In a shallow dish, combine 1 cup all-purpose flour, 1 tablespoon paprika, 1 teaspoon garlic powder, 1 teaspoon onion powder, 1 teaspoon salt, and 1/2 teaspoon black pepper. Mix well.
In another shallow dish, whisk together 1 cup buttermilk and 2 eggs.
Dip each chicken breast into the buttermilk mixture, then dredge in the flour mixture, coating it evenly. Shake off any excess flour.
Heat the vegetable oil in a large skillet over medium-high heat until it reaches 350 degrees Fahrenheit.
Once the oil is hot, carefully add the chicken cutlets and fry them for 4 to 5 minutes on each side, or until they are golden brown and cooked through.
After frying, remove the chicken from the skillet and let it drain on a wire rack or paper towels.
Spread BK Royal Sauce or mayonnaise on the bottom half of each toasted bun.
Place the fried chicken on the buns, then top with tomato slices and lettuce leaves as desired.
Place the top halves of the buns on the sandwiches and serve immediately.
In a bowl, combine 3/4 cup mayonnaise, 1 tablespoon ketchup, and 1 teaspoon Dijon mustard. Mix until well blended. Stir in the relish and Worcestershire sauce, along with garlic powder, onion powder, and paprika.