
Enjoy a perfectly tender and flavorful turkey breast without the stress of roasting a whole bird. This slow cooker method infuses the meat with aromatic garlic and fresh herbs, finished under the broiler for irresistibly crispy skin.
Prepare the Garlic Herb Butter: In a small bowl, combine the softened unsalted butter, four minced garlic cloves, and one tablespoon each of finely chopped fresh sage, rosemary, thyme, and parsley. Mix until well combined.
Prep the Turkey: Pat the turkey breast dry with paper towels. Carefully loosen the skin from the meat by sliding a tablespoon between the flesh and skin, creating a pocket for the butter without tearing the skin.
Apply the Butter: Slather about two-thirds of the herb butter mixture directly under the skin. Rub the remaining butter over the entire outer surface and the underside of the breast.
Season: Generously sprinkle the turkey with 1/2 teaspoon each of salt and black pepper. At this stage, you can refrigerate the turkey overnight for deeper flavor or proceed immediately to cooking.
Set up the Slow Cooker: Place the halved onion and the head of garlic (cut in half horizontally) at the bottom of a 5-quart slow cooker to act as a trivet. Place the turkey on top, skin-side up, and top with the fresh rosemary and thyme sprigs.
Slow Cook: Cover and cook on low for 6 hours. Start checking the internal temperature at 4 hours; the turkey is done when it reaches 165°F (75°C) in the thickest part.
Rest the Meat: Carefully transfer the turkey to a baking tray and reserve the juices in the slow cooker. Cover the turkey loosely with foil and let it rest for 20 minutes to ensure juiciness.
Crisp the Skin: Remove the herb sprigs and drizzle the turkey with a little oil. Place under a broiler on high for 5 to 10 minutes, watching closely, until the skin is golden brown and crispy.
Prepare the Gravy Base: Strain the slow cooker juices into a bowl, pressing on the onion and garlic to extract all the flavor. If you have less than 3 cups of liquid, top it up with store-bought chicken broth.
Degrease: Allow the liquid to settle for a few minutes, then spoon off about 1/4 cup of the fat/butter from the surface.
Thicken the Gravy: Place the reserved fat in a saucepan over medium heat. Once it bubbles, whisk in the flour and cook for 1 minute. Gradually whisk in the remaining slow cooker juices.
Simmer: Simmer the gravy for 3 to 5 minutes, whisking constantly, until it is smooth and thickened. Stir in the dark soy sauce for color, then add salt and pepper to taste. Serve alongside the sliced turkey.
For the best results, always use a meat thermometer to avoid overcooking the breast. If you are using a smaller turkey breast, reduce the cooking time accordingly. The dark soy sauce in the gravy is primarily for a rich, deep color and can be omitted if preferred.
