Prepare the chicken by placing the boneless, skinless chicken breasts between two sheets of plastic wrap and pound to an even thickness of about ¾ inch. Season with salt and pepper.

In a mixing bowl, combine the flour and cornstarch. Dip each chicken breast in this mixture, ensuring it is thoroughly coated. Let it rest for about 10 minutes.

Heat vegetable oil to 350°F (175°C) and deep fry the chicken until golden brown and cooked through, about 5-7 minutes. Drain on paper towels.

Prepare the spicy honey sauce by mixing honey and finely chopped jalapeños until blended.

Toast the buns and assemble the sandwich by placing the fried chicken in the bun, drizzling with spicy honey sauce, and adding any desired toppings.

Serve hot and enjoy!