Sahti

Sahti is a traditional beer from Finland made from a variety of grains, malted and unmalted, including barley, rye, wheat, and oats; sometimes bread made from these grains is fermented instead of malt itself. Traditionally the beer is flavored with juniper berries in addition to, or instead of, hops; the mash is filtered through juniper twigs through a trough-shaped tun called a kuurna in Finnish. Sahti has a distinct banana flavor due to the production of isoamyl acetate by the yeast. Sahti is a top-fermented brew (ale), and while baking yeast has been used traditionally, ale yeast may also be used in fermenting.