Preheat your oven to 375°F and adjust the oven rack to the center position. Prepare a baking sheet by lining it with parchment paper for easier cleanup.
With the rolls still connected, slice them horizontally across the center to create a top and bottom layer. Set the bottom portion on the prepared baking tray.
In a medium bowl, mix together the cooked, shredded chicken with the hot sauce, ranch dressing, and garlic powder until evenly coated.
Sprinkle a small portion of the shredded cheese across the bottom layer of rolls. Distribute the buffalo chicken mixture evenly over the cheese. Finish by scattering the remaining cheese on top of the chicken.
Cover with the top half of the rolls. In a separate small bowl, stir together the melted butter and Italian seasoning. Generously brush this mixture over the tops of the rolls.
Place the tray in the oven and bake for 10–12 minutes, or until the cheese is thoroughly melted and the tops are golden brown.
Remove from the oven and allow the sliders to cool slightly on a cutting board. Use a serrated knife to separate the individual sliders before serving.