How Long Does It Take to Cook a 20 Pound Turkey? A Complete Guide

To some, turkey is a succulent holiday centerpiece. To others, it’s a vehicle for gravy. But turkey can be great (delicious even) if you know how to cook a turkey properly so that it hits the ideal internal temperature without going over. Whether you’re a longtime Thanksgiving pro feeling bogged down by the year’s newest trend (Is it spatchcocked or dry-brined turkey this year? Turkey breast only? Or maybe confit? We can’t keep up!) or a holiday-hosting newbie who’s preparing a whole turkey for the first time, you can rely on this foolproof guiding principle: You don’t need a special recipe if you just stick to the basics. Ahead you’ll find everything you need to know, including step-by-step instructions, to make the perfect turkey.

In a hurry? Scroll down to get right to our table of turkey cook times. Or scroll even further for our guide to cooking a turkey that’s still frozen solid.

Cooking the perfect turkey for Thanksgiving or any special occasion requires knowing exactly how long to cook it. The size of the turkey is the biggest factor in determining cook time. A 20 pound turkey takes significantly longer to cook than a smaller 12 pound turkey.

Follow this complete guide to get your 20 pound turkey cooked to juicy, flavorful perfection.

Overview of Cook Times for a 20 Pound Turkey

Here’s a quick overview of approximately how long you’ll need to roast a stuffed and unstuffed 20 pound turkey:

  • Unstuffed: about 4 1⁄4 to 4 1⁄2 hours
  • Stuffed: about 4 3⁄4 to 5 hours

These times are based on roasting at 325°F. Continue reading for more details on cook times, including how frozen turkeys, brining, and high elevations can affect the time required.

Detailed Cook Times Based on Preparation Method

Several factors impact exactly how long you’ll need to cook your 20 pound turkey Here are cook times broken down by preparation method

Unstuffed

  • Standard Roast: 4 1⁄4 to 4 1⁄2 hours
  • Brined: Add 30 minutes
  • Frozen: Add 50-100% more time

Stuffed

  • Standard Roast: 4 3⁄4 to 5 hours
  • Brined: Add 30 minutes
  • Frozen: Add 50-100% more time

High Elevation

If cooking at high elevations above 3,000 feet

  • Unstuffed: Add 30 minutes
  • Stuffed: Add 45 minutes

As you can see, brining and high elevations add a bit more cook time, while frozen turkeys take significantly longer.

Tip: For food safety, thaw frozen turkeys in the fridge 1 day for every 4 pounds of turkey.

Why Cook Time Varies for 20 Pound Turkeys

The cook times listed above are ranges because there are a few factors that can cause cook time variability

  • Turkey Shape: Tall, irregular shaped turkeys take longer than short, rounded turkeys.

  • Fat Content: Less fatty turkeys cook faster. Higher fat content retains more heat.

  • Temperature: Colder fridge temperatures prior to cooking prolong cook time.

  • Pan Size: Cooking in an overcrowded pan slows heat circulation.

  • Oven Differences: All ovens heat slightly differently.

Given all the variables, I recommend planning for the higher end of the time range provided earlier. It’s always better for the turkey to be done early and left to rest than to rush it at the last minute.

How to Tell When Your Turkey is Done

Monitoring the turkey’s temp is the most reliable way to determine when it’s finished cooking. Use an instant-read thermometer to check the temperature in the innermost part of the thigh and wing. Once it reaches 165°F the turkey is safe to eat.

If you don’t have a thermometer, you can check for doneness by wiggling the leg. It should feel loose in the hip joint when fully cooked. Also check that the juices run clear when you pierce the turkey with a knife or fork.

When fully cooked, the meat will have pulled away from the bone and the internal temperature should be 165°F throughout.

Step-By-Step Guide for Roasting a 20 Pound Turkey

Follow these simple steps for roasting turkey success:

  1. Take the turkey out of the fridge 1-2 hours before cooking to allow it to come closer to room temp. This helps it cook more quickly and evenly.

  2. Preheat your oven to 325°F. Many ovens take 30 mins or longer to fully preheat.

  3. Prepare your turkey for roasting: Remove giblets, rinse cavity, pat dry skin. Tuck wings under, tie legs together. Lightly coat with oil or butter. Add seasoning.

