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.
Notes
I found 60 minutes was the perfect cook time for my wings. My little sister just tried the recipe and found that her wings were done and crispy at 50 minutes.
After 40 minutes, check your wings, if they are done (a thermometer will read 165°) and looking crispy enough remove them. Cook time will vary slightly depending on the size of your wings.