Preheat the oven to 400°F (200°C) and lightly spray a baking dish with avocado oil
Slice each chicken breast in half to make thin fillets and pat dry with paper towels
Mix salt, pepper, garlic powder, and paprika together and season both sides of the chicken, then place in the baking dish
In a bowl, combine mayo, sour cream, Parmesan, minced garlic, garlic powder, onion powder, salt, and black pepper until smooth
Spread the creamy garlic Parmesan mixture evenly over each piece of chicken
Bake uncovered for 20–25 minutes, until the internal temperature reaches 165°F (74°C)
Broil for 1–2 minutes to get a golden, bubbly crust
Garnish with fresh parsley and serve warm with rice or roasted vegetables
