Introduction
For a classic American family meal, cook a thawed, boneless turkey breast in a slow cooker on LOW for about 4 to 7 hours, depending on its size and shape. The turkey is ready when the thickest part reaches 165°F, measured with a food thermometer.
This method keeps turkey breast moist with little hands-on work. Add broth, herbs, and aromatics for flavor, then let the slow cooker do the work while you prepare mashed potatoes, green beans, or cranberry sauce.
What You Need
A simple slow cooker turkey breast needs only a few ingredients and tools.
Ingredients
For a 2- to 6-pound boneless turkey breast, gather:
- 1 boneless, skinless turkey breast roast
- 1 cup low-sodium chicken or turkey broth
- 1 tablespoon olive oil or melted butter
- 1 teaspoon kosher salt
- ½ teaspoon black pepper
- 1 teaspoon garlic powder
- 1 teaspoon dried thyme
- 1 teaspoon dried sage
- ½ teaspoon dried rosemary
- 1 small onion, sliced
- 2 garlic cloves, crushed
- 2 carrots or celery stalks, cut into large pieces
You can use a plain turkey breast or one that comes already seasoned. If the package says the turkey contains a salt solution, reduce or skip the added salt.
Equipment
You will need:
- A slow cooker large enough for the turkey to sit without being tightly pressed against the lid
- An instant-read or leave-in food thermometer
- Tongs or large serving forks
- A cutting board
- Aluminum foil for resting the cooked turkey
Remove any plastic wrapping before cooking. Leave oven-safe netting in place only if the package instructs you to do so. Remove ordinary plastic packaging and absorbent pads.
How to Prepare the Turkey Breast
Thaw the turkey safely
Thaw the turkey breast in the refrigerator before placing it in the slow cooker. A frozen turkey breast may not heat safely or evenly in a slow cooker.
Place the wrapped turkey on a tray to catch drips. Keep the refrigerator at 40°F or below. A large boneless breast may need one to two days to thaw fully.
For faster thawing, use the cold-water method:
- Keep the turkey in a leakproof package.
- Submerge it in cold tap water.
- Change the water every 30 minutes.
- Cook the turkey as soon as it thaws.
Do not thaw turkey on the kitchen counter. Also, do not wash raw turkey. Rinsing can spread raw poultry juices around the sink and nearby surfaces.
Season the turkey
Pat the turkey dry with paper towels. Rub it with olive oil or melted butter, then coat it with the salt, pepper, garlic powder, thyme, sage, and rosemary.
If time allows, season the turkey several hours before cooking and keep it covered in the refrigerator. This can improve flavor, but it is not required.
Add flavor to the slow cooker
Place the sliced onion, carrots, celery, and garlic in the bottom of the slow cooker. Pour in the broth.
Set the turkey breast on top of the vegetables. The turkey does not need to be covered with liquid. Too much liquid can dilute the seasoning and make the surface soft rather than lightly browned.
How to Cook a Boneless Turkey Breast in a Slow Cooker
Follow these steps for a tender slow cooker turkey breast.
- Place the seasoned turkey in the slow cooker. Set it on top of the vegetables, with the smooth side facing up.
- Add the broth. Pour 1 cup of broth around the turkey, not directly over the seasoning.
- Cover the slow cooker. Keep the lid closed during cooking. Each time you lift the lid, heat escapes and cooking takes longer.
- Cook on LOW. Begin checking the turkey’s temperature near the early end of the estimated cooking range.
- Check the thickest part. Insert the thermometer into the center of the thickest section. Avoid touching the slow cooker insert or any bone, if the roast contains a small bone.
- Continue cooking until 165°F. This is the safe minimum internal temperature for turkey, according to the U.S. Department of Agriculture.
- Rest before slicing. Transfer the turkey to a cutting board, cover it loosely with foil, and rest it for about 15 minutes.
- Slice across the grain. Use a sharp knife and cut the turkey into even slices.
The turkey may be fully cooked before the top develops much color. Slow cookers create moist heat, not the dry heat needed for browning. If you want a browned surface, place the cooked turkey under a broiler for a few minutes, but watch it closely.
Estimated slow cooker times
Cooking time is an estimate, not a safety test. The turkey’s internal temperature decides when it is done.
| Turkey breast size | LOW cooking estimate | Temperature check |
|---|---|---|
| 2 to 3 pounds | 4 to 5 hours | Start checking around 4 hours |
| 3 to 4 pounds | 5 to 6 hours | Start checking around 5 hours |
| 4 to 6 pounds | 6 to 7 hours | Start checking around 6 hours |
These times can vary. A thick, compact roast may take longer than a wide, flat roast of the same weight. The slow cooker model, starting temperature, lid fit, and amount of food in the cooker also affect the result.
