Changes

An alternative to the infusion mash is the temperature mash. Rather than adding a known quantity of hot water, the mixed water and grains are simply raised to the target mashing temperature and held at that temperature until the starch conversion is complete. While this is quite practical for a commercial brewer, temperature mashing presents challenges to home brewers. Most homebrewers use simple pots over a stove or propane burner, and it is difficult to hold a precise mashing temperature for an extended period using just a stove and pot.

A third technique traditionally used in Germany for many beer styles is decoction mashing. In a decoction mash, a quantity of mash including both grains and water is moved to a second container where it is brought to a boil. The boiling mixture is then added back to the original mash to raise the temperature of the overall mash. Again, a calculator or brewing software is needed to accurately calculate the correct volume to decoct. Traditional decoctions were typically done at higher water to grain ratios of 2.0 qt/lb or more. More modern techniques often use water to grain ratios closer to the 1.25-1.5 qt/lb range.