How long to cook 21lb turkey in a roasster?

I can't give you an exact time to cook a 21lb turkey in a roaster, as there are several factors that influence cooking time:

* Oven Temperature: A higher temperature will cook the turkey faster.

* Turkey Size & Shape: A larger turkey will take longer to cook than a smaller one.

* Stuffing: A stuffed turkey takes longer to cook than an unstuffed turkey.

* Your Roaster: The size and material of your roaster can affect heat distribution.

Here's how to calculate the cook time:

1. Pre-heat oven to 325°F (165°C).

2. Use a meat thermometer. This is the most reliable way to know when your turkey is cooked through.

3. Allow 13-15 minutes per pound. This is a general guideline, but you may need to adjust the cooking time based on the factors mentioned above.

4. Check for doneness. The turkey is cooked through when the internal temperature reaches 165°F (74°C) in the thickest part of the thigh, without touching bone.

Here's an example:

For a 21lb turkey, using the guideline of 13-15 minutes per pound, the cooking time would be roughly 3-4 hours.

Important Tips:

* Always use a meat thermometer. Do not rely on visual cues alone.

* Let the turkey rest for 30 minutes after cooking. This allows the juices to redistribute, resulting in a more moist and flavorful turkey.

* Remove the turkey from the oven when the internal temperature reaches 165°F (74°C), even if the estimated cooking time hasn't been reached.

By following these guidelines and monitoring the internal temperature, you can ensure your 21lb turkey cooks perfectly in your roaster.