Last updated:
California Common, also known as Steam Beer, is the most distinctly American beer style to survive from the 19th century, a hybrid lager fermented at ale temperatures using a specific lager yeast strain that evolved to work in the warm conditions of San Francisco’s pre-refrigeration breweries. The style is fascinating to me as a homebrewer because it represents a genuine accident of circumstance: a yeast adapting to its environment over decades of selection pressure to produce a flavor profile that is uniquely tied to a specific place and time.
California Common (Steam Beer): origins and the San Francisco brewing tradition
The Gold Rush brewing context: San Francisco’s brewing history is inseparable from the California Gold Rush of 1848–1855. The influx of tens of thousands of miners and settlers created an immediate demand for beer, and a supply problem. German immigrant brewers who dominated American lager brewing faced a specific challenge in San Francisco: the city lacked natural ice year-round (necessary for the cold lagering that German lager yeast requires), and commercial ice was expensive or unavailable in the 1850s–1870s. The California solution: Rather than importing ice or switching to ale production entirely, San Francisco brewers used lager yeast but fermented at ambient temperatures, typically 18–21°C, far warmer than the 8–12°C lager fermentation standard. The wider, shallower fermenting vessels used in San Francisco (the distinctive wide, open-top fermenters visible in historical photographs of the San Francisco breweries) allowed better heat dissipation in the cool coastal air and became characteristic of the California Common production method. Why “Steam Beer”: The origin of the name “Steam Beer” is debated. Several theories: the beer was served at higher-than-usual carbonation (the wild fermentation produced abundant CO2), creating a steaming effect when drawn. Alternatively, the fog and steam from the open fermenters visible from the street gave breweries a distinctive appearance. Or: “steam” was a colloquial term for a certain grade of beer quality in 19th-century California. The name persists despite the uncertainty. Anchor Brewing’s revival: By the mid-20th century, Steam Beer had declined to near-extinction, most California breweries had adopted refrigeration and standard lager production. Fritz Maytag purchased the nearly-bankrupt Anchor Brewing Company in San Francisco in 1965 and revived the Steam Beer tradition, releasing Anchor Steam Beer commercially. Anchor trademarked the term “Steam Beer” in the US, hence the style is now officially called “California Common” in brewing style guides, though Anchor Steam Beer remains the category’s defining commercial example. The yeast: California Common uses a specific lager yeast strain (White Labs WLP810 California Lager, Wyeast 2112 California Lager) that ferments cleanly at 14–18°C, the strain’s tolerance for warm fermentation without producing ale-like esters is the key to the style’s clean yet malt-forward character.
Common Questions
Is California Common a good beer for Indian homebrewers to make?
California Common is one of the most practical beer styles for Indian homebrewing for the same reason it was ideal for pre-refrigeration San Francisco: it uses lager yeast but ferments at warm temperatures, eliminating the need for a dedicated fermentation refrigerator. In India, where ambient temperatures in most cities range from 20–30°C year-round (and significantly higher in summer), true lager fermentation at 8–12°C requires a chest freezer with temperature control. California Common at 14–18°C is achievable in most Indian homes during the cooler months (October–February in North India, much of the year in higher-altitude areas) and with minimal cooling assistance in summer. The fermentation temperature target: WLP810 California Lager yeast works best at 14–18°C. In an Indian home without fermentation temperature control during cooler months (say, an overnight low of 18°C), fermenting in the coolest room produces acceptable results. A Son of Fermentation Chiller (see the SoFC article) can reduce temperatures by 5–10°C, bringing summer ambient conditions into the acceptable range. The flavor profile of California Common, toasty malt with a distinctive woody, slightly minty hop character from Northern Brewer hops (the traditional choice) and the clean, slightly lagery fermentation character, is a compelling departure from ale styles and provides Indian homebrewers a taste of the American heritage lager tradition without the full cold-fermentation infrastructure. Recipe simplicity: California Common is a moderately complex beer (OG 1.048–1.054, 30–35 IBU, Northern Brewer hops, Vienna and crystal malt) that is very approachable for intermediate homebrewers. The forgiving yeast and straightforward recipe make it an excellent choice for a first cold-adjacent brewing experience.