  4. Place turkey breast up on a sturdy roasting pan. Add veggies like onion, carrots and celery to the pan for extra flavor.

  5. Roast turkey at 325°F, basting occasionally:

    • Unstuffed: 4 1⁄4 to 4 1⁄2 hours
    • Stuffed: 4 3⁄4 to 5 hours
  6. Check internal temp with a thermometer to confirm 165°F has been reached.

  7. Let turkey rest 30 mins before carving so juices redistribute evenly.

  8. Carve turkey and serve with your favorite holiday sides and fixings. Enjoy!

Cook Even Faster with Spatchcocking

An alternative turkey roasting method called spatchcocking can significantly decrease your cook time.

To spatchcock, the backbone is removed so the turkey can lie flat in the pan. This allows for quicker, more even cooking.

A spatchcocked 20 pound turkey only takes about 2 3⁄4 to 3 hours to roast since the time is reduced by about 25%.

Tips for the Juiciest, Most Flavorful Turkey

Implement these tips for incredibly tender, delicious turkey:

  • Brine the turkey in a saltwater solution up to 2 days before cooking. This infuses flavor and moisture.

  • Dry brine by heavily salting the turkey 1-3 days in advance. Also improves moisture and flavor.

  • Rub butter or oil under the skin to keep the breast meat super moist and juicy.

  • Cook on a rack over a roasting pan. The rack allows air flow for even cooking.

  • Baste with turkey drippings 2-3 times during roasting. Basting keeps the turkey nice and moist.

  • Let turkey rest before carving. Skipping this step results in dry turkey as juices spill out.

  • An unstuffed 20 pound turkey takes about 4 1⁄4 to 4 1⁄2 hours to roast at 325°F.

  • A stuffed 20 pound turkey takes about 4 3⁄4 to 5 hours to roast fully.

  • Exact cook time is influenced by thawing, stuffing, brining and oven differences.

  • Use a thermometer to confirm the turkey reaches 165°F internally before serving.

  • Letting the turkey rest before carving and proper basting ensures a super juicy bird.

  • Spatchcocking can reduce cook time by 25%.

Follow this guide and your 20 pound turkey will turn out mouthwateringly moist and delicious, even with the longer cook time required. Happy Thanksgiving cooking!

how long does it take to cook a 20 pound turkey

The Simplest Way to Cook a Turkey Thaw your turkey.

The ideal place to thaw a frozen turkey is in the fridge, which can take up to a week, depending on the size of the bird. Here’s how long it takes a typical turkey to thaw in the fridge:

  • 4–12 pounds: 1 to 3 days
  • 12–16 pounds: 3 to 4 days
  • 16–20 pounds: 4 to 5 days
  • 20–24 pounds: 5 to 6 days

If you’re short on time, there are other, faster ways to thaw a turkey, but thawing it in the refrigerator is your best bet when it comes to safe kitchen practices. For tips on preparing a turkey for Thanksgiving, click on our guide:

When the time arrives to cook your bird, take the now-thawed turkey out of the fridge and set it on a rack at room temperature for an hour to take the chill off and dry out the skin. (This can be the same rack you plan to use to roast your turkey; there’s no need to dirty another dish.) Your roasting rack should allow the bottom of the turkey to sit at or just below the top of the pan. No roasting rack? A heavy-duty cooling rack set inside a half-sheet pan works too.3. Prep your oven.

Position your oven rack on the lowest rung and set the oven to 350°F. Some recipes have you start roasting the turkey at a high oven temperature for a brief period before lowering the heat for the duration. The belief is that the high heat “sears” the bird and the low heat gently roasts, yielding a bird that’s more moist and succulent, but we haven’t found that this makes a huge difference. Plus, the skin gets browned very quickly (often too quickly). Steady heat means not having to check the oven so frequently, leaving you free to do other things, like prep your mashed potatoes and other Thanksgiving side dishes.4. Butter your turkey.

Set your turkey breast side up on the roasting rack and rub room-temperature salted butter—or your favorite flavored compound butter—all over it. (For a 12- to 14-pound turkey, you’ll need about ½ cup [1 stick] of butter.) Slowly work your fingers under the skin, starting at the neck, being careful not to tear the skin or separate it completely at the large cavity. Rub most of the butter under the skin, a little inside the large cavity, and the rest over the skin.5. Season your turkey (if necessary).

