01 - Preheat the oven to 350°F.
02 - In a large mixing bowl, combine shredded chicken breast, cream cheese, cheddar cheese, ranch seasoning mix, and milk. Mix thoroughly until evenly incorporated.
03 - Fold half of the crumbled bacon into the chicken mixture.
04 - Transfer the mixture to a baking dish and bake uncovered for 20 to 25 minutes, until hot and bubbly.
05 - Stir the baked mixture, then divide evenly over the bottom halves of the sandwich buns.
06 - Top each with reserved bacon, add optional pickles, lettuce, or tomato as desired, and finish with the top halves of the buns. Serve warm.