Preheat oven to 250 degrees F. Place one oven rack in the lowest position and one in the highest position. Lightly spray a baking rack on a baking sheet with oil.
Pat wings dry with paper towels. In a large Ziplock bag, toss wings with baking powder and salt until evenly coated.
Arrange wings on the rack, skin side up. Bake on the lower rack for 30 minutes.
Move wings to the top rack, increase heat to 425°F, and bake 40–50 minutes until crispy, rotating the tray once.
While baking, mix buffalo sauce and ranch dipping sauce ingredients.
Toss hot wings in buffalo sauce and serve immediately with ranch.
