Remove wrapping, plastic thermometers, and any caging from a fully defrosted turkey. Take the giblets and neck from inside the cavity and save for another use.
The USDA does not recommend rinsing a turkey. However, if you do, rinse using cold water. Pat dry inside and out with paper towels. Make sure to thoroughly clean and sanitize all areas exposed during the rinsing process.
Combine all of the dry brine ingredients in a small bowl and set aside.
Using your hands, gently separate the skin from the meat over the breast area of the turkey. Make sure not to puncture the skin and keep it intact.
Take the brine mixture and rub into the cavity, on the breast meat under the skin, and all over the skin (breasts, legs, wings).
Place in a large sealable plastic bag removing as much air as possible. Refrigerate for 48-72 hours. When about 12 hours or brining time remain, remove from plastic and let sit, uncovered, in a roasting pan in the fridge.