By Kirk Miller Welcome to Show Me the Proof, a column where we pose big questions to the booze world and get drinks experts to argue the finer points. In our latest column, we’re taking on the new(ish) trend of bourbon cream. I take my bourbon seriously. I wasn’t sure if I could take bourbon cream seriously, though. In the past few years, several big and respected American whiskey brands have started to release something called bourbon cream, which seemed like a marketing gimmick aimed at non-whiskey fans (remember honey whiskey?). Still, I never like to dismiss a new product without trying it…