Preheat oven to 250°F and spray a wire baking rack with nonstick spray. Set the rack over a baking sheet covered with aluminum foil. Set aside.
In a large bowl, combine the chicken with the baking powder and salt. Transfer the wings to the rack, in a single layer, with a little space between each one.
2 pounds chicken drumettes and wingettes, 1½ tablespoons baking powder, 1 teaspoon kosher salt
Bake the wings in the preheated oven for 30 minutes.
After 30 minutes, increase the temperature to 425°F and bake for an additional 45-50 minutes or until the chicken is crispy and golden brown.
Remove wings from oven and allow to rest 5 minutes.
Toss in the Homemade Buffalo Sauce and serve immediately garnished with sliced green onions, if desired.
1 cup Buffalo Sauce, Sliced green onion