Viili (finnish) is a mesophilic fermented milk product found in the nordic countries, particularly finland. viili is similar to yoghurt or kefir, but when left unmixed, its texture is malleable, or "long". the metabolism of the bacteria used in the fermentation also gives viili a slightly different taste. this cultured milk snack resembles yoghurt and is the result of microbial action of lactic acid bacteria (lab) and a surface-growing yeast-like fungus geotrichum candidum present in milk, which forms a velvet-like surface on viili. in addition, most traditional viili cultures also contain yeast strains such as kluveromyces marxianus and pichia fermentans. the lactic acid bacteria identif...

Source: Wikipedia