Preheat your oven to 120C/250F (fan) and place a rack on a large baking tray.
Cut each chicken wing at the joint to separate the mini wing and drumette.
Pat the wings dry with paper towels and transfer them to a large bowl.
Add baking powder, salt, and pepper to the bowl with the wings. Toss to ensure even coating. Note: Make sure the wings are dry before adding the coating.
Arrange the wings in a single layer on the rack, skin side up. It's okay if they're touching.
After 30 minutes, increase the oven temperature to 220C/425F (fan) and rotate the tray for even cooking.
Continue baking for an additional 45-50 minutes until the wings are golden and crispy.
Remove from the oven and allow to cool slightly before serving.