Preheat oven to 400 degrees F. Prepare a baking sheet with cooking spray and set aside.
In a large bowl place ranch dressing and in a separate bowl add bread crumbs, cheddar cheese, parmesan cheese.
Start by placing chicken first bowl and coat in dressing. Allow excess to drip on then roll in the second bowl to coat in breading. Place chicken on prepared baking sheet and repeat with each breast of chicken.
Spray the tops of the chicken with cooking spray and bake for 20-25 minutes or until chicken is cooked through. Serve and enjoy!