Dinner · Part 2 of 3: Instructions
Slow Cooker Maple Mustard Turkey Breast Step-by-step instructions

- Prep
- Cook
- Total
- Serves
- 4
Before you start
Before beginning, ensure the turkey breast is fully defrosted if previously frozen. Have all ingredients measured and ready, and ensure the slow cooker is placed on a level, heat-resistant surface.
Slicing the onions beforehand allows for a quicker assembly, and checking that the slow cooker is clean ensures no interference with the cooking process.
Verify that the internal thermometer is calibrated and ready for testing the final temperature.
Ingredients at a glance (4)
- 1 lb turkey breast, boneless and skinless
- 1 medium yellow onion, sliced
- 1 packet poultry seasoning
- 1/2 cup maple mustard
Instructions
Assembly Phase
- Prepare the Slow CookerPlace the turkey breast into the bottom of the slow cooker. Scatter the sliced yellow onions evenly over the top of the turkey to provide a flavorful bed for the meat as it cooks.Look for Turkey is centered in the base of the slow cooker.Tip Ensure the turkey is fully thawed before placing it in the slow cooker for even cooking.
At the end of this phase, the turkey is nestled at the bottom of the slow cooker with a generous layer of sliced onions on top, creating a solid foundation for the subsequent seasoning and glazing process.
Seasoning Phase
- Season and GlazeSprinkle the poultry seasoning packet generously over the turkey and onions. Pour the maple mustard over the top, ensuring it coats the turkey breast thoroughly to create the signature glaze.Look for The turkey is well-coated with the seasoning and maple mustard mixture.Tip Use a spatula to spread the sauce if it does not cover the meat completely.
The turkey is now coated in the poultry seasoning and the maple mustard glaze. Everything is distributed evenly within the slow cooker, preparing the ingredients for the long, slow cook that will meld the flavors.
Cooking and Resting Phase
- Cook and RestCover the slow cooker and cook on low for 4 hours until the turkey is cooked through. Use a meat thermometer to ensure the turkey reaches an internal temperature of 165°F (74°C). Once finished, remove the turkey to a cutting board and let it rest at least 10 minutes before slicing.Look for The turkey is opaque throughout and the sauce has thickened slightly.Safe temperature 165°F (74°C) internal temperature (poultry)Tip Resting allows the juices to redistribute, ensuring every slice remains moist and tender.
The turkey has reached an internal temperature of 165°F (74°C) and has rested for 10 minutes. The meat is succulent, the glaze is glossy, and the onions have softened into a savory accompaniment.
Common mistakes
A common mistake is failing to let the turkey rest before slicing; resting is essential for retaining moisture. Another error is checking the internal temperature too early, which releases heat from the slow cooker.
Ensure the lid remains closed during the majority of the cooking time. Finally, do not overcrowd the slow cooker, as this can lead to uneven cooking and inconsistent texture throughout the turkey.
How to tell it’s done
The turkey is done when the internal temperature reaches 165°F (74°C) as measured by a meat thermometer in the thickest part of the breast.
The meat should be opaque, firm to the touch, and the juices should run clear. Avoid overcooking, as even in a slow cooker, turkey breast can become fibrous if left for too long beyond the recommended cooking time.
- Poultry: 165°F (74°C) in the thickest part
Up next · Part 3 of 3
2 variations · storage & make-ahead · 3 answers · printable card
Tips, FAQ & printable recipe (Part 3)← Back to the ingredients (Part 1)