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How Long to Cook a 20 lb Turkey — Large Bird Timing Guide

A 20-pound turkey is a commitment — you're feeding a large crowd (18–24 people) and dealing with the logistical realities of a very large bird: 4–5 days of fridge thawing, 4.5–5+ hours of cooking, and careful thermometer monitoring to ensure the thigh hits 165°F before the breast overcooks. Many experienced cooks spatchcock a 20-pound bird to dramatically reduce cook time. Use the calculator to build your full timeline.

A 20 lb turkey needs 4–5 days to thaw in the fridge — start thawing Sunday for a Thursday Thanksgiving. Alternative: spatchcock (butterfly) to cut cook time from 5 hours to 2.5 hours.
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Thawing first? Allow 24 hours in the refrigerator per 4–5 lbs of turkey. A 14 lb turkey needs 3 days to thaw safely. Never thaw at room temperature.

Frequently Asked Questions

How long does it take to cook a 14 lb turkey?
At 325°F, an unstuffed 14-pound turkey takes approximately 3–3.75 hours. Always cook to an internal temperature of 165°F measured in the thickest part of the thigh, not touching the bone.
Is it safe to cook a stuffed turkey?
The USDA recommends cooking stuffing separately for food safety — the stuffing inside the bird reaches 165°F long after the turkey meat is done, leading to overcooked, dry turkey. Cook stuffing separately for both safety and better texture.
How long to rest a turkey after cooking?
Rest a turkey for 20–30 minutes after removing from the oven. Tent loosely with foil. Larger turkeys stay hot longer than you think — they won't get cold in 30 minutes.
At what temperature is turkey done?
Turkey is done when the thickest part of the thigh reads 165°F (74°C) on an instant-read thermometer. Insert the thermometer away from bone, which conducts heat and gives a false high reading.

Frequently Asked Questions

How long does it take to cook a 20 lb turkey?
At 325°F, a 20-pound unstuffed turkey takes 4.5–5 hours. Stuffed, plan 5–5.5 hours. At 350°F, shave 30–45 minutes off. A spatchcocked (butterflied) 20-pound turkey at 425°F takes only 2–2.5 hours — a dramatic time saving that many large-bird cooks prefer.
How many days to thaw a 20 lb turkey?
A 20-pound turkey needs 4–5 days to thaw in the refrigerator (24 hours per 4–5 pounds). If buying frozen for Thanksgiving, move to the fridge Saturday morning for Thursday dinner. Cold-water thawing is faster — 30 minutes per pound in cold water, changed every 30 minutes — so a 20-pounder thaws in about 10 hours.
How many people does a 20 lb turkey feed?
A 20-pound turkey feeds 18–24 people generously, or up to 30 with plenty of sides and appetizers. After cooking, it yields 12–13 pounds of edible meat. Plan on 1 pound raw per person for a Thanksgiving-style meal with many dishes. For leftover-focused cooks, one large turkey is easier than two medium ones.
Should I spatchcock a 20 lb turkey?
Strongly recommended for a 20-pound bird. Spatchcocking (removing the backbone and flattening) reduces cook time from 5 hours to 2–2.5 hours at 425°F, produces dramatically crispier skin across all surfaces, and ensures more even cooking of breast and thigh. The tradeoff is presentation — the bird doesn't look whole on the table. Many cooks spatchcock for flavor and carve in the kitchen.

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