01 - Set the oven temperature to 350°F and allow it to preheat.
02 - In a large mixing bowl, add shredded chicken, softened cream cheese, shredded cheddar cheese, ranch seasoning mix, and milk. Mix thoroughly until evenly combined.
03 - Fold in half of the crumbled bacon, reserving the remainder for topping.
04 - Transfer the mixture to a baking dish and bake uncovered for 20 to 25 minutes, until bubbling and heated through.
05 - Stir the baked chicken mixture, then distribute evenly onto the bottom half of each bun.
06 - Top each sandwich with reserved bacon and add optional pickles, lettuce, or tomato if desired. Cover with the top bun.
07 - Serve sandwiches warm.