Cook the bacon: Oven option: Bake for 20-25 minutes in the oven at 425 degrees Fahrenheit. Set the bacon on a paper towel-covered plate so it can absorb the excess bacon grease before chopping and adding to the chicken mixture. Stove option: Cook on the stove over medium heat for about 10-15 minutes, flipping the pieces often until they are nice and crispy.Chop the bacon and set aside. Preheat oven to 325℉. Cut the Hawaiian sweet rolls in half horizontally and set the bottom layer of the rolls in a 9x13-inch baking dish. Set the top half of the rolls aside.
Sprinkle 1 cup of shredded cheese over the bottom half of the rolls. In a large mixing bowl, add the shredded chicken, ranch dressing, and chopped bacon and mix thoroughly, making sure to coat the chicken and bacon in ranch.
Evenly spread the chicken mixture over the shredded cheese layer. Sprinkle the remaining 1 cup of shredded cheese over the chicken mixture.
Place the top of the rolls on top of the chicken and cheese mixture.
Add the butter to a microwave-safe bowl and microwave for 20-30 seconds or until the butter has melted. Mix the garlic salt, dried parsley, minced onion, and black pepper into the melted butter and brush the butter mixture over the top of the rolls.
Cover the rolls with aluminum foil and bake covered for 20 minutes. Then, take the aluminum foil off the pan and bake uncovered for an additional 5-10 minutes or until the cheese is melted and the top of the rolls are golden brown. Cut into single sliders and serve immediately!