Buttermilk adds acid to the mix which is a chemical reaction that is a bit slower . If they are not touching they brown all over and do not rise as well. Touching they rise higher and softer centres .
They also have a shorter self life. Hope you know how to make gravy .
Why do ALL recipes specify that the biscuits need to touch each other in the pan prior to baking?
I know they turn out better this way, but why is that? Is it a communal-effort with biscuits or something?