01 - Set oven to 350°F (180°C) and allow it to preheat.
02 - In a large mixing bowl, combine shredded chicken breast, softened cream cheese, shredded cheddar cheese, ranch seasoning mix, and milk. Stir until the mixture is creamy and evenly blended.
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 the filling is thoroughly heated and bubbly.
05 - Stir the hot mixture, then spoon equal portions onto the bottom halves of each sandwich bun.
06 - Top each sandwich with the remaining bacon, add pickles, lettuce, or tomato as desired, and cover with the top buns. Serve immediately while warm.