Exam Focus
- Ale yeast is Saccharomyces cerevisiae.
- Lager yeast is Saccharomyces pastorianus, also known as Saccharomyces carlsbergensis.
- Ale yeast often produces more fruity esters.
- Some ale strains produce spicy phenolic notes.
- Other yeast and bacteria can contribute beer flavor.
Yeast taxonomy and flavor
Yeast selection strongly affects whether beer presents fruity, spicy, clean, malt-focused, hop-focused, sour, or otherwise complex character.
Key Terms
- Saccharomyces cerevisiae
- The common ale yeast species.
- Saccharomyces pastorianus
- The common lager yeast species.