Place chicken thighs with skin facing up in a oiled (using 1 tablespoon of the oil oil) 11x8 baking dish.
Season generously with black pepper.
Bake for 25 minutes, or until the skin begins to crisp.
In a small bowl, mix the dressing seasoning with olive oil, lemon juice and minced garlic.
Brush the ranch and oil mixture over the chicken thighs.
Continue baking until the chicken is crispy, golden brown, and reaches an internal temperature of 165°F. Use an instant-read thermometer to ensure chicken is fully cooked.
For extra crispy skin, broil for 5 minutes, keeping a close eye to prevent burning.