Creamed onions with buttermilk?
You just brought back a nightmarish memory from 1976 when I took my date to a dinner party and, being out of heavy cream, my host (term used loosely) made White Russian cocktails with sour cream. I didn't indulge but date spent a few hours talking to God on the big white telephone before I carried her home and we never saw them again. My thoughts? Yuck! Make the trek. Get the cream. Preserve your palate and relationships.