Preheat the oven to 400 degrees F and line a baking sheet with parchment paper.
Place the chicken wings in a large bowl and toss them with olive oil, salt, and black pepper until evenly coated.
Spread the wings in a single layer on the prepared baking sheet. Bake for 40 minutes, flipping them halfway through, until the skin is golden and crisp.
While the wings bake, melt the butter in a small saucepan over low heat. Stir in the minced garlic and cook for 1 minute until fragrant. Remove from heat and mix in the chopped parsley.
Transfer the baked wings to a clean large bowl. Pour the garlic butter over them and toss until fully coated.
Serve the wings hot with ranch dressing on the side for dipping.