01 - Set oven temperature to 350°F and allow to fully preheat.
02 - In a large mixing bowl, thoroughly blend shredded chicken breast, softened cream cheese, cheddar cheese, ranch seasoning mix, and milk until evenly combined.
03 - Gently fold in half of the crumbled bacon, reserving the remainder for garnish.
04 - Transfer mixture to a baking dish and bake uncovered for 20 to 25 minutes, or until heated through and bubbling at the edges.
05 - Stir the warm chicken filling, then generously portion onto the bottom halves of each sandwich bun.
06 - Top with remaining bacon. Add pickles, lettuce, or tomato if desired; cover with top halves of buns and serve immediately.