Preheat oven to 425°F (218°C) and line a baking sheet with parchment paper or a wire rack.
Pat chicken wings thoroughly dry with paper towels to ensure maximum crispiness.
In a large bowl, toss the wings with baking powder, salt, and black pepper until evenly coated.
Arrange wings in a single layer on the prepared baking sheet and bake for 30 minutes, flipping halfway through, until golden brown and internal temperature reaches 165°F (74°C).
While wings bake, whisk together sour cream, mayonnaise, blue cheese crumbles, lemon juice, and garlic powder in a small bowl. Refrigerate until ready to serve.
In a small saucepan over medium-low heat, melt the butter. Add minced garlic and sauté for 2 minutes until fragrant, being careful not to brown the garlic.
Place the cooked wings in a large clean bowl. Pour the garlic butter over the wings, add the Parmesan cheese and parsley, and toss until every wing is coated.
Serve immediately with the chilled creamy dip on the side.