Chicken cooking times

Chicken is the one category where undercooking is genuinely dangerous rather than merely disappointing, so every time here is paired with a temperature. 74 degrees Celsius, measured in the thigh on a whole bird rather than the breast.

Chicken timing is really two problems wearing one name. Breast is lean, has almost no collagen, and is at its best the moment it is safe, so everything past 74 °C costs you moisture. Thigh is the opposite: full of connective tissue that only softens above about 76 °C, which means it improves with the extra heat that ruins breast.

That is why a whole bird is genuinely awkward. You are cooking both cuts at once, they want different endpoints, and the thigh is the slower of the two. Every time below is a starting point and the thermometer is the answer.

Three things worth knowing before you start

Measure the thigh, not the breast

On a whole bird the thigh is the last part to come up to temperature, so a breast reading 74 °C means the thigh is not there yet. Push the probe into the thickest part of the thigh, angled towards the body, stopping short of the bone. Bone conducts heat and reads hotter than the meat around it.

Pink juice proves nothing

Juice colour comes from myoglobin and varies with the bird, its age and how it was chilled. A properly cooked chicken can still run faintly pink near the bone, and an undercooked one can run clear. This test has been unreliable for as long as people have been using it.

Spatchcock if you can

Cutting out the backbone and flattening the bird solves the breast and thigh problem outright. Both cook in roughly the same time, the skin crisps across the whole surface, and a 1.8 kg bird comes down from about 90 minutes to nearer 50.