- cooking spray
 - 1 cup buttermilk
 - 1 (1.25 ounce) package taco seasoning mix, divided
 - 1/8 teaspoon cayenne pepper
 - 1 cup bread crumbs
 - 1 cup grated Parmesan cheese
 - 1/4 cup all-purpose flour
 - 1/2 teaspoon onion powder
 - 1/2 teaspoon salt (optional)
 - 1/4 teaspoon ground black pepper
 - 4 skinless, boneless chicken breast halves
 
- Preheat the oven to 375 degrees F (190 degrees C). Spray a broiler pan with cooking spray.
 - Whisk buttermilk, 1 teaspoon taco seasoning, and cayenne pepper together in a bowl.
 - Mix remaining taco seasoning, bread crumbs, Parmesan cheese, flour, onion powder, salt, and black pepper together in a separate bowl.
 - Dip chicken in buttermilk mixture; coat with bread crumbs mixture. Place coated chicken in broiler pan.
 - Bake in the preheated oven until chicken is longer pink in the center and coating is crispy, 30 to 35 minutes. An instant-read thermometer inserted into the center should read at least 165 degrees F (74 degrees C).