Preheat the oven to 400 degrees. Place breadcrumbs, cornstarch, garlic salt, pepper, onion powder, paprika, parsley, and thyme into a large Ziplock freezer bag and mix well.
Add the chicken pieces to the bag, one at a time. Shake chicken around to coat well. If you love thicker breading, repeat this step – coat again in oil, then add to the bag of shake and bake mix.