Preheat oven to 425°
Make sure wings are dry, in a small bowl combine baking powder, salt, pepper, and turmeric.
Toss wings with 1/2 turmeric mixture, make sure wings are well coated. Toss with remaining 1/2. Doing this in stages ensures that the baking powder doesn't clump.
Place wings, in a single layer, on a cookie sheet with a rack insert.
Bake 20 minutes, turn. Bake 20 more minutes, turn. Bake 20 more minutes.