Remove turkey from refrigerator 30 minutes before cooking and pat completely dry with paper towels. Combine garlic powder, onion powder, salt, black pepper, paprika, fresh sage, and fresh thyme in a small bowl to create your seasoning blend.

Arrange quartered onions, carrot chunks, and celery pieces across the bottom of a 6-quart slow cooker to create an aromatic base. Layer the vegetables strategically to elevate the turkey slightly so it doesn't sit directly in liquid throughout cooking.

Rub butter over the entire turkey surface, then apply your herb seasoning mixture generously to all sides, paying special attention to the cavity and under the skin where possible. Pour chicken broth and water directly into the slow cooker around—not over—the turkey to maintain crispy skin.

The slow cooker thanksgiving turkey family recipe cooks on low for 8 hours without lifting the lid, creating a sealed environment that locks in moisture and develops incredible flavor. Internal temperature should reach 165°F at the thickest part of the thigh when fully cooked.

Transfer cooked turkey to a cutting board and tent loosely with foil while it rests for 15 minutes before carving. Strain cooking liquid through a fine-mesh sieve and reserve for gravy, skimming excess fat from the surface as desired.

Carve the tender turkey and arrange on a platter surrounded by the roasted vegetables from the slow cooker. Garnish with fresh rosemary sprigs and serve immediately with reserved pan juices for spooning over meat and sides.