01 - Set oven to 350°F and allow to fully preheat.
02 - In a large mixing bowl, thoroughly blend shredded chicken, softened cream cheese, cheddar cheese, ranch seasoning mix, and milk until the mixture is smooth and evenly combined.
03 - Fold in half of the crumbled bacon to distribute throughout the filling.
04 - Transfer the prepared chicken mixture to a baking dish and bake uncovered for 20 to 25 minutes until the mixture is piping hot and bubbling at the edges.
05 - Stir the filling, then portion it evenly onto the bottom halves of each sandwich bun.
06 - Sprinkle with remaining bacon and add optional pickles, lettuce, or tomato as desired. Complete each sandwich with the top bun.
07 - Present sandwiches warm for immediate enjoyment.