Bacon: Fry bacon in a large skillet over medium heat until crispy. Remove to paper towels to drain, then chop.
Chicken Filling: In a medium bowl, use a whisk to mix together mayonnaise, buttermilk, cream cheese, ranch dressing mix and garlic powder. To the bowl, add bacon, chicken and 1/2 cup of the green onions. Stir to combine. Cover with plastic wrap and chill for 20-25 minutes, or overnight if making in advance.
Preheat oven to 350°F. Line a large baking sheet with foil or parchment paper. Spray foil liberally with cooking spray.
Crescent Dough Ring: Place a small ramekin or cereal bowl in center of baking pan. Arrange crescent triangles, slightly overlapping, around ramekin with wide ends of dough on the inside and pointed ends (short sides of triangles) facing outwards.
Break or cut 5 slices of cheese in half. Arrange overlapping on bottom layer of dough triangle (widest half of each triangle). Spoon chicken mixture over cheese then top with whole slices of remaining cheese.
Bring pointed end of dough triangle over entire filling and tuck underneath the other side. Brush all over with butter and sprinkle with Parmesan cheese.
Bake for 25-30 minutes until a deep golden brown.
Let stand for 5 minutes then slice and serve garnished with chives and ranch dressing for dipping.
Notes
Crescent Rolls - I recommend using original crescent rolls for this recipe, not buttery or honey crescent rolls.
Use a Ramekin for Even Spacing - When arranging the crescent rolls on the pan, a ramekin placed in the middle of the pan serves as a guide to assist in arranging the crescent dough evenly. Remove this from the pan prior to baking.
Cheese - You could use any variety of cheese for this recipe, to suit your taste. Cheese forms the stabilizing edible glue for the filling, and I've find that sliced cheese works best. You can use sharp cheddar cheese, mozzarella cheese, swiss cheese or pepper jack cheese for spice.
Protein - You can use poached chicken, roasted chicken, deli rotisserie chicken or any fully cooked chicken for the crescent ring filling.
Shredded Cheese - Should you choose to use shredded cheese, you'll need three cups total divided into 1 1/2 cups for the bottom layer and 1 1/2 cups to sprinkle over the chicken bacon mixture.
Lighter Options - You can use light mayonnaise, low fat buttermilk, light chive and onion cream cheese and light butter in this recipe. Chicken is naturally a lean meat.