A 4kg rolled turkey breast usually takes about 2½ to 3 hours to roast at 325°F (163°C), but its internal temperature—not the clock—is the reliable doneness test. This simple herb-and-garlic version makes tender slices for a holiday meal or a large Sunday dinner, with pan juices for serving.
Ingredients
- 1 rolled, boneless turkey breast, about 4kg (8¾ lb), fully thawed and secured with its netting or kitchen twine
- 2 tbsp (30 ml) olive oil
- 2 tbsp (28 g) unsalted butter, softened
- 2 tsp (12 g) kosher salt, or 1¼ tsp (7 g) fine table salt; use less if the turkey is pre-brined or seasoned
- 1 tsp (2 g) freshly ground black pepper
- 3 garlic cloves (about 9 g), finely grated or minced
- 1 tbsp (3 g) fresh thyme leaves, or 1 tsp (1 g) dried thyme
- 1 tbsp (3 g) chopped fresh rosemary, or 1 tsp (1 g) dried rosemary
- 1 medium yellow onion (about 150 g), cut into wedges
- 1 lemon (about 120 g), cut into quarters
- 1 cup (240 ml) low-sodium chicken or turkey broth, plus more if needed
Instructions
- Thaw and prepare the turkey. If frozen, thaw it in its unopened wrapping on a tray in the refrigerator; an 8¾ lb (4kg) roast generally needs about two to three days, depending on your refrigerator and packaging. Do not roast it while the center is still frozen. Remove the fully thawed turkey from the refrigerator while you heat the oven, but do not leave raw poultry out for an extended period. Take off any outer packaging, but leave the butcher’s netting or ties in place so the roll holds its shape. Check the label for added salt or a brining solution before seasoning.
- Heat the oven and season. Set a rack in the middle of the oven and preheat to 325°F (163°C). Pat the turkey dry with paper towels. In a small bowl, mix the oil, softened butter, salt, pepper, garlic, thyme, and rosemary. Rub the mixture over the entire surface of the roll. If the netting makes an area difficult to reach, spread the seasoning over the exposed parts rather than cutting the netting off before roasting.
- Set up the roasting pan. Scatter the onion and lemon in a roasting pan and place the turkey seam-side down on a rack above them, if you have one. Pour 1 cup (240 ml) broth into the pan beneath the rack. If there is no rack, set the roll directly on the onion wedges; they lift it slightly and help prevent the underside from sitting in the liquid. Keep the broth below the meat rather than pouring it over the seasoned surface.
- Roast until cooked through. Roast uncovered, allowing roughly 2½ to 3 hours as a planning estimate. Start checking the temperature after about 2 hours and 15 minutes; the actual time depends on the roast’s shape, starting temperature, oven accuracy, and whether it is tightly tied. If the pan becomes dry, add a little hot broth or water. If the outside is browning faster than you want, loosely tent it with foil. Insert an instant-read thermometer into the thickest central part of the roll, aiming for the middle of the meat and avoiding the pan or any pocket of air. The USDA FSIS safe minimum internal temperature for all poultry is 165°F (74°C); check the center in more than one spot and continue roasting if any reading is below that temperature.
- Rest, then carve. Transfer the cooked turkey to a clean cutting board and rest it for 20 minutes, loosely covered with foil. Resting gives the juices time to settle and makes the roll easier to slice; it is not a substitute for reaching 165°F (74°C) in the oven. Remove the netting or twine carefully, then cut across the roll into slices about ½ inch (1.25 cm) thick. Spoon a little pan juice over the meat or serve it separately.
Tips
- Use temperature, not a rigid minutes-per-pound rule. A rolled roast is thick, and its shape and packing affect how quickly heat reaches the middle. The 2½-to-3-hour estimate is useful for planning, but begin checking early and let the thermometer make the final call. An oven thermometer can help if your oven runs hot or cool.
- Check whether it is already seasoned. Some commercial turkey rolls are injected with a salt solution or come pre-seasoned. Read the label and reduce or omit the added salt if needed; the oil, herbs, garlic, and pepper still provide plenty of flavor.
- Keep the roll intact while it cooks. Leave the netting or butcher’s twine on during roasting. Removing it too early can let the breast loosen and cook unevenly. Take it off after the resting period, just before slicing.
- Do not stuff the center for this timing. A filling inside a large roll changes how heat travels and can leave the middle undercooked while the outside dries. Serve stuffing or a vegetable side separately, and use a thermometer in the turkey’s thickest section.
