Preheat the oven to 425℉ and line a rimmed baking sheet with foil or parchment paper. Place a wire rack on top. In a large mixing bowl, whisk together the baking powder and seasonings. Add the chicken wings and toss to coat each wing thoroughly. Spread the chicken wings out evenly onto the wire rack and bake for 40 minutes, flipping halfway through.
1 tablespoon aluminum-free baking powder, ½ teaspoon garlic powder, ½ teaspoon black pepper, ¼ teaspoon kosher salt, 2 ½ pounds chicken wings
While cooking the chicken wings, combine the soy sauce, 2 tablespoons of water, sugar, vinegar, sesame oil, and garlic in a small saucepan over medium-low heat. Bring the sauce to a gentle simmer.
¼ cup low-sodium soy sauce, 2 tablespoons + 1 tablespoon water, 2 tablespoons brown sugar, 1 tablespoon rice wine vinegar, ½ tablespoon sesame oil, 2 cloves garlic
In a small mixing bowl, whisk together the remaining tablespoon of water with the cornstarch to make a slurry. Slowly whisk the cornstarch slurry into the simmering soy garlic sauce to thicken. Remove from heat.
½ tablespoon cornstarch, 2 tablespoons + 1 tablespoon water
Transfer the cooked chicken wings to a clean mixing bowl. Drizzle the soy garlic sauce over the chicken wings and toss to coat completely. Serve immediately.