Start by preheating your oven to 400 degrees Fahrenheit. Line a baking sheet with foil or parchment paper to make cleanup easier, and place a baking rack on top. This allows air to circulate around the wings, helping them get crispy.
Take the chicken wings and drumettes and pat them dry with paper towels. This is a crucial step as it helps the skin to crisp up nicely. Then, place them in a large bowl.
Add the baking powder and kosher salt to the bowl. Toss the wings until they are evenly coated. You'll notice that the baking powder gives them a nice coating.
Arrange the wings on the baking rack, ensuring they’re spaced out and not touching. This is key for achieving that golden crunch all around.
Bake the wings for 30 to 35 minutes. Keep an eye on them; you want them crispy and golden, and ensure the internal temperature reaches 165 degrees Fahrenheit for safety.
While the wings bake, prepare the sauce. In a small saucepan, combine the pineapple juice, rice vinegar, brown sugar, ketchup, and soy sauce. Heat over medium-high, stirring to combine until it simmers.
In a separate small bowl, mix the cornstarch with the water to create a slurry. Once the sauce is simmering, whisk in this slurry and reduce the heat to medium-low. Cook for about 5 minutes until the sauce thickens and feels luxurious.
Once the wings are out of the oven, transfer them to a large heat-safe bowl. Pour about two-thirds of the sauce over the wings and toss them to ensure they’re well coated.
Serve the wings right away, with the extra sauce on the side for dipping. Your guests will be diving in for seconds!