What is decoction mashing?
In essence decoction mashing is a temperature controlled mashing method that differs from the normal ‘step-infusion’ mash only in the way the heat is applied. The difference is that in decoction mashing part of the mash is boiled in a separate kettle. The boiled part is added back to the mash to achieve the required temperature rise. The effect of the boil on the final beer is very strong. In my opinion decoction mashing is important (together with the choice of malt and yeast of course) for achieving the characteristic malty taste found in many of the best commercial beers.
