Preheat the Oven: Set your oven to 350°F (175°C). Spray a 9×13-inch baking dish with nonstick cooking spray and set aside.
Prepare the Butter Topping: In a small bowl, mix together the melted butter, garlic salt, and Italian seasoning. Set aside — you’ll brush this over the rolls later for a golden, flavorful finish.
Mix the Filling: In a medium bowl, combine the shredded chicken, ranch dressing, buffalo sauce, and shredded cheddar cheese. Stir until the mixture is well combined and evenly coated — this creamy, spicy filling is the heart of the sliders.
Assemble the Sliders: Using a large serrated knife, carefully slice the Hawaiian rolls in half horizontally (keeping them connected). Place the bottom half of the rolls in the prepared baking dish. Spread the buffalo chicken mixture evenly over the bottom layer, then place the top half of the rolls back on.
Brush with Butter: Generously brush the tops of the rolls with the melted butter mixture, making sure to cover each roll for extra flavor and that signature golden shine.
Bake Covered: Cover the baking dish with aluminum foil and bake for 15 minutes to allow the cheese to melt and the sliders to heat through.
Uncover and Finish: Remove the foil and bake for an additional 5 minutes or until the tops are golden brown and slightly crispy.
Serve: Remove from the oven and let cool for a few minutes. Slice along the roll lines, serve warm, and enjoy the cheesy, spicy perfection!