Pat the chicken wings dry with a paper towel and place them in a large mixing bowl. Mix the salt and baking powder. Toss the dried chicken wings in this mixture until evenly coated.
Line a sheet pan with parchment paper, then top it with a sheet pan rack. Place the wings on the sheet pan rack and refrigerate for at least an hour and up to 8 hours.
Place an oven rack in the center of your oven and preheat the oven to 300°F. Remove the wings from the fridge and pat them dry a second time. Place them in a large mixing bowl. Mix the cornstarch, garlic powder, smoked paprika, onion powder, and black pepper. Toss the wings in this mixture.
Clean the sheet pan rack and set it over the sheet pan. Arrange the wings in a single layer, ensuring they aren't on top of each other so they cook evenly. Bake the wings for 12 minutes. Flip the wings over and bake for an additional 12 minutes. Remove the wings from the oven and raise the temperature to 450°F.
Remove the wings from the sheet pan rack and clean the sheet pan rack. Add 1/4 cup of the BBQ Sauce to a large mixing bowl and toss half of the wings in it. Place the sauced wings on the clean sheet pan rack. Toss the remaining 1/4 cup sauce with the last of the wings and place on the rack.
Place the BBQ Wings in the 450°F oven for 10 to 12 minutes until the sauce has become glossy and dark, with char spots.
Once the wings have started to develop some charring and have reached an internal temperature of 165°F, pull them from the oven. Serve with your favorite sauces and don't be shy about licking your fingers clean!