A thawed 2.5 kg (5.5 lb) turkey breast typically needs about 1 hour 45 minutes to 2 hours 15 minutes in a 325°F (163°C) oven, but a thermometer—not the clock—determines when it is done. This recipe roasts a bone-in, skin-on breast with herb butter, lemon, and onion for browned skin and moist slices; allow an additional 20 minutes for resting before carving.
Ingredients
- 1 thawed, bone-in, skin-on turkey breast, about 2.5 kg (5.5 lb)
- 4 tbsp unsalted butter, softened (57 g)
- 1 tbsp olive oil (15 ml)
- 2 tsp fine sea salt (10 g)
- 1 tsp freshly ground black pepper (2 g)
- 1 tbsp fresh thyme leaves, chopped (about 3 g), or 1 tsp dried thyme (about 1 g)
- 2 tsp finely chopped fresh rosemary (about 2 g), or ¾ tsp dried rosemary (about 1 g)
- 4 garlic cloves, finely grated or minced (about 12 g)
- ½ lemon, finely zested, plus 1 lemon, halved (about 170 g total)
- 1 medium yellow onion, cut into thick wedges (about 150 g)
- 1 cup low-sodium chicken or turkey stock (240 ml)
Instructions
- Thaw the turkey safely, if needed. The bird must be completely thawed before roasting for the timing in this recipe to be useful. Thaw it in its original wrapping on a tray in the refrigerator; a large breast can take roughly 24 to 48 hours, depending on its shape and packaging. Do not thaw poultry on the counter. Remove the packaging and any neck or gravy packet from the cavity just before cooking, and pat the skin and cavity dry with paper towels. If the breast is still partly frozen, allow more refrigerator-thawing time rather than relying on the stated roasting estimate.
- Heat the oven and prepare the pan. Set a rack in the centre of the oven and heat it to 325°F (163°C). Arrange the onion wedges and the halved lemon in the bottom of a roasting pan, then pour in the stock. Set a roasting rack over the vegetables if you have one; the turkey can also sit directly on the onion wedges. The raised position lets hot air circulate, while the stock and aromatics catch the drippings and help keep them from scorching.
- Make the herb butter. Stir together the softened butter, olive oil, salt, pepper, thyme, rosemary, garlic, and lemon zest. Gently loosen the skin over the breast meat with your fingers, taking care not to tear it. Spread about two-thirds of the butter mixture under the skin, distributing it across the thickest parts. Rub the rest over the outside. Tucking some butter under the skin seasons the meat directly; butter on the surface helps the skin brown.
- Roast the breast. Place it skin-side up in the pan and roast uncovered. For a 2.5 kg (5.5 lb) bone-in breast, begin checking at about 1 hour 45 minutes; many take close to 2 hours, and a particularly thick one may take up to 2 hours 15 minutes. Oven accuracy, the shape of the breast, and how cold it was going into the oven all affect the timing. If the skin becomes deeply browned before the meat is done, loosely cover the breast with foil. Avoid opening the oven repeatedly, since heat loss can extend the cooking time.
- Check the temperature in the right place. Insert an instant-read thermometer into the thickest part of the breast, approaching from the side if that makes it easier to avoid touching bone. Check more than one thick area; the reading should reach 165°F (74°C). The USDA FSIS safe minimum internal temperature for poultry is 165°F (74°C), checked with a food thermometer. Do not use the color of the juices or the cooking time alone to decide that it is safe. If the meat has not reached the target, continue roasting and check again after 10 to 15 minutes.
- Rest, then carve. Transfer the cooked breast to a cutting board and loosely tent it with foil. Rest for 20 minutes so the juices settle and carving is easier. If the breast is tied, remove the strings. Slice across the grain into even pieces, keeping the knife clear of the breastbone, and spoon a little pan juice over the slices if you like. For gravy, strain the drippings into a small saucepan and make gravy separately; do not assume the roasting liquid has thickened enough on its own.
Tips
- Use a thermometer in the thickest meat. A probe thermometer can stay in the breast during roasting, while an instant-read model is useful for checking several spots near the end. Avoid touching bone because it can give a misleading reading. The time range is a planning guide, not a substitute for the required temperature.
- Start with a fully thawed breast. A partly frozen centre cooks unevenly, so the outer meat can dry out while the middle catches up. If the package is labelled boneless rather than bone-in, do not assume it will take the same amount of time: its shape and density differ, so start checking earlier and use the thermometer to judge doneness.
- Keep the skin dry and protect it from over-browning. Patting the skin dry helps it brown, and leaving the pan uncovered allows moisture to escape. If the skin is already a deep golden brown but the centre is below 165°F (74°C), a loose foil tent slows further browning without stopping the roast.
