Should I use chicken thighs or chicken breasts?

The fat and collagen difference that makes thighs forgiving and breasts unforgiving, and which dishes each actually suits.

Difficulty: beginner
Time: 5 min
Read: 3 min

Short answer

Thighs have more fat and connective tissue, so they stay moist over a wide range of cooking times and suit curries, stews, roasting and grilling. Breasts have almost none, so they are excellent when cooked precisely and dry the moment you overshoot.

The two cuts are not interchangeable, and swapping one for the other is behind a great deal of dry chicken. The difference comes down to what each muscle does on the bird.

Step by step

Understand why thighs are forgiving.Leg muscles work constantly, so they carry more fat and more collagen. That collagen melts into gelatine with longer cooking, which keeps the meat moist even at 80°C and above.
Understand why breasts are not.Breast muscle barely works in a farmed bird, so it has almost no fat or collagen. Past about 70°C it just loses water, and there is nothing to compensate.
Use thighs for anything long or uncertain.Curries, stews, tray bakes, slow cooker dishes, barbecue. Anything where the timing is approximate or the cooking is over twenty minutes.
Use breasts for anything fast and controlled.Pan-frying, poaching, schnitzel, salads and sandwiches. A breast cooked to 70°C and rested is excellent — it just gives you no margin.
Match the price to the job.Thighs are usually half the price of breasts and taste of more. For most home dishes they are the better buy as well as the easier one.
Adjust the cooking time when substituting.Boneless thighs need roughly twice as long as breast in a pan and stand up to it. Bone-in thighs need longer still — 35 to 40 minutes at 200°C.
Cook both to at least 75°C.UK food safety guidance for poultry. Thighs are usually better at 80 to 85°C, where the collagen has had time to soften.
Keep the skin on for roasting and grilling.It protects the meat and renders down. Take it off for curries and stews, where it goes flabby and adds nothing.

Tips

If a recipe says breast and you are not confident about timing, use thighs. It is the single easiest upgrade in everyday cooking.
Thighs are the better choice on a barbecue by a wide margin — breasts dry out before the outside is done.
Boneless skinless thighs are the most useful chicken product in a fridge.

Common mistakes

Swapping thighs for breast in a slow-cooked dish without changing anything — Breast in a two-hour curry disintegrates into dry fibres, because it has no collagen to convert and nothing to hold water. Thighs improve over that time; breasts only deteriorate.
Cooking thighs to exactly 75°C and stopping — They are safe there but not at their best — the connective tissue is still tough. Another five to ten degrees and a little more time turns them noticeably more tender.

If it doesn't work

Chicken dry in a curry or stew

Cause: Breast used — Fix: Use thighs. Add breast only in the last ten minutes if you must use it.

Thighs rubbery

Cause: Undercooked for the cut — Fix: Give them longer — thighs want 80 to 85°C internally, not the bare minimum.

Breast dry in a pan

Cause: Cooked past 70°C — Fix: Flatten it to an even thickness, cook to 70°C and rest. A thermometer removes the guesswork.

Skin flabby in a stew

Cause: Skin left on in liquid — Fix: Remove the skin for wet dishes, or brown it separately and add it at the end.

Questions people ask

Are thighs less healthy than breast?

They have more fat and so more calories per gram, but the difference is modest once skinless, and they carry more iron and zinc. For most cooking the practical advantage of not drying out outweighs it.

Can I substitute thighs for breast in any recipe?

Almost always, allowing more cooking time. The reverse is much riskier — breast substituted into a long-cooked dish will be dry however carefully you handle it.