How Long to Cook Chicken Breast in the Oven (UK)

For boneless chicken breasts weighing about 170–200 g each, allow 20–25 minutes in a preheated UK fan oven at 180°C (350°F), or a conventional oven at 200°C (400°F). The exact time depends on thickness, so check the centre with a food thermometer rather than relying on the clock; this simple recipe seasons the chicken with paprika, garlic and lemon.

Ingredients

2 boneless, skinless chicken breasts, about 6–7 oz (170–200 g) each
1 tbsp olive oil (15 ml)
½ tsp fine salt (3 g)
¼ tsp freshly ground black pepper (about 0.5 g)
1 tsp sweet paprika (about 2 g)
½ tsp garlic powder (about 1.5 g)
1 lemon, cut into wedges, about 5 oz (150 g), for serving

Instructions

Heat the oven and prepare the chicken. Set a fan oven to 180°C (350°F) or a conventional oven to 200°C (400°F), and place a shelf in the middle. Allow the oven to heat fully while you prepare the chicken. Pat the breasts dry with kitchen paper; drying the surface helps the oil and seasoning cling. Do not rinse raw chicken, as splashes can spread germs around the sink and nearby surfaces. If one end of a breast is much thicker than the other, place it between two sheets of baking paper and gently tap the thick end with a rolling pin until the breast is more even, rather than flattening it thin.
Season. Put the chicken in a small roasting tin or ovenproof dish, leaving a little space between the pieces. Drizzle over the olive oil. Mix the salt, pepper, paprika and garlic powder, then rub the mixture over both sides of each breast. A dish just large enough to hold the chicken is preferable to a very wide tray, because it helps catch the juices without crowding the meat.
Bake until cooked through. Place the dish on the middle shelf and roast for about 20–25 minutes. Start checking a thinner breast at 20 minutes; thicker pieces may need 25 minutes or a little longer. Insert a food thermometer into the thickest part, from the side if that makes it easier to reach the centre. The USDA FSIS safe minimum internal temperature for poultry is 165°F (74°C), so cook until the thermometer reads at least that temperature. Avoid touching the dish or measuring only the surface, which can give a misleading reading. If the chicken has not reached the safe temperature, return it to the oven and check again after a few minutes.
Rest and serve. Once it reaches 165°F (74°C), transfer the dish from the oven and let the chicken rest for 5 minutes. This brief rest gives the juices time to settle and makes the breasts easier to slice. Spoon a little of the cooking juice over the top if you like, then serve with lemon wedges. If you are cooking breasts of noticeably different sizes, check each one separately and remove each as soon as it reaches the safe temperature.

Tips

Thickness matters more than the number on the scale. A 200 g breast that is broad and even can cook faster than a smaller one with a thick centre. Use the suggested time as a checking window, not a promise. If you regularly cook chicken, an instant-read thermometer is the most reliable way to avoid both undercooking and leaving the meat in the oven longer than necessary.
Adjust the seasoning to what you have. Smoked paprika gives a deeper, slightly smoky flavour; sweet paprika keeps the taste mild. If you do not have garlic powder, use 1 small finely grated garlic clove (about 3 g), mixed into the oil. Fresh garlic can brown more quickly, so check that it is not darkening during baking.
Keep the chicken in a single layer. Do not stack the breasts or crowd them tightly into a small dish. Crowding can trap steam and make the cooking less even. If doubling the recipe, use a larger tray or two dishes, and check the temperature of every breast because their sizes and positions may vary.
Do not cut into the meat to judge doneness. A cut can let the juices escape, and colour alone is not a dependable safety test. Use a thermometer in the thickest section. Wash your hands, utensils and work surfaces after they have touched raw poultry, and keep ready-to-eat foods separate from the raw chicken.

Serving Suggestions

Serve the chicken whole or slice it across the grain, with the lemon wedges and a spoonful of the juices from the dish. For a familiar UK-style dinner, pair it with roast potatoes, steamed peas or green beans and a simple gravy. New potatoes, boiled rice, couscous or crusty bread are useful alternatives when you want something quick to soak up the juices. A crisp salad of lettuce, cucumber and tomatoes makes a lighter-tasting plate, while roasted carrots, courgettes or broccoli can cook alongside the chicken if there is room on a separate tray.

