Preheat the oven to 425°F. Line a large baking sheet with parchment paper. Set aside.
Combine the salt, black pepper, white pepper, onion powder, garlic powder, smoked paprika, rosemary and baking powder in a small bowl.
Pat the chicken wings dry with paper towels – it's important to dry them extremely well. Place the wings in a large mixing bowl. Sprinkle the spice mixture over the wings, tossing to evenly coat. Arrange the wings onto the prepared baking sheet.
Bake for 1 hour at 425°F, flipping every 20 minutes. Then, keeping the chicken wings in the oven, increase the temperature to 450°F and bake for an additional 5 minutes, flipping halfway through until the wings are crispy and browned. Remove from the oven and let cool for 5 minutes.
While the wings bake, make the ranch dressing. Whisk or blend together the ingredients for the dressing starting with 3 Tablespoons of buttermilk. Check the consistency – if it's too thick for your liking, add the additional 1 Tablespoon of buttermilk. Cover and place in the refrigerator until ready to use.
Serve the wings with ranch dressing, celery and carrots.
