Sahti is a Finnish type of farmhouse ale made from malted and unmalted grains including barley and rye.
The end product is a cloudy beer with phenolic flavors and a distinct taste similar to banana, balanced by the bitterness from the juniper branches.
[3] Traditionally, the most common sahti brewing process is using a long step infusion mash that may last up to six hours, after which the wort is lautered through the kuurna.
Some regions of Finland have called their farmhouse ale taari, and in these areas different brewing processes appear to have been used, such as fermenting in the mash, and baking the wet malts in bread-like shapes before lautering.
[5] Modern craft beer versions of sahti can be somewhat removed from the original style, because brewers may use more hops, might not use juniper twigs, could introduce more carbonation, boil the wort, and may not use Finnish baking yeast.