Samin Nosrat has adapted her wondrous buttermilk-brined roast chicken recipe to turkey, just in time for Christmas.

I've got a lot of strong opinions about turkey. It's probably because I've cooked more of it than practically anyone I know, in just about more ways than I can list. I've roasted, braised, grilled, spit-roasted and deep-fried it. I've boned it out and made "turchetta". I've dry-brined it, wet-brined it, injected it with brine and stuffed slabs of herbed butter under its skin. I've built a makeshift cinder-block oven to cook it at a friend's farm that lacked a kitchen. I've even cooked 20 turkeys in a night, working Thanksgiving in a restaurant.

As I look back on all of this poultry, though, one thing is clear: no matter how complicated or technical the preparation, no one turkey I've ever cooked has been that much more exciting to eat than any other.

The truth is, deep down in my heart, I've always secretly hoped that if I cook it just right, a roast turkey will emerge from the oven as tender and juicy as a perfect roast chicken. And I suspect I'm not the only one who feels that way. But the fact of the matter is that it's a different bird! And it has completely different qualities.

So let's stop wishing our turkeys could be chickens, and let's stop making ourselves unnecessarily miserable by complicating the cooking process. When it comes to turkey, simpler is better.

While I've finally, grudgingly, admitted that turkey isn't chicken, it has occurred to me that I might be able to adapt my favourite roast chicken recipe. Three years ago, I published a recipe for three-ingredient, buttermilk-brined roast chicken in my book, Salt, Fat, Acid, Heat. It's now among the most beloved of my recipes.

I set about tinkering, and the first thing I changed was timing. The chicken takes a simple overnight dip in the buttermilk, but a turkey weighs three times as much as a chicken, so it needs to spend a full 48 hours in the brine to ensure the meat is tender and properly seasoned throughout.

Next, the salt. Unlike the original chicken recipe, which leaves things to chance, I decided to specify the turkey brine's ideal salinity – no one wants a bland holiday bird. I also know that different salts have different levels of salinity by volume, but not by weight. So, if you've got one, I encourage you to use a scale to measure out your salt to ensure a balanced brine. It's just about the trickiest part of the recipe, and I promise you won't regret it.

The last and most obvious change was my decision to spatchcock the turkey. By removing its backbone and flattening it out, I cut the cooking time by more than half. While in the chicken recipe, the lactose in the buttermilk contributes to perfectly golden-brown skin, I'd worried that a turkey's significantly longer cooking time might yield a blackened bird.

Spatchcocking put an end to that fear. Furthermore, laying the bird out flat means there's greater surface area for browning – more of that dark, lacquered skin for everyone.

An unexpected boon of spatchcocking is how beautifully it streamlines the entire brining process: Without a backbone, the turkey can just be folded in half and slipped into a 7.5-litre extra-large press-seal plastic bag containing the buttermilk and salt. There's no unwieldy pot or bowl taking up all of your refrigerator space. Just slip the bag in wherever it fits, turn it two or three times a day, and that's it. Simplicity is everything here.

It yields incredibly tender meat that's seasoned through and through, enveloped in that showstopping caramel-brown skin that's such a pleasure to eat. And it's utterly simple and satisfying. In a year full of so many other complications, let your holiday bird be stress-free.

Buttermilk-brined roast turkey

INGREDIENTS

• 1 (4.5kg-6.3kg) turkey
• 2.8 litres buttermilk
• 128g fine sea salt (about 7 tbsp)

METHOD

1. Two to three days before you plan to cook, spatchcock the turkey: Put the turkey on a stable cutting board, breast-side down, and use heavy-duty kitchen shears to snip along both sides of the backbone to release it. You can start from the tail or neck end, whichever you prefer; just keep the blades of the scissors as close to the spine as possible. It helps to work incrementally, snipping a little on one side, then a little on the other, rather than completing one side entirely and then doing the second side without the advantage of the opposing pressure.
2. After removing the backbone, remove wingtips, neck and giblets, setting them all aside for stock and gravy.
3. Turn turkey over so breast faces up. Splay out its legs and press hard on the breastbone until you hear the cartilage pop and the bird lies completely flat.
4. Place a 7.5-litre extra-large resealable bag in a large bowl, stock pot or sink. Pour buttermilk and salt into bag and stir to dissolve salt. Place turkey in bag and seal carefully, expelling air. Double-bag the turkey as needed to prevent leakage, then squish the inner bag to distribute buttermilk all around the bird. Place it on a rimmed baking tray and refrigerate for 48 hours. Turn the bag every 12 hours so that every part of the turkey gets marinated.
5. Three hours before you plan to start cooking, remove the turkey from the plastic bag and scrape off as much buttermilk as you can without being obsessive, discarding buttermilk. Set the turkey on a rimmed baking tray and bring it to room temperature.
6. Position a rack in the upper third of the oven and heat to 180C fan-forced (200C conventional). Transfer turkey, breast-side up, to another rimmed baking tray lined with a wire rack or baking paper. Tuck thighs inward.
7. Place baking tray on the prepared oven rack and roast the turkey, occasionally rotating the pan 180 degrees, until an instant-read thermometer inserted into the deepest part of the breast registers 65C and the thickest part of the thigh without touching bone registers 75C, about 80 to 100 minutes, depending on size. (You may want to tent the breast or other hot spots with aluminium foil, if darkening too quickly.)
8. Transfer turkey to a cutting board or platter and allow to rest at least 20 minutes before carving.

Serves 10-14

Buttermilk-brined turkey breast

INGREDIENTS

• 500ml (2 cups) buttermilk
• 33g fine sea salt (2 tbsp)
• 1 half turkey breast (about 1.1kg), on or off the bone

METHOD

1. One to two days before you plan to cook, place buttermilk and salt in a large resealable plastic bag and stir to dissolve salt. Place turkey breast in the bag and seal carefully, expelling the air. Squish the bag to distribute buttermilk all around the turkey, place on a rimmed plate, and refrigerate for 24 to 36 hours. If you're so inclined, you can turn the bag periodically so every part of the turkey gets marinated, but that's not essential.
2. Two hours before you plan to start cooking, remove the turkey from the plastic bag and scrape off as much buttermilk as you can without being obsessive. Discard buttermilk, set the breast on a rimmed plate and bring it to room temperature.
3. Position a rack in the upper third of the oven and heat to 200C fan-forced (220C conventional). Place breast skin-side up on a rimmed baking tray lined with a wire rack or baking paper.
4. Place baking tray on the prepared oven rack and roast the turkey until an instant-read thermometer inserted into the deepest part of the breast without touching bone registers 65C, about 40 minutes for a boneless breast or 50 minutes for a bone-in breast. (You may want to tent the breast with aluminium foil if it's darkening too quickly.)
5. Transfer turkey to a cutting board or platter and allow to rest at least 15 minutes before carving.

Serves 4-6

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