Layer on the chicken, then ranch dressing, bacon, and ⅓ cup of cheese on one slice of bread. Place another slice of bread on top with the buttered side facing out. Repeat with the other sandwich.
In a large skillet on medium low heat, pan grill the sandwiches on both sides until golden brown and the cheese is melted. This can take anywhere between 5-10 minutes depending on the size of your sandwich.
Slice the sandwich in half and serve immediately.
Notes
Press the sandwich down to ensure full contact with the pan to brown evenly using a grill press or plate.