Preheat your oven to 350°F and grease a 9x13 inch baking dish with butter or cooking spray. While the oven heats, gather all your ingredients and do your prep work: shred the chicken into ½-inch pieces, cook and crumble the bacon into small bits, shred the cheddar cheese, chop the green onion, and melt the butter separately so it cools slightly. Having everything ready before you start cooking ensures a smooth assembly process.

Melt the softened cream cheese in a large pot over medium heat, stirring occasionally to prevent sticking. Once melted and smooth, add the ranch dressing mix, onion powder, garlic powder, black pepper, and Worcestershire sauce, stirring well to combine. Fold in the green onion, shredded chicken, crumbled bacon, and 1 cup of the cheddar cheese until everything is evenly distributed and the mixture is creamy. I like to taste a small spoonful at this point to adjust seasonings if needed—the filling should taste bold and savory since it's the flavor foundation of the sliders.

Slice the Hawaiian rolls in half horizontally and arrange the bottom halves in a single layer in your prepared baking dish, cutting or adjusting them to fit snugly. Spread the crack chicken filling evenly over the bottom rolls, making sure to distribute it all the way to the edges. Sprinkle the remaining 1.5 cups of cheddar cheese over the filling in an even layer, then place the top roll halves over the cheese. I find it helpful to press down gently on the rolls so everything compacts slightly—this helps the sliders stay together when you cut and serve them.

Brush the melted butter evenly over the tops of the rolls, then sprinkle the parmesan cheese and chives over the buttered surface. Cover the baking dish tightly with foil and bake for 25 minutes. Remove the foil and bake uncovered for an additional 5-8 minutes until the tops are light golden brown and the cheese is bubbly around the edges. Let the sliders rest in the hot baking dish for 5 minutes before cutting—this allows the filling to set slightly and makes serving much cleaner.