1-Thoroughly pat chicken wings dry with paper towels. Separate whole wings into wingette (flat) and drumette, discarding the tip.

2-Place wings in a zip lock bag with baking powder and salt, mixing well to coat evenly.

3-Lightly oil a wire rack and place it on a foil-lined baking tray. Arrange the wings skin side up on the rack with space between.

4-Bake at 250°F (120°C) on the lower-middle oven rack for 30 minutes to render the fat without fully cooking the wings.

5-Remove wings from the oven, rotate the tray, move it to a middle-higher rack, increase the temperature to 430°F (220°C), and bake for 40 45 minutes until the wings are golden and crispy. Rotate the tray halfway through baking to ensure even cooking and monitor to avoid burning.

6-While wings bake, combine brown sugar, apple cider vinegar, ketchup, and pineapple juice in a small pot over medium heat. Stir until blended.

7-In a separate cup, mix soy sauce with cornstarch until smooth. Add this mixture to the pot and stir rapidly over heat until the sauce thickens. Remove from heat and adjust the sweetness or acidity to taste.

8-After the wings are cooked, let them rest a few minutes, then toss them in the sweet and sour sauce.

9-Serve garnished with sesame seeds and finely diced green or spring onions.