Pat wings completely dry with paper towels.
Toss wings with baking powder, salt, and pepper until evenly coated.
Place a wire rack on a foil-lined baking sheet. Arrange wings in a single layer.
Refrigerate uncovered for 30 minutes to overnight (optional but recommended).
Preheat oven to 425°F (220°C).
Bake for 45–50 minutes, flipping halfway through, until golden and crispy.
Make lemon pepper butter: combine melted butter, lemon juice, zest, lemon pepper seasoning, and garlic powder.
Transfer hot wings to a large bowl. Pour lemon pepper butter over and toss to coat.
Transfer to serving plate. Garnish with parsley if using. Serve hot.