Serving Suggestions
Serve the slices hot with the onion-and-lemon pan juices, or strain the juices into a small saucepan and skim off excess fat. For a quick gravy, whisk 1 tbsp (8 g) flour into 1 tbsp (14 g) melted butter in a saucepan, cook for about a minute, then gradually whisk in 1 cup (240 ml) of strained pan juices or broth. Simmer, stirring, until smooth and lightly thickened; season after tasting because the drippings may already be salty.
For a classic roast-dinner plate, pair the turkey with mashed potatoes, roasted carrots, green beans, or Brussels sprouts. Cranberry sauce adds a tart contrast, while a crisp green salad balances a richer spread. Since this is a substantial rolled roast, carve only what you expect to serve at once and keep the remaining meat whole until you are ready to chill it; a larger piece stays juicier than a platter of slices left sitting out.
Variations
Lemon and sage: Replace the thyme and rosemary with 1 tbsp (3 g) finely chopped fresh sage, and add the finely grated zest of the lemon to the butter mixture. Sage has a more savory, earthy flavor, so it works especially well with gravy and roasted root vegetables.
Mustard and herbs: Stir 1 tbsp (15 g) Dijon mustard into the oil-and-butter mixture and keep the rosemary and thyme. The mustard adds a gentle tang and helps the herbs cling to the surface; it will not make the roast taste strongly of mustard.
Orange and rosemary: Use orange quarters in the pan instead of lemon, keeping the rosemary and garlic. The pan juices will have a rounder, slightly sweeter citrus note. This is a flavor change rather than a different cooking method, so use the same oven temperature and thermometer target.
Use dried herbs when fresh are unavailable: The ingredient list gives the approximate conversion. Dried herbs taste more concentrated and less bright, so measure carefully and rub them into the butter mixture. Avoid adding extra broth or changing the cooking temperature to compensate for a different seasoning.
Storage and Reheating
Refrigerate leftover turkey within 2 hours of cooking. For faster cooling, divide large amounts into shallow containers and refrigerate the slices or smaller pieces rather than putting a very large, warm roast into one deep container. Store covered in the refrigerator and use within 3 to 4 days. Keep the pan juices in a separate sealed container and use them within the same period.
For longer storage, freeze portions in airtight freezer-safe containers or well-wrapped freezer bags. For best texture, use frozen cooked turkey within about 2 to 3 months; it remains safe longer if kept continuously frozen, though quality can decline. Thaw it in the refrigerator, not on the counter.
Reheat only the amount you plan to eat. Add a spoonful of broth or reserved pan juice, cover, and warm in a 325°F (163°C) oven until hot throughout, or microwave in a covered dish in short intervals, turning or rearranging the pieces. USDA FSIS guidance is to reheat leftovers to 165°F (74°C); check the center of the thickest portion with a food thermometer. Avoid repeatedly warming and cooling the same batch, as that can dry the meat and makes safe handling harder.
Frequently Asked Questions
How long does a 4kg rolled turkey breast take to cook?
Plan on about 2½ to 3 hours at 325°F (163°C), then allow 20 minutes to rest. The exact time varies with the roll’s shape and your oven, so start checking early and cook until the center reaches 165°F (74°C).
Should I cover the turkey while it roasts?
Roast it uncovered at first so the surface can brown. If it is already deeply golden before the center is cooked, lay foil loosely over the top and continue roasting. Avoid wrapping the pan tightly from the beginning, which can trap steam and soften the outside.
Do I need to baste a rolled turkey breast?
No. Basting is optional, and opening the oven repeatedly can lower its temperature and slow cooking. The butter and oil coating helps season the surface, while the thermometer ensures the center cooks safely. If you want more pan juice, add broth to the roasting pan as needed.
Can I cook the turkey breast from frozen?
For this recipe, thaw it fully in the refrigerator before roasting. A frozen or partly frozen rolled roast will cook unpredictably, and the outside can overcook before the center reaches a safe temperature. Allow roughly two to three days for refrigerator thawing and check that no icy section remains in the middle.
When should I remove the netting?
Keep the netting on while the turkey roasts and rests, then cut it away just before carving. This helps the roll keep its shape. Use kitchen scissors and take care not to pull hot netting across your hands or tear the browned surface.
Can I prepare it ahead?
You can mix the herb butter and refrigerate it in a covered container a day ahead. You can also season the thawed turkey and keep it covered in the refrigerator until roasting, but follow the package’s handling guidance and do not leave raw poultry at room temperature. Allow a chilled roast to go straight from the refrigerator to the oven and rely on the internal temperature rather than adding a fixed amount of time.
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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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