How Long to Cook a Turkey Breast in an Oven Bag at 350°F

A 5-pound turkey breast in an oven bag usually takes about 1 hour 30 minutes to 2 hours at 350°F (177°C), but the thermometer—not the clock—determines when it is done. The bag helps hold in moisture and makes cleanup easier; season the breast simply, roast it with aromatics, then rest it before carving.

Ingredients

1 thawed, bone-in, skin-on turkey breast, about 5 lb (2.3 kg)
1 tbsp (8 g) all-purpose flour, for the oven bag
2 tbsp (28 g) unsalted butter, softened
1½ tsp (9 g) kosher salt
½ tsp (1 g) freshly ground black pepper
1 tsp (2 g) dried thyme
½ tsp (1 g) dried rubbed sage
1 medium yellow onion, about 6 oz (170 g), cut into wedges
2 celery ribs, about 4 oz (115 g), cut into 3-inch pieces
½ cup (120 ml) low-sodium chicken broth or water
1 large turkey-size oven bag and its included closure

Instructions

Thaw safely and prepare the oven. If frozen, thaw the turkey breast in the refrigerator before cooking; a 5-pound breast may need about 1 to 2 days, depending on its shape and your refrigerator. Remove the outer packaging and any neck or giblet packet, if present. Heat the oven to 350°F (177°C), with a rack in the lower-middle position. Pat the turkey dry with paper towels. Do not rinse raw poultry, since splashes can spread germs around the sink.
Season the breast. Stir together the salt, pepper, thyme, and sage. Rub the softened butter over the skin and, where you can reach it, beneath the skin without tearing it. Sprinkle the seasoning evenly over the turkey. If the breast is labeled kosher, self-basting, or enhanced with a salt solution, use about half the salt or omit it because those products are already salted.
Set up the oven bag. Put the tablespoon of flour in a large oven bag, close the opening, and shake to coat the inside. This flour helps absorb moisture and is part of the bag maker’s directions; do not skip it unless the specific bag instructions say otherwise. Set the bag in a sturdy roasting pan at least 2 inches deep, with the opening facing the end of the pan. Add the onion, celery, and broth inside the bag, spreading them into a bed.
Add the turkey and seal. Place the breast in the bag, skin-side up, with the vegetables around it rather than packed tightly on top. Close the bag with the supplied tie, leaving room for air to circulate around the turkey. Cut six ½-inch (1 cm) slits in the top of the bag to vent steam. Keep the bag away from oven walls, racks, and heating elements, and do not use it under a broiler.
Roast and begin checking early. Put the pan in the preheated oven and roast for approximately 1 hour 45 minutes for a 5-pound breast. Start checking at about 1 hour 25 minutes because breast shape, starting temperature, oven accuracy, and whether the cut is bone-in all affect the timing. If it is not ready, continue roasting and check again every 10 to 15 minutes. Avoid opening the bag repeatedly; use the thermometer through a slit or carefully open the bag near the end.
Check the temperature accurately. Insert an instant-read food thermometer into the thickest part of the breast, avoiding the bone, and check more than one spot. The USDA FSIS safe minimum internal temperature for poultry is 165°F (74°C); cook until the coolest reading reaches that temperature. Color and clear-looking juices are not reliable substitutes for a thermometer. If one area is below 165°F (74°C), return the turkey to the oven and check again after a short interval.
Rest before carving. Once the breast reaches 165°F (74°C), remove the pan from the oven and let it stand for 20 minutes. Carefully open the bag away from your face because the escaping steam can burn. Transfer the turkey to a carving board; strain the liquid into a heat-safe container if you want to make gravy. Resting gives the juices time to settle and makes the meat easier to slice.
Carve and serve. Cut the breast meat away from the breastbone, then slice it across the grain into even pieces. Arrange the slices on a warm platter and spoon a little pan liquid over them if desired. Serve promptly, and keep the remaining turkey out of the room-temperature range for no more than 2 hours.

Tips

Use the bag’s instructions as well as this timing guide. Oven-bag sizes and directions can differ. Choose a bag labeled for turkey or large poultry, use the supplied tie, and follow its instructions for flour, vent slits, pan depth, and oven use. Never substitute an ordinary plastic roasting or storage bag.
Plan for a range, not an exact finish time. A compact, thick breast may take longer than a flatter one of the same weight. The estimate is a planning aid, while 165°F (74°C) in the thickest parts is the doneness target. If dinner has a fixed serving time, start early enough to allow extra roasting and resting.
Keep the skin from steaming against the bag. Position the turkey skin-side up and make sure the bag is not pressed against the skin. The meat will be moist, but the skin may be softer than skin roasted uncovered. For more browning, carefully cut open the bag near the end and let the turkey roast uncovered for a few minutes, watching closely; do not use the broiler with the bag in place.
Make simple substitutions thoughtfully. Water works in place of chicken broth, although the pan liquid will be less savory. Fresh thyme or sage can replace dried herbs: use about 1 tbsp (3 g) chopped fresh thyme and 1½ tsp (about 2 g) chopped fresh sage. A little lemon zest can add brightness without changing the cooking time.

