What Are Congeners?

What Are Congeners?

What the heck is a congener? The easy answer is that they are the flavor bits that yeast leaves behind after “digesting” sugar during fermentation.  Yeasts are the wonderful little micro-organisms that are responsible for alcohol!  We would not have beer, wine, whiskey or any other fermented beverage without it. Yeasts convert simple sugars into mainly ethanol and carbon dioxide, but there are other bi-products produced called congeners. Congeners, in Latin, means born together. They may be aldehydes, esters, high alcohols such as fusel oils, or acids.  Each species of distillers’ yeast may produce different congeners that affect the flavor of each fermented mash they produce.  A distiller may be very protective of their proprietary yeast strain for its ability...