Season the Chicken: Generously season both sides of the chicken breasts with kosher salt, black pepper, and garlic powder. This helps build foundational flavor before the breading process.
Set Up the Breading Station: In one shallow bowl, whisk together the flour and cornstarch. In a second bowl, combine buttermilk, egg, and hot sauce. Add Panko breadcrumbs to a third bowl and set them all within reach.
Bread the Chicken: Dip each seasoned chicken breast into the flour mixture, coating thoroughly. Transfer to the buttermilk mixture, allowing excess liquid to drip off. Then press the chicken firmly into the breadcrumbs until fully coated. Set aside on a plate.
Fry the Chicken: Heat a thin layer of oil in a large skillet over medium heat. Once the oil is shimmering, add the chicken without overcrowding. Fry for 2–3 minutes per side, until golden and crisp. The internal temperature should reach 165°F; if unsure, slice into the thickest part to check for no pink.
Drain and Rest: Place the cooked chicken cutlets on a paper towel-lined plate to absorb excess oil. Keep warm in a low oven if needed while finishing the rest.
Make the Bang Bang Sauce: In a small bowl, whisk together mayonnaise, sweet chili sauce, sriracha, and honey until smooth. Adjust heat or sweetness based on personal preference.
Assemble the Sliders: Cut the cooked chicken into slider-sized pieces and place them on toasted buns. Immediately top with mozzarella slices so they begin to melt from the warmth. Drizzle with bang bang sauce and serve hot.