Processed

Saccharomyces pastorianus

A tier

Saccharomyces pastorianus (formerly carlsbergensis) is the cold-tolerant hybrid yeast of lager brewing—clean fermentation, low esters, and crisp beer profiles rather than bakery rise. It is not a substitute for baker’s yeast in bread: temperatures, sugar preferences, and dough performance differ. Brewers pitch it for lagers and some hybrid beers; bakers almost never use it for loaves. Good lager yeast smells clean and ferments cool without aggressive fruitiness. Confused labelling sometimes calls many brewing yeasts “S. cerevisiae”; true pastorianus is the lager workhorse. Keep cultures cold and follow brewery handling, not brioche recipes.