Preheat oven to 250°F. And place on rack at the lowest setting, and one near the top.
Use a paper towel to pat the totally defrosted wings dry. This will not work with frozen wings.
Place wings in a large bowl or in a ziplock bag. Add the baking powder and salt and pepper, and toss to coat evenly. Note: Some have complained the wings are too salty, adjust to preference, but remember salt is needed to help dry out the skin and get crispy wings.
Line a tray with foil, and set a wire rack inside the rimmed baking sheets.
Brush rack with vegetable oil, or spray with cooking oil. Place the wings on the baking tray in a single layer with the skin side up. It will be a tight fit, use two sheets if needed. Make sure wings don't touch, You need space for air to get around them.
Brush wings with remaining oil. Or spray with cooking spray
Bake wings at 250 F. for 30 minutes at the lowest oven rack setting, this will help to help render the fat.
After 30 minutes, increase temperature to 400 degrees F., and move wings up to the top of the oven. Bake an additional 45-50 minutes until cooked through and skin is crispy, and wings are golden brown. Optional: Flip once during baking
Once baked, remove wings from pan, and toss in a bowl with 1/4 cup - 1/2 cup sauce of choice to coat wings.
Return to baking sheet rack, bake for 5-6 minutes until glaze is lightly caramelized.