Mashing, the first step, converts starches into sugars. The barley malt is ground
into grist, which is fed into a container called a mash tun along with hot water.
Adjuncts, usually corn or rice are precooked and added to the mash tun. Everything
is mixed and cooked together at low temperatures (up to 169F or 76C) for one
to six hours. During the process the malt enzymes are activated and turn starches
to sugars. Then the grain residue is strained out and the remaining liquid, now
called wort, is conveyed to the brew kettle