Place Hawaiian rolls on a cutting board. Without separating the rolls individually, use a serrated knife and slice the buns across (making tops and bottoms). The tops of your buns will be in one layer, and the bottoms will be in their own separate layer.
Place the bottom layer of your rolls onto the parchment paper.
Melt the butter in microwave-safe bowl for 1 minute, stirring halfway.
Add the dry ranch seasoning to the melted butter and stir to combine.
With a pastry brush, cover the bottom layer of buns with the butter mixture (using about half of the mixture).
Place your sliced Colby Jack cheese over the butter layer.
Cover the cheese layer with your shredded chicken.
Drizzle the ranch dressing over the chicken evenly.
On top of the ranch dressing layer, sprinkle the crumbled bacon evenly.
Top with the shredded sharp Cheddar cheese.
Place the tops of the Hawaiian rolls over the shredded cheese layer.
With the pastry brush, cover the tops of the rolls with the remaining butter mixture.
Sprinkle with grated Parmesan.
Cover the rolls loosely with aluminum foil. Bake at 325°F for 15 minutes. Remove the foil and continue to cook the sliders for 8-10 minutes or until warmed throughout and the tops are golden. Slice the sliders and serve warm. (Sprinkle with some chopped parsley for an optional garnish.)
Notes
Can I prep the chicken bacon ranch sliders ahead of time? Sure! Prepare the sandwiches and place the top of the Hawaiian rolls over the cheddar cheese layer. Do not add the butter mixture. Refrigerate. When ready to cook, finish the remaining steps, starting with the butter mixture.