Preheat the oven to 350 degrees and line a small baking sheet with parchment paper.
Add bacon pieces to a large skillet over medium low heat. Cook until crispy, drain and set aside. While the bacon is cooking, begin assembling the sandwiches.
Cut the loaf of Hawaiian sliders in half, like one large sandwich.
Place the bottom half on the prepared baking sheet with the cut side up. Place the top half on a piece of parchment paper, cut side up.
Spread each half with a layer of ranch dressing.
Divide the cheese and cover both the top and bottom halves with a layer of cheese slices.
Spread the chicken in an even layer over only the bottom half of the bread.
Spread the cooked bacon pieces over the chicken on the bottom half of the bread.
Carefully flip the top half to cover the bottom, making a large sandwich on the baking sheet.
Add the butter, garlic powder, onion powder and parsley to a small pan over medium heat. Cook and stir until the butter is melted and bubbly.
Spoon the melted garlic butter over the tops of the sliders and sprinkle with parmesan cheese.
Wrap the tray of sliders with aluminum foil. Bake in the preheated oven for 10 minutes, then remove the foil and bake for another 10 minutes until the tops are golden brown and the cheese is melted.
Notes
Store leftover sliders in an airtight container in the refrigerator for 2-3 days. Wrap in foil and reheat in an oven at 350 degrees for about 10 minutes or until warmed through.