Rum Fire is made from a blend of molasses and dunder, natural airborne yeast, then fermented in cedar vats. This is a major component of the complex flavor profile.

The addition of a dose of dunder from the muck pit helps lower pH, conserve liquid, provide yeast nutrients, and help concentrate estersan integral component indicative of the style that is Hampden Estate and Rum Fire through & through.This funked-out fermentation takes place in a record-setting 18 open-air Jamaican cedar cask.