I have been experimenting:
2-3 oz rye Bulleit 95 proof
3/4 - 1 oz Bauchant Liqueur
3-4 heavy dashes of Peychaud Bitters
garnished with a badabing maraschino cherry
old fashioned glass with ice, bitters then liqueur, finished with bourbon, stirred gently
next, same recipe with Evan Williams 1783 substituted for rye....
I found both great but the rye edged out the 1783