Answer: sourmash

AnswerCrossword Clue
SOURMASHBourbon ingredient
SOURMASHDISTILLERY INGREDIENT
SOURMASHBourbon blend
SOURMASHWhiskey type
SOURMASHBrewer's mixture.
SOURMASHWhiskey distillery supply
SOURMASHBlend for making whiskey
SOURMASHStarter supply for making bourbon