Preheat your oven to 350°F (175°C). Lightly grease a 9x13-inch baking dish or line with parchment paper.
In a mixing bowl, combine the shredded chicken, softened cream cheese, ranch seasoning, shredded cheddar, and crumbled bacon. Mix until fully combined and creamy.
Slice the slider buns in half horizontally, keeping the bottoms and tops intact as slabs. Place the bottom halves in the prepared dish. Spread the crack chicken mixture evenly over the bottom buns, then place the top halves on.
Mix melted butter with garlic powder and parsley. Brush over the tops of the buns to coat evenly.
Bake uncovered for 12–15 minutes, or until the tops are golden brown and the filling is hot and melty. Let cool slightly before slicing and serving.