The mash is water-saturated crushed malts, unmalted grains, and adjuncts that are present in the mash tun when the mashing occurs. During the mashing process, the starches will be broken down into sugars so they can be fermented by the yeast and converted into alcohol.

 

Beer Brewing Mash

The mash for an American Wheat Hefeweizen towards the end of the mashing.