Lager

The defining feature of lager beer is its maturation in cold storage, it is also distinguished by the use of bottom-fermenting lager yeast. While it is possible to use lager yeast in a warm fermentation process such as with American steam beer, the lack of a cold storage maturation phase precludes such beer from being classified as lager beer.

Ref: en.wikipedia.org/wiki/Lager #BoSnapsPhotography

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