01 - Slice each chicken breast horizontally to create 4 thin cutlets of even thickness.
02 - Whisk buttermilk with garlic powder, onion powder, salt, and pepper. Submerge chicken pieces and marinate for 15 minutes, refrigerated for up to 4 hours for enhanced flavor.
03 - Prepare three shallow bowls: one with flour, one with beaten eggs, and one with panko combined with grated Parmesan.
04 - Remove chicken from marinade. Dredge each piece in flour, dip into beaten eggs, then press firmly into panko-Parmesan mixture to coat completely.
05 - Heat ½ inch vegetable oil in large skillet over medium-high heat. Fry chicken for 3–4 minutes per side until golden brown and internal temperature reaches 165°F. Drain on paper towels.
06 - Lightly toast the buns until golden and warm.
07 - Spread Caesar dressing on bottom buns. Layer with shredded romaine, crispy chicken cutlet, additional dressing, shaved Parmesan, and fresh black pepper. Top with upper bun.