What is cauim beer, and what could possibly connect a fermented root drink brewed in the Amazonian lowlands of Brazil to the global craft beer revival? Cauim is a pre-Columbian fermented beverage made from manioc (cassava) or corn, produced by the Tupi-Guaraní and other indigenous peoples of lowland Brazil, and it remains one of the oldest continuously documented fermented drinks in South America. Unlike beer made with germinated grain, cauim relies on a process that predates malting technology entirely: brewers — traditionally women — chew the starchy root or grain, mixing it with saliva to activate amylase enzymes, then spit the mass into clay fermentation vessels where natural yeasts do their work. The result is mildly alcoholic, subtly sour, and alive with the character of the forest floor and the hands that made it.
Affiliate disclosure: This article contains affiliate links. If you purchase through these links, Brew Cartographer earns a small commission at no extra cost to you.
This expedition maps cauim’s geographic origins in the Amazonian lowlands, traces the traditions of the Tupi-speaking peoples who shaped it, explores the sensory character of this unusual brew, and considers how a handful of contemporary brewers and indigenous communities are keeping the tradition alive. Cauim is emphatically not chicha de jora — though both rely on saliva-based saccharification and predate European contact, they emerge from entirely different cultural geographies. Chicha is an Andean style; cauim belongs to the lowland rainforest world.
Explore the full cauim cluster: How to Brew Cauim at Home and the Cauim Food Pairing Guide.
The Geography: The Amazonian Lowlands of Brazil
Cauim originates in the vast river basins and humid forests of lowland Brazil, with related traditions extending into adjacent territories including parts of Paraguay, Argentina, and the Ecuadorian Amazon — the ancestral homeland of the Tupi-Guaraní language family. Unlike the high-altitude Andean valleys where chicha de jora developed, cauim is a creature of the tropical lowlands. The Amazon basin, with its extraordinary biodiversity, year-round warmth, and abundance of starchy root crops, created the conditions for manioc-based fermentation to thrive.
Manioc — known variously as cassava, mandioca, or yuca — is not a grain at all but a woody shrub whose tubers are among the most calorie-dense foods available in the Amazonian ecosystem. Manioc’s native range spans from southern Mexico through Central America and across tropical South America, but it reached its greatest cultural importance in the Brazilian interior. The tuber requires processing to remove naturally occurring cyanogenic glucosides (compounds that release hydrogen cyanide when raw manioc is chewed or cut), and the labor-intensive preparation of cauim served this purpose while also converting starches into fermentable sugars.
The geographic reach of cauim extended across the coastal and interior Tupi-speaking populations encountered by Portuguese colonizers from 1500 onward. Early colonial records place cauim production throughout what is now coastal Brazil — São Paulo, Rio de Janeiro, Bahia — as well as deep in the interior. Today, the living tradition of cauim (and related regional names for the same drink, including caxiri among some Amazonian groups) persists primarily in indigenous communities in the Amazon basin, the Mato Grosso, and parts of northeastern Brazil.
The History: Five Centuries Under Colonial Pressure
Cauim’s written history begins with Portuguese contact in 1500, but the practice certainly predates European arrival by many centuries, possibly millennia — manioc domestication in Amazonia is estimated at 7,000 to 10,000 years ago, and fermentation likely followed shortly after. The Tupi peoples who greeted Pedro Álvares Cabral’s fleet had already developed a sophisticated fermentation tradition embedded in ceremonial and daily life. Early Portuguese missionaries and colonial administrators documented cauim brewing with a mixture of fascination and discomfort — the saliva-based saccharification was particularly alarming to European sensibilities shaped by grain malting traditions.