If you’ve chosen to brine your bird (via a wet or dry brine) you can skip this final seasoning. For kosher turkeys, which are already salted, there’s no need to salt the cavity, but you will want to salt the skin. Here’s how to do it: For a 12- to 14-pound bird, sprinkle 1½ teaspoons each kosher salt and freshly ground black pepper in the large cavity and another 1½ teaspoons each over the skin.

Sounds random, we know. But stuffing the neck cavity (not the large cavity) with a halved apple—placing the cut side against the turkey’s flesh with the rounded side facing out—helps buffer the breast against heat and protects it from overcooking. But don’t fill the main cavity with stuffing—it’ll only slow down your cooking time. Instead, prep your stuffing recipe in a casserole dish and bake it on the side.7. Add some aromatics.

Not stuffing your turkey means there’s room in the cavity for aromatics, which will add flavor and aroma to the bird and add complexity to the pan drippings used to make gravy. Try placing onion quarters, celery stalks, parsley, thyme, and other fresh herbs inside the turkey before roasting.

You can also place some aromatics right in the roasting pan, under the rack. These will caramelize in the more direct heat, perfuming the meat and further flavoring the drippings. Add a few halved shallots, sliced carrots, and some celery. Whether you choose to add aromatics or not, pour 2 cups of water into your roasting pan to prevent those drippings from burning.8. Cover (and then uncover) the turkey.

Loosely cover the bird with aluminum foil, shiny side out (to deflect heat) at the very beginning of roasting. Tenting with foil keeps the skin from getting too dark too soon. Remove the foil about halfway through cooking to let the skin brown.9. Skip the basting.

Some traditional recipes call for basting the turkey, ostensibly to moisten and flavor the bird. We’ve found that opening the oven door too often lets too much heat escape, lengthening the cooking time. Additionally, squirting or brushing broth onto the skin will prevent it from browning evenly and can cause it to lose any crispness it might achieve. The better way to ensure a moist bird is to dry-brine it before cooking.10. Calculate turkey cooking time and temperature.

The simplest way to figure out turkey roasting times is to calculate 13 minutes per pound at 350°F for an unstuffed turkey (that’s about 3 hours for a 12- to 14-lb. turkey), or 15 minutes per pound for a stuffed turkey. Check the temperature about three quarters of the way through that time, and then again every 10 minutes, and roast until the temperature reads 165°F (or 150°F as the case may be; more on that below) when checked at the thickest part of the thigh meat and the thickest part of the breast meat.

If, however, you prefer to roast your turkey at a higher or lower temperature, follow these guidelines. (The following cook times are for unstuffed birds. Our rule of thumb is to avoid stuffed turkeys and instead to bake the stuffing alongside so that it can easily reach a safe temperature.)How long to cook a turkey per pound:

  • For an 8- to 12-pound turkey:
  • 325°F for 2¾ to 3 hours
  • For a 12- to 14-pound turkey:
  • 425°F for 2¼ to 2½ hours
  • 400°F for 2½ to 2¾ hours
  • 350°F for 2¾ to 3 hours
  • 325°F for 3 to 3¾ hours
  • For a 15- to 16-pound turkey:
  • 425°F for 3 to 3¼ hours
  • 400°F for 3¼ to 3½ hours
  • 350°F for 3½ to 3¾ hours
  • 325°F for 3¾ to 4 hours
  • For an 18- to 20-pound turkey:
  • 425°F for 3½ to 3¾ hours
  • 400°F for 3¾ to 4 hours
  • 350°F for 4 to 4¼ hours
  • 325°F for 4¼ to 4½ hours
  • For a 21- to 24-pound turkey:
  • 425°F for 4 to 4¼ hours
  • 400°F for 4¼ to 4½ hours
  • 350°F for 4½ to 4¾ hours
  • 325°F for 4¾ to 5 hours
  • For a turkey that weighs 24 pounds or more:
  • 425°F for 4¼ to 4½ hours
  • 400°F for 4½ to 4¾ hours
  • 350°F for 4¾ to 5 hours
  • 325°F for 5 to 5¼ hours

According to the USDA, a turkey must be cooked to a minimum internal temperature of 165°F to kill harmful bacteria. For the juiciest meat, you’ll want to remove your bird from the oven when the temperature reaches 150°F. The temperature will continue to rise as the turkey rests and should reach 165°F within 30 minutes of being removed from the oven. Some cooks, including Epi’s food director Chris Morocco, prefer dark meat when it’s cooked to an internal temperature of 190°F, which will allow more of the collagen and connective tissues to break down, rendering more tender meat. This higher temp would dry out white meat though, so it’s best to only aim for it when cooking turkey in parts.

