Preheat your oven to 425°F (220°C). Line a baking sheet with aluminum foil and place a wire rack on top. Spray the rack with non-stick cooking spray. Pat the chicken wings dry with paper towels. This step is crucial for getting crispy wings.
In a large bowl, combine the baking powder, garlic powder, salt, and black pepper. Add the wings and toss until they are evenly coated.
Arrange the wings in a single layer on the prepared wire rack. Bake in the preheated oven for 20 minutes. Flip the wings and bake for an additional 20-25 minutes, or until the wings are crispy and golden brown.
While the wings are baking, prepare the sauce. In a small saucepan over medium heat, combine the honey, coconut aminos, rice vinegar, minced garlic, water, grated ginger, sesame oil, and red pepper flakes (if using). Stir and bring the mixture to a simmer.
In a small bowl, mix the water and cornstarch until smooth. Slowly add the cornstarch mixture to the sauce, stirring constantly, until the sauce thickens. This will take around 3-5 minutes to thicken up. Remove from heat and set aside.
Once the wings are done baking, remove them from the oven and let them cool for a few minutes. Place the wings in a large bowl and pour the honey garlic sauce over them. Toss to coat the wings evenly in the sauce.
Transfer the wings to a serving platter. Garnish with sesame seeds and chopped green onions, if desired. Serve immediately and enjoy!