How to Cook a Turkey for Christmas
A full Christmas turkey plan: what size to buy, how many days it needs to defrost, when to put it in, and how to keep the rest of the dinner moving around it.
Start with the calendar, not the oven
Christmas turkey goes wrong days before it goes in. A frozen bird needs to be fully thawed, in the fridge, before you can cook it, and for a large turkey that is measured in days, not hours. Work that date out first and everything else follows.
Work out when the turkey has to come out of the freezer: Defrosting Time Calculator
What size to buy
A whole turkey carries a lot of bone, so raw weight per head is much higher than you would allow for a boneless joint. If you want the traditional cold turkey on Boxing Day, buy for that deliberately rather than hoping there is some left.
Turkey Size Calculator gives the weight to buy for your numbers, and the Christmas Dinner Calculator covers the trimmings at the same time.
A turkey crown is a sensible answer for six to eight people: it cooks faster, carves easily and takes up far less oven space, at the cost of no legs and no carcass for stock.
Timing the bird
Turkey is timed by weight, and the time per kilogram falls as the bird gets bigger, which is why doubling the weight does not double the time. Use the weight of the bird as it will go in, including stuffing if you are stuffing the cavity.
For the roasting time, temperature and resting time: Turkey Cooking Time Calculator
Stuffing the cavity slows the heat reaching the middle and adds time. Cooking the stuffing in a separate dish is faster, more predictable and easier to serve: Stuffing Calculator.
Step by step on the day
1. Take the turkey out of the fridge about an hour before it goes in, and work out its finishing time backwards from when you want to eat, including the rest.
2. Cover the breast with foil or streaky bacon for most of the cooking, then uncover it for the last 30 to 45 minutes to colour the skin.
3. Check in the thickest part of the thigh, and in the middle of the stuffing if it is inside the bird. The safety guidance below is the wording to go by.
4. Rest it properly. A large turkey can rest for 30 to 45 minutes without going cold, and that is the window in which the roast potatoes, parsnips and Yorkshire puddings get a hot oven to themselves.
5. Reheat gravy and any make-ahead dishes while the bird rests, not while it is cooking.
Brining, if you want to
A brine helps a lean bird stay juicy, and it needs fridge space you may not have on Christmas Eve. If you are going to do it, work out the salt and water for the weight of bird first, and keep it chilled throughout: Brine Calculator.
Common mistakes
Assuming a fridge-defrosted turkey is ready. A large bird can still be icy in the middle after two days. Check before you commit to a timing.
Timing everything from the turkey coming out. The turkey's rest is the most useful oven window of the day, plan the potatoes into it.
One oven, six hot dishes. Write the schedule down. Most Christmas disasters are capacity problems, not cooking problems.
To turn the turkey and every trimming into one schedule with clashes flagged: Meal Synchroniser
Boxing Day
Carve what you need, then cool the rest and get it into the fridge promptly rather than leaving the bird out all afternoon. The carcass makes excellent stock and freezes if you have had enough for one day.
For how long the meat keeps and how to reheat it: Leftover Storage Calculator
Food safety
Food safety guidance
Poultry must be cooked all the way through. Cut into the thickest part and check it is steaming hot, the juices run clear and there is no pink meat. With a food thermometer, the middle should reach 70°C for two minutes, or an equivalent combination such as 75°C for 30 seconds.
Source: Food Standards Agency, Cooking your food: cooking poultry and pork (GOV.UK) · Reviewed 2026-09-11 · Guidance version 2.0.0
Defrost food in the fridge, not on the worktop, and make sure the middle is fully thawed with no ice crystals left. Partly defrosted food may not cook evenly. Use it within 24 hours of being fully defrosted.
Source: Food Standards Agency, How to chill, freeze and defrost food safely: defrosting food (GOV.UK) · Reviewed 2026-09-11 · Guidance version 2.0.0
Cooking times are a guide only. Ovens, joints and starting temperatures vary, so always check the food is cooked before serving rather than relying on the clock.
Source: Food Standards Agency, Cooking your food: cooking temperatures and times (GOV.UK) · Reviewed 2026-09-11 · Guidance version 2.0.0
Cool cooked food at room temperature and get it into the fridge within one to two hours. Eat leftovers within two days, or freeze them. Your fridge should be between 0 and 5°C.
Source: Food Standards Agency, How to chill, freeze and defrost food safely: chilling food (GOV.UK) · Reviewed 2026-09-11 · Guidance version 2.0.0
Reviewed against Food Standards Agency sources on 11 September 2026. How we calculate cooking times and safety guidance.
Calculators used in this guide
Related guides
- How to Make a Roast Dinner Finish at the Same TimeWork backwards from the time you want to eat, use the resting window for everything that needs a hot oven, and stop two dishes wanting different temperatures.
- How to Defrost Food SafelyWhy the fridge is the right place, roughly how long a joint or a bird needs, how to tell it is fully thawed, and how long you have once it is.
- How to Store and Reheat Leftovers SafelyCooling food quickly, how long it keeps, reheating until it is steaming hot, and why rice has its own rules.