Open the turkey packaging, drain any liquid, and discard the gravy packet (you won’t need it for this recipe).
Place the turkey breast into your slow cooker, skin side up.
In a small mixing bowl, whisk together the maple syrup, honey, Dijon mustard, balsamic vinegar, salt, and pepper.
Pour the glaze over the turkey breast, making sure it coats the skin generously.
Set your slow cooker to LOW and cook for 6 hours (or HIGH for 3 hours). Use a meat thermometer to ensure the thickest part of the turkey breast reaches 170°F.
Optional: About ⅔ of the way through the cook time, rotate the turkey breast gently to let the glaze soak both sides.
Once done, let the turkey rest for a few minutes before slicing. Serve with the extra cooking liquid drizzled over the top!