01 - Set oven to 350°F (180°C) and allow to fully preheat.
02 - In a large mixing bowl, blend shredded chicken breast, softened cream cheese, shredded cheddar cheese, ranch seasoning mix, and whole milk until thoroughly combined.
03 - Fold half of the crumbled bacon into the chicken mixture for even distribution.
04 - Transfer mixture to a baking dish and bake uncovered for 20 to 25 minutes, or until heated through and bubbling.
05 - Stir filling, then portion evenly onto the bottom halves of split sandwich buns.
06 - Sprinkle remaining bacon over each portion. Add pickles, lettuce, or tomato if desired, place the top bun, and serve immediately while warm.