Whichever turkey roasting temperature you choose, be sure to use an accurate meat thermometer to confirm the final temperature. In the past, home cooks used to look at the color of the meat as an indication of doneness: The turkey was pierced with a knife and if the juices were clear instead of pink it was considered done. But this is not a reliable method for several reasons. First, pinkness can disappear before a safe temperature is reached. And on the flip side, some turkeys (especially organic and heritage birds) may never lose their pink color, even if they’re cooked to well above 165°F.

To check the temperature of the turkey, you can use either an instant-read thermometer or a remote food thermometer (the type that has a probe you insert before cooking, which connects to a digital display that sits on your counter). Either way, insert the thermometer so that its point reaches the thickest part of the turkey’s breast. Be careful not to touch the bone (which will skew the reading). You should also check the thigh to ensure the turkey is cooking evenly all the way through.

If you find the skin is getting too dark and the desired internal temperature hasn’t been reached, loosely tent the browned parts with a double-thick layer of buttered aluminum foil to protect them from the heat.

When the roast turkey has reached the right temperature, it’s essential to let it rest for at least 30 minutes before carving. This gives the juices time to settle into the bird and be reabsorbed; carving it up too soon will just allow the moisture to run out, leaving you with dried-out meat on top of a puddle on your cutting board. It is not necessary to cover the turkey with aluminum foil while it rests, and doing so will only cause the skin to go limp. The turkey can rest for up to 90 minutes and still be hot come carving time. Which means you’ve got plenty of time to make gravy.

How to Cook a Heritage Turkey

With longer thighs and drumsticks, a leaner breast, and a more diminutive size compared to a standard supermarket turkey, heritage birds look, taste, and cook differently than your average Thanksgiving fowl. Heritage birds generally top out at 14 to 16 pounds, so if you plan on serving a larger crowd, you might want to roast two side by side. An added bonus is that smaller birds cook more quickly than their fleshy cousins, so you don’t need to rise at dawn if you like to eat Thanksgiving dinner at noon.

Because they tend to have a more active lifestyle, heritage turkeys must be roasted differently in order to avoid toughness. Roasting the bird slowly, at a lower temperature is the best way to achieve tender meat. You should still prep the bird with butter, salt, and pepper, as described above (or dry-brine it). To cook, set your oven to 325°F and roast for 3½ to 4 hours for a 12- to 14-pound bird. Most important, pay attention to the internal temperature. It’s important to note that the nature of some heritage breeds yield flesh and bone that may still have a pinkish hue, even when fully cooked. But, as long at the temperature has reached 165°F on a reliable meat thermometer, you needn’t worry.

How long does it take for a 20 pound turkey to cook in the oven?

FAQ

How long does it take to cook a 20lb turkey at 350 degrees?

For an 18- to 20-pound turkey: 425°F for 3½ to 3¾ hours. 400°F for 3¾ to 4 hours. 350°F for 4 to 4¼ hours.

Is it better to cook turkey at 325 or 350?

It’s better to cook a turkey at 350°F after preheating the oven to 450°F. This makes the skin crispier and ensures the turkey will get cooked evenly.

How long to cook an unstuffed 20 lb turkey?

How Long to Cook an Unstuffed Turkey
Weight
Cook Time
Servings
12 to 14 pounds
3 to 3¾ hours
8 to 9
14 to 18 pounds
3¾ to 4¼ hours
9 to 12
18 to 20 pounds
4¼ to 4½ hours
12 to 13
20 to 24 pounds
4½ to 5 hours
13 to 16

What is the temperature of a fully cooked 20 lb turkey?

Regardless of the size of your turkey, it’s safe to eat once its internal temperature reaches 165°F, which you can gauge using a meat thermometer.

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