What is a Sour Mash Whiskey?

What is a Sour Mash Whiskey?

So what is sour mash whiskey anyway? The term sour mash gets thrown around a lot, but it’s really just a technique used in making whiskey.  It is not particular to any one brand of whiskey.  In fact, most whiskeys are made using this technique. Before you can distill, you have to make the alcohol.  Distillation is just the process of removing and refining the alcohol that yeasts produce in the fermentation process beforehand.   The whole reason that distillers are so concerned with quality of grain is because they want their yeasts to have the best grains that can produce the best food for them to “eat”.  The distiller cooks those grains in a big pot called a mashtun to create a delicious, warm, sugary mash for their yeasts to feast upon.  Those yeasts, when not...