I start by removing the neck, giblets, and any plastic or metal pieces from inside the cavity. Then I pat the entire turkey dry with paper towels, inside and out, which is honestly the most important step.
In a small bowl, I whisk together the kosher salt, baking powder, thyme, sage, pepper, and garlic powder until evenly combined. This only takes about a minute, and I always make a little extra so I don't run short while coating the bird.
Next, I gently loosen the skin over the breast and thighs with my fingers and rub some of the mixture directly onto the meat underneath. Then I coat the outside skin generously and sprinkle a little inside the cavity too, making sure no part of the bird is left bare.
I place the turkey breast-side up on a wire rack set inside a sheet pan and refrigerate it uncovered for 24 to 48 hours. Leaving it uncovered actually helps dry out the skin further, which is the secret to that shatteringly crisp texture later.
About an hour before roasting, I pull the turkey out of the fridge so it isn't ice-cold when it hits the oven. This small step helps the turkey cook more evenly from edge to center.
I tie the legs with kitchen twine, rub the skin with a little oil or butter, and roast at 325°F, basting occasionally, until a thermometer inserted into the thickest part of the thigh reads 165°F. Depending on size, this usually takes between 2.5 and 3.5 hours.
Once it's out of the oven, I always let the turkey rest for at least 30 minutes before slicing. This keeps all those flavorful juices locked inside instead of spilling onto the cutting board.