This slow cooker turkey breast is perfectly seasoned and slow-cooked to tender, juicy perfection. A hassle-free main dish that's ideal for holidays or family dinners.
In a small bowl, combine softened butter, garlic powder, onion powder, smoked paprika, dried thyme, salt, and black pepper to form a herb butter paste.
Pat the turkey breast dry. Carefully loosen the skin and spread half the butter mixture under the skin, and the rest over the top.
Place the onion slices at the bottom of the slow cooker, then place the seasoned turkey breast on top.
Cover and cook on low for 5 to 6 hours, or until the internal temperature reaches 165°F (74°C). Check temperature around 5 hours to avoid overcooking.
Optional: Preheat the broiler. Transfer the turkey to a baking sheet and broil for 3-5 minutes until skin is crispy and golden.
Remove turkey and let rest for 10 minutes before slicing.
To make gravy: strain cooking juices into a bowl, discard solids. Melt butter in a saucepan, whisk in flour, cook 1 minute. Gradually whisk in drippings and chicken broth, cook until thickened (3-5 minutes). Season with salt and pepper.