- Adjust the herbs to what you have. Dried thyme and rosemary work in the amounts listed, though fresh herbs give the butter a brighter, more herbal aroma. If you do not have lemon, use a little orange zest or omit the zest; orange makes the seasoning subtly sweeter, while leaving out citrus gives a more straightforward savoury roast.
Serving Suggestions
Serve the breast warm, carved into slices, with the roasted onion and lemon from the pan if they are still intact. The pan juices make a simple accompaniment, or strain them and whisk into gravy. For a classic roast dinner, pair the turkey with mashed potatoes, roasted carrots or green beans, and a crisp salad to balance the rich meat. Bread rolls or stuffing are useful alongside because they soak up gravy, but serve them in a separate dish rather than packing stuffing into this breast; stuffing inside poultry changes how evenly and safely it cooks.
For a smaller gathering, arrange the slices on a warmed platter and spoon a little juice over them just before serving. Keep extra gravy warm separately so the skin does not soften before it reaches the table. If serving buffet-style, bring out a modest amount at a time and return perishable leftovers to the refrigerator within two hours.
Variations
Garlic and paprika: Add 1 tsp smoked or sweet paprika (about 2 g) to the butter and use ½ tsp less black pepper if you prefer a milder seasoning. Smoked paprika lends a gentle smoky note; sweet paprika mostly changes the color and adds a mild pepper flavor. Check the skin as it browns, since paprika can make it look darker before the meat is finished.
Mustard and herbs: Mix 1 tbsp Dijon mustard (15 g) into the butter and use thyme with a little extra black pepper. The mustard adds a tangy, savoury edge and helps the butter spread, but it does not replace the salt or change the temperature needed for safe cooking.
Orange and sage: Replace the lemon zest with the zest of ½ orange and use 1 tbsp chopped fresh sage (about 2 g) in place of the rosemary. The result is more fragrant and slightly sweeter, a good fit for an autumn meal. Keep the lemon halves in the roasting pan or omit them; either way, use the same thermometer check and resting time.
Boneless turkey breast: The same herb-butter flavours work with a boneless roast, but timing can vary considerably with its thickness, whether it is rolled, and whether it is netted. Follow the package guidance if available, begin checking well before the bone-in estimate, and confirm 165°F (74°C) in the thickest section. Do not remove netting until the roast has rested if the package instructs you to leave it on during cooking.
Storage and Reheating
Refrigerate cooked turkey within two hours of serving. Remove the meat from the bone, divide it into shallow airtight containers, and refrigerate it for 3 to 4 days. Store gravy and turkey separately if possible. For longer storage, freeze well-wrapped portions; they are best used within about 2 to 3 months for quality. Thaw frozen portions in the refrigerator, not on the counter.
For reheating, place sliced turkey in an oven-safe dish with a spoonful or two of stock, gravy, or pan juices, cover it, and heat in a 325°F (163°C) oven until it reaches 165°F (74°C). Check the centre of the portions with a food thermometer. You can also reheat smaller portions in the microwave, covered and turned or stirred as needed for even heating, again checking for 165°F (74°C). Reheat only what you plan to eat, since repeated cooling and warming can dry the meat and makes temperature control harder.
Frequently Asked Questions
How long does a 2.5 kg turkey breast take at 325°F (163°C)?
For a fully thawed, bone-in, skin-on breast, plan on about 1 hour 45 minutes to 2 hours 15 minutes. Thickness and oven performance affect the timing, so begin checking at the early end of that range and continue until the thickest part reaches 165°F (74°C). Add 20 minutes of resting time before carving.
Should I cook turkey breast covered or uncovered?
Roast it uncovered to encourage the skin to brown. If it browns sooner than the meat reaches its safe temperature, lay foil loosely over the top for the rest of the cooking time. A tight cover traps steam and softens the skin, so avoid sealing the pan.
Do I need to baste the turkey breast?
No. Basting is optional and is not needed for the meat to cook safely or stay moist when the breast is properly timed and rested. Opening the oven often to baste lets heat escape and can slow the roast. The butter under the skin and the resting period do more useful work for this recipe.
Can I roast a turkey breast straight from frozen?
This recipe is written for a thawed breast, and the times will not apply to a frozen one. Frozen poultry can cook unevenly, and its packaging or instructions may require a different method. Thaw it in the refrigerator first, following the package instructions where available, then roast and check the thickest part with a thermometer.
Why is my turkey breast dry even though I followed the cooking time?
A clock cannot account for every breast’s thickness or every oven’s temperature. The meat may have gone past 165°F (74°C), or the thermometer may have been placed in a thinner spot while a different area cooked longer. Check the thickest sections carefully, remove the breast once it reaches the safe minimum, and let it rest for 20 minutes before slicing across the grain. Serving the slices with warm pan juices or gravy can help if the finished meat seems a little dry.
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Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes
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