Serving Suggestions

Serve the sliced turkey with mashed potatoes, roasted carrots, green beans, or a crisp salad. The onion, celery, and savory juices in the bag make a useful starting point for gravy: strain the liquid, skim off excess fat, and heat it in a saucepan. For a thicker gravy, whisk 1 tbsp (8 g) flour or cornstarch with 1 tbsp (15 ml) cold water until smooth, then stir the slurry gradually into about 1 cup (240 ml) of hot pan liquid and simmer until thickened. Taste before adding salt, especially if the turkey was enhanced or seasoned.

This breast is also practical for a smaller holiday meal or a Sunday dinner when a whole turkey would be too much. If serving buffet-style, keep the slices hot in a covered dish and replenish the platter in smaller batches rather than leaving all the meat out for an extended period.

Variations

Garlic and herb: Add 2 minced garlic cloves (about 6 g) to the softened butter and use rosemary in place of sage. Fresh rosemary is assertive, so start with 1 tsp (about 1 g) finely chopped leaves.

Citrus: Add the zest of 1 lemon (about 2 tsp / 4 g) to the butter and tuck a few lemon wedges into the bag beside the vegetables. The citrus perfumes the pan liquid; it will not make the meat cook faster.

Boneless breast: A boneless breast can be cooked in an appropriately sized oven bag, but its shape and netting affect the timing. Use the package directions to estimate when to start checking, then rely on a thermometer in the thickest part and cook to 165°F (74°C). Keep butcher’s netting on only if its packaging says it is oven-safe.

Lower-sodium seasoning: Use unsalted butter and reduce or omit the added salt, then season the carved meat or gravy to taste. This is especially useful when the broth or turkey contains added salt; it changes seasoning, not the cooking method.

Storage and Reheating

Refrigerate leftover turkey within 2 hours of cooking, sooner if the room is very warm. Remove the meat from the bones, divide it into shallow airtight containers, and refrigerate for 3 to 4 days. Store pan juices separately, and do not leave the turkey cooling on the counter for an extended period. For longer storage, freeze the meat in a freezer-safe container or tightly wrapped portions; use within about 2 to 3 months for best quality, and thaw it in the refrigerator.

Reheat only the portion you plan to eat. Add a spoonful of broth or pan juice, cover, and warm in a 325°F (163°C) oven or microwave until the thickest pieces reach 165°F (74°C), checking with a food thermometer. Reheating time depends on portion size and equipment. Avoid repeated cooling and reheating; return unused portions to the refrigerator promptly.

Frequently Asked Questions

How long does a 5-pound turkey breast take in an oven bag?

At 350°F (177°C), plan on roughly 1½ to 2 hours for a thawed 5-pound breast, with about 1 hour 45 minutes as a starting estimate. Shape and oven differences can shift the timing, so begin checking early and finish only when the thickest meat reaches 165°F (74°C).

Should I cook a turkey breast at 325°F or 350°F in an oven bag?

This recipe uses 350°F (177°C), a common oven-bag temperature that gives a practical roasting time. If your bag manufacturer specifies a different temperature, follow its directions. Whichever temperature you use, check the turkey with a thermometer rather than relying on a time chart alone.

Do I need to add liquid to the oven bag?

A small amount, such as the ½ cup (120 ml) broth in this recipe, adds flavor to the vegetables and creates liquid for gravy. The bag traps moisture, so the turkey does not need to be submerged. Do not add extra liquid unless the bag instructions call for it.

Can I put stuffing inside the turkey breast?

It is better to cook stuffing separately for this recipe. Stuffing inside a breast can heat unevenly, and it would need to reach 165°F (74°C) in its center as well as the poultry. Baking it in a separate covered dish makes both the timing and temperature checks simpler.

Can I brown the turkey skin after using the bag?

The skin may remain softer because the bag holds steam. For a little more color, open the bag carefully during the final few minutes and roast the breast uncovered, keeping it in the regular oven setting. Do not put an oven bag under the broiler, and do not leave the turkey unattended while the skin browns.

Can I cook a frozen turkey breast in the oven bag?

Thaw it safely in the refrigerator before following this recipe. A frozen breast has an unpredictable cooking time, and the outside can overcook before the center is ready. Do not thaw poultry on the counter; if using a different safe thawing method, keep the turkey cold and cook it promptly once thawed.

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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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