Should you cook it on LOW or HIGH?
Use the LOW setting when possible. It gives the turkey more time to cook gently and may help it stay moist.
The HIGH setting can work in some slow cookers, but cooking time varies more from one appliance to another. If you use HIGH, check the temperature early and do not rely on a fixed time.
Do not use a slow cooker to keep raw turkey warm while it slowly begins to cook. Start with fully thawed turkey and a properly heated slow cooker.
How to Keep Slow Cooker Turkey Breast Moist
Turkey breast is lean, so it can become dry if it cooks too long. These steps help protect its texture:
- Do not overcook it. Remove the turkey when the thickest part reaches 165°F.
- Use a thermometer. Time alone cannot show whether the center is safe or overcooked.
- Add a small amount of broth. One cup creates moisture without submerging the turkey.
- Keep the lid closed. Avoid checking the turkey again and again.
- Rest the meat. Resting gives the juices time to settle before slicing.
- Slice only what you plan to serve. Keep the remaining turkey whole for better moisture retention.
- Serve with gravy or pan juices. This can improve the texture of lean slices.
You can also place a few pats of butter under the skin if your turkey breast has skin. For a skinless roast, a light coating of oil or butter helps the seasoning adhere but does not prevent overcooking.
Is brining necessary?
No. Brining is optional.
A wet brine can add moisture and salt, but it takes extra refrigerator space and preparation. A dry brine is simpler: season the turkey with salt and herbs, then refrigerate it uncovered or loosely covered for several hours.
Check the label first. Turkey labeled “enhanced,” “self-basting,” or “contains up to” a certain percentage of a solution may already contain added salt. Brining such a turkey can make it too salty.
How to Make Gravy From the Slow Cooker Juices
The broth and turkey juices can form the base of a simple gravy.
- Remove the turkey and vegetables from the slow cooker.
- Pour the liquid through a fine-mesh strainer into a measuring cup.
- Skim off excess fat if desired.
- Measure 2 cups of the liquid.
- In a saucepan, melt 2 tablespoons of butter.
- Whisk in 2 tablespoons of all-purpose flour.
- Cook the flour mixture for about 1 minute.
- Slowly whisk in the warm cooking liquid.
- Simmer until thickened, stirring often.
- Taste before adding salt.
If you have less than 2 cups of liquid, add additional low-sodium broth. If the gravy is too thick, whisk in more broth. If it is too thin, simmer it longer or add a small amount of cornstarch slurry.
To make a cornstarch slurry, mix 1 tablespoon of cornstarch with 1 tablespoon of cold water. Whisk it into the simmering liquid and cook until thick.
Do not taste the liquid before it has been heated thoroughly. Raw turkey juices may contain harmful bacteria.
How to Tell When the Turkey Is Done
The only dependable way to confirm that a boneless turkey breast is safe is to measure its internal temperature.
Insert the thermometer into the thickest part of the roast. If the turkey has an uneven shape, check more than one location. The lowest reading matters.
The turkey should reach 165°F. Color is not a reliable test. A fully cooked turkey can remain slightly pink near the center, while an overcooked turkey can look white before it reaches a safe temperature.
A pop-up timer is not a substitute for a food thermometer. If the thermometer reads less than 165°F, replace the lid and continue cooking. Check again after 15 to 20 minutes.
What if the turkey is done too early?
If the turkey reaches 165°F well before serving, remove it from the slow cooker. Rest it briefly, then keep it warm in a covered dish with a small amount of hot broth or pan juice.
Do not leave cooked turkey at room temperature for more than 2 hours. If the room is above 90°F, refrigerate it within 1 hour.
What if the turkey is still undercooked?
If the turkey is below 165°F:
- Keep it in the slow cooker.
- Replace the lid.
- Continue cooking on LOW or HIGH, depending on how much time remains.
- Check the thickest part again with a clean thermometer.
- Continue until every tested area reaches 165°F.
Do not slice the turkey and serve it while the center is under 165°F. Cutting it open can also release juices and make the meat dry before it finishes cooking.
Common Mistakes to Avoid
Starting with frozen turkey
A slow cooker is not the right tool for safely thawing and cooking a frozen turkey breast. Thaw the meat first in the refrigerator or cold water.