For a lunch or meal-prep plate, let the chicken cool slightly after resting, then slice it and serve with cooked grains, leafy greens and a yoghurt or mustard dressing. Keep dressing separate until serving so the salad does not become soggy. If serving children or anyone who prefers smaller portions, slice the breast after the rest and check that the centre is fully cooked before plating.

Variations

Lemon and herb: Replace the paprika with 1 tsp dried mixed herbs (about 1 g), and add 1 tsp finely grated lemon zest (about 2 g) to the oil. The flavour is brighter and more herbal, and the method and temperature check stay the same. You can also add a few sprigs of thyme to the dish while the chicken cooks.

Mustard coating: Stir 1 tsp Dijon mustard (5 g) into the olive oil before rubbing it over the chicken. It adds a gentle tang and helps the seasoning adhere. Mustard is salty, so taste the rest of the meal before adding extra salt at the table.

Use boneless chicken thighs: Thighs are generally more forgiving if they cook a little longer, but they do not have exactly the same timing as breasts. Begin checking around 25 minutes at the same oven settings and continue until the thickest part reaches 165°F (74°C). The result will be richer and darker in flavour. Bone-in pieces also take longer, so do not use the breast timings for them; follow the thermometer rather than assuming the same cook time.

Add a simple pan sauce: When the chicken is resting, pour the cooking juices into a small saucepan, add 2 tbsp water or low-salt stock (30 ml) and warm until steaming. Stir in 1 tsp butter (5 g), if desired. Do not serve juices that have been in contact with raw chicken unless they have been thoroughly heated. This quick sauce is optional; the chicken is also good with the juices straight from the baking dish.

Storage and Reheating

Refrigerate cooked chicken within 2 hours of taking it out of the oven. Store it in a covered, shallow container and use it within 3–4 days. If you will not eat it in that time, freeze it in an airtight container or freezer bag, ideally in individual portions; for best quality, use within 2–3 months. Defrost frozen chicken in the refrigerator, not on the counter, and use it promptly once thawed. Keep raw chicken and its juices away from cooked food in the fridge.

To reheat, slice the chicken or leave it whole and warm it covered in a microwave or in an ovenproof dish with a spoonful of water or stock to reduce drying. Heat until the centre reaches 165°F (74°C), the USDA FSIS temperature for reheated leftovers. Check the thickest part with a thermometer, and reheat only the portion you plan to eat. You can also eat safely stored cooked chicken cold, for example in a sandwich or salad, without reheating it.

Frequently Asked Questions

How long does chicken breast take in a UK fan oven?
For boneless breasts around 170–200 g each, allow about 20–25 minutes at 180°C fan (350°F). Thin breasts may be ready sooner, while thick ones can need longer. Check the thickest part with a food thermometer and cook to at least 165°F (74°C), rather than treating any time as exact.

What is the equivalent conventional oven temperature?
Use 200°C (400°F) in a conventional oven for the timing in this recipe. Fan ovens circulate hot air, so their setting is lower. Oven performance varies, and the temperature displayed on a dial does not tell you whether a particular chicken breast has cooked through; the internal temperature is the useful final check.

How long should I cook a thin or thick chicken breast?
A thin breast may take roughly 15–18 minutes at 180°C fan, while a particularly thick breast may take 25–30 minutes or more. These are estimates, not guarantees: starting temperature, shape, tray material and oven calibration all affect the result. Check early, then continue in short intervals until the centre reaches the safe minimum.

Should I cover chicken breast with foil in the oven?
It is not necessary for this recipe. Baking uncovered lets the surface roast and brown lightly. If the outside is browning too quickly before the centre is ready, loosely cover the dish with foil for the remaining cooking time, then check the internal temperature. Foil does not remove the need to cook the chicken fully.

Can I cook chicken breast from frozen?
This recipe is written for thawed chicken breasts. Frozen pieces cook unevenly and need substantially longer, so do not simply add a few minutes to the stated time. For the most predictable result, thaw chicken in the refrigerator before seasoning and baking, then check every breast with a thermometer. Do not thaw it at room temperature.

Why is my baked chicken breast dry?
Chicken breast can become dry if it is left in the oven after it has reached a safe temperature, or if very thin and thick pieces are cooked for the same length of time without checking. Choose breasts of similar thickness, start checking at the early end of the time range and rest them for 5 minutes before slicing. A little oil and a spoonful of the cooking juices also help the finished slices feel less dry.

More recipes to cook

Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes

Spotted an error? Tell us and we will correct it (corrections policy).