Ingredients
Equipment
Method
- Make sure the turkey breast is completely thawed. Remove any giblets or gravy packet from the cavity, then pat the breast very dry all over with paper towels, skin included. Dry skin is the whole reason the broiler finish works later.
- In a small bowl, mash the 6 tablespoons softened butter with the minced garlic, kosher salt, black pepper, paprika, onion powder, chopped thyme, chopped rosemary and sage until it looks like a thick green-flecked paste.
- Slide your fingers under the turkey skin at the top of the breast and loosen it from the meat without tearing it. Push about two thirds of the herb butter directly onto the meat under the skin, spreading it with your fingers from the outside. Rub the remaining third over the outside of the skin and into the underside of the breast.
- Lay the onion slices across the bottom of the slow cooker in a single thick layer, then tuck in the halved garlic head, 6 thyme sprigs and 2 rosemary sprigs. This bed lifts the breast above the liquid so it roasts in steam instead of boiling.
- Set the turkey breast on the onion bed skin-side up. Pour the 1/2 cup broth down the side of the crock, not over the breast, so you do not wash off the butter. Resist adding more liquid.
- Cover and cook on LOW for 5 to 7 hours, undisturbed. Do not lift the lid to peek in the first 4 hours, every look costs you heat. Start checking at 5 hours.
- Insert an instant-read thermometer into the thickest part of the breast, away from the bone. Pull the turkey when it reads 155 to 160 F. Lean turkey breast overcooks fast, so stop here even if it looks pale.
- Heat the broiler. Carefully transfer the breast to a rimmed baking sheet or baking dish, keeping it skin-side up. Broil 6 to 8 inches from the element for 3 to 8 minutes, watching it constantly, until the skin is deep golden and blistered in spots.
- Tent the breast loosely with foil and rest 15 to 20 minutes. Carryover heat will carry it to a safe 165 F and the juices will settle back into the meat.
- While it rests, strain the cooking liquid through a fine-mesh strainer into a measuring cup, pressing the onions to get everything out. Skim off most of the surface fat. You should have roughly 2 cups of concentrated turkey stock.
- Melt the 3 tablespoons butter in a small saucepan over medium heat, whisk in the flour and cook 1 to 2 minutes until it smells toasty. Whisk in the strained juices a little at a time, then simmer 3 to 5 minutes until the gravy coats a spoon. Taste and add salt and pepper as needed.
- Carve the breast off the bone in long slices against the grain, arrange on a warm platter and spoon some gravy over the top. Serve the rest of the gravy at the table.
