Ask ten people what falernum is and you'll get ten answers — lime, ginger, almond, clove, allspice, in some ratio nobody fully agrees on. That vagueness is the point; it's the mystery spice hiding in the back of half the great tiki drinks, the thing you can't quite name but notice the second it's missing. The Caribbean has argued over the recipe for a century. This one is lime, ginger, almond, a serious hit of baking spice, and a blend of cane and brown sugar — sweet up front, warm in the middle, a little ginger heat on the way out.

It's the backbone of a Zombie and the whole reason a Corn 'n' Oil works — try it with a blackstrap rum and see. It carries a 151 Swizzle, turns up in a Three Dots and a Dash, and does honest work anywhere a drink feels like it's missing one ingredient it can't name. This isn't the boozy old falernum liqueur — it's the spice, undiluted, so you decide where the rum goes.

Once opened, refrigerate and use within 90 days — unopened, it keeps for two years from the date of manufacture.