Filling the slow cooker too tightly
The turkey should fit comfortably with the lid closed. If the roast is wedged against the lid, heat may not circulate well.
Adding too much broth
Turkey does not need to float. Excess liquid can weaken the flavor and produce a soft exterior.
Relying only on the clock
Cooking times are useful for planning, but they cannot account for every slow cooker or roast shape. Use time as a guide and temperature as the final check.
Cooking the turkey for hours after it reaches 165°F
A slow cooker can keep cooking the meat after it reaches a safe temperature. Leaving turkey on LOW for much longer than needed can make it stringy and dry.
Leaving the netting on without checking the label
Some turkey roasts use oven-safe netting. Others have plastic packaging that must be removed. Follow the package directions.
Using the wrong serving temperature
Keep cooked turkey at 140°F or above when holding it hot. Refrigerate leftovers promptly in shallow containers so they cool quickly.
How to Store and Reheat Leftover Turkey
Refrigerate leftover turkey within 2 hours of cooking. Store it in shallow, airtight containers and use it within 3 to 4 days.
For longer storage, freeze sliced turkey in airtight freezer bags or containers. Remove as much air as possible and label the package with the date.
Reheat turkey until it reaches 165°F. Add a little broth or gravy to the container to reduce dryness. Reheat only the amount you plan to eat, since repeated heating can lower quality.
You can use leftover turkey in:
- Sandwiches
- Turkey soup
- Turkey pot pie
- Salads
- Tacos
- Rice bowls
- Turkey and gravy over mashed potatoes
Simple Slow Cooker Turkey Breast Recipe
Ingredients
- 1 thawed boneless turkey breast, 2 to 6 pounds
- 1 cup low-sodium chicken or turkey broth
- 1 tablespoon olive oil or melted butter
- 1 teaspoon kosher salt, adjusted for pre-seasoned turkey
- ½ teaspoon black pepper
- 1 teaspoon garlic powder
- 1 teaspoon dried thyme
- 1 teaspoon dried sage
- ½ teaspoon dried rosemary
- 1 small sliced onion
Directions
- Pat the thawed turkey dry.
- Rub it with oil or melted butter.
- Mix the salt, pepper, garlic powder, thyme, sage, and rosemary. Rub the mixture over the turkey.
- Add the onion to the slow cooker.
- Pour in the broth.
- Place the turkey on top of the onion.
- Cover and cook on LOW.
- Begin checking the temperature according to the size of the roast.
- Remove the turkey when the thickest part reaches 165°F.
- Rest for about 15 minutes.
- Slice across the grain and serve with the cooking juices or gravy.
The most useful next step is to check the turkey package for its exact weight and whether it already contains added salt. That information determines the best cooking estimate and seasoning amount.
Frequently Asked Questions
Can I put a turkey breast directly in the slow cooker?
Yes. Place the thawed, seasoned turkey breast on top of the vegetables or directly in the slow cooker insert. Add about 1 cup of broth around it. The turkey does not need to be covered.
Can I cook a boneless turkey breast overnight?
It is usually better to cook it while you can monitor the time and temperature. Overnight cooking may leave a small turkey breast on heat too long, which can make it dry. Use a programmable appliance only according to its manufacturer’s instructions, and confirm that the turkey reaches 165°F.
Do I need to sear the turkey first?
No. Searing is optional. It can add browned flavor, but it does not replace slow cooking or the 165°F safety check. For extra browning, sear the turkey in a skillet before placing it in the slow cooker.
Can I cook stuffing inside the turkey breast?
Do not stuff a boneless turkey breast in the slow cooker. Stuffing packed inside poultry can heat slowly. Cook stuffing separately and check that it reaches 165°F.
Why is my slow cooker turkey breast tough?
The most common reason is overcooking. Turkey breast is lean and becomes firm when it stays on heat too long. Other causes include slicing it immediately, using a roast that is already heavily processed, or cooking a very small roast for a long time.
Can I cook vegetables with the turkey?
Yes. Onion, carrots, celery, garlic, and potatoes can cook with the turkey. Cut dense vegetables into similar-size pieces and place them under or around the roast. Very large potatoes may remain firm, so cut them into smaller chunks.
Conclusion
The best way to cook a boneless turkey breast in a slow cooker is to start with a thawed roast, season it well, add a small amount of broth, and cook it on LOW until the thickest part reaches 165°F. Rest the turkey before slicing, then use the cooking juices for gravy.
Use the cooking time only as a planning guide. The thermometer is the final authority for both safety and doneness.