18: Elderflower liqueur seems oddly specific, but it pairs well with orange liqueur (e.g. Cointreau) and pretty much any column-distilled spirit (bourbon being the obvious exception) or Blanco tequila. On its own, St. Germain is not generally sippable, but the character of its flavor is clear. Mixed with other liquors, it has a delightfully fruity depth that makes any cocktail refreshing and summery.