteria can grow at temperatures that are above 8C and below 63C your fridge is the best place to ensure that the defrosting bird does not enter this danger zone.
That gives you the temperature difference you want at the end of roasting 150 degrees in.
This fact rules out defrosting a turkey at room temperature. Uncooked meat or poultry including frozen shouldnt be left at room temperature for more than two hours. Its fine to bring the bird partway to room temperature before roasting. Always keep this in mind regardless.
