Unless you picked up one of those birds with a pop-up timerand even if you did, since they don’t workyou’ll want to have a thermometer on hand this Thanksgiving to tell when the turkey is done. 

But the thermometer plays another crucial role in the holiday meal: if you’ve bought a frozen turkey, from both a proper-cooking and a food-safety perspective, it’s also a good idea to take its temperature from time to time as it thaws.

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