Among the most detailed early accounts is that of Hans Staden, a German mercenary who lived as a captive among the Tupinambá people of coastal Brazil from 1549 to 1554. His 1557 account, Warhaftige Historia, describes cauim preparation in considerable detail: women chewing manioc root, spitting the masticated mass into clay vessels, adding water, and allowing the mixture to ferment for several days. A second foundational account comes from Jean de Léry, a French Calvinist missionary whose 1578 Histoire d’un voyage faict en la terre du Brésil independently documented the same practice among the Tupinambá, providing corroborating detail that confirms the tradition’s widespread practice along the Brazilian coast. Staden and Léry were not observing a primitive or accidental process but a refined biotechnology — the brewers knew precisely what consistency was needed, how long to ferment, and when the drink was ready. The process was communal, ritualized, and inseparable from ceremony.
Portuguese colonial authorities, and particularly the Jesuit missionaries who penetrated the interior from the 16th century onward, regarded cauim’s ceremonial use with deep suspicion. Cauim fueled the elaborate feast cycles of Tupinambá culture; it was consumed communally at ceremonies and collective gatherings. Missionary accounts from the 16th and 17th centuries record sustained efforts to suppress cauim production as part of the broader project of cultural dismantlement. These efforts were substantially successful along the coast, where the indigenous population of lowland Brazil was decimated by disease, warfare, and enslavement throughout the colonial period.
In the interior, however, cauim survived. More remote Amazonian groups maintained the tradition through the colonial period and into the 19th and 20th centuries with varying degrees of cultural disruption. The Amazon rubber boom — which peaked between the 1850s and 1912 — brought further pressure on interior communities, but also left documentary traces: anthropologists traveling with rubber tappers recorded cauim brewing in communities that had barely been contacted by outsiders. By the mid-20th century, Brazilian ethnobotanists and anthropologists including Eduardo Viveiros de Castro had begun systematic documentation of Amazonian fermentation traditions, producing detailed accounts of cauim production that serve as the primary academic record of the style.
Today, cauim persists as a living practice among multiple indigenous groups in Brazil — the Kaxinawá (Huni Kuin), the Kamayurá of the upper Xingu basin, and the Kayapó among them. In recent years, growing indigenous rights movements and global interest in ancient fermentation traditions have given cauim modest visibility in craft brewing circles. A small number of Brazilian craft breweries have produced interpretations of cauim, typically using amylase enzymes or malted cassava as substitutes for the traditional chewing step.
What is Cauim Beer? Taste, Aroma, and Appearance
Appearance: Cauim pours cloudy and opaque, ranging from pale cream to murky white or light beige, depending on the manioc or corn variety used and the extent of fermentation. Traditional cauim is never filtered or clarified; the cloudiness is part of the experience, a visible record of active fermentation. The body is light and the head minimal, dissipating quickly. Some versions prepared with red manioc varieties or colored corn may show a pinkish or yellow-brown tint.
Aroma: The nose is unusual for anyone approaching from a conventional beer background. There is an earthy, starchy quality reminiscent of fresh cassava bread or boiled yuca — a starchy warmth rather than grain or malt. Beneath this is a subtle sour note from lactic fermentation, and sometimes a faint funk from wild yeast activity. Some traditional versions include botanical additions — leaves, tree resins, or forest herbs — that introduce herbal or resinous notes. Alcohol, when present at traditional levels, is barely detectable on the nose.
Flavor: Cauim’s flavor is simultaneously simple and strange. The initial impression is starchy sweetness, followed by a gentle lactic tartness that increases the longer the fermentation has run. Traditional cauim is consumed while still actively fermenting, meaning the sourness is mild and the sweetness partially unfermented. The finish is dry with mineral and earthy notes. There is no hop bitterness — none at all — and the absence of that familiar reference point gives cauim a soft, rounded profile that can seem unfamiliar to a palate trained on hopped beer, but reveals its own logic after a few sips.
Mouthfeel: Light to medium-light body with very low carbonation — traditional cauim is essentially still, with only the CO₂ produced by active fermentation providing any effervescence. The texture is slightly silky from suspended cassava solids. Mouthfeel is soft and approachable rather than astringent.
ABV: Traditional cauim typically runs 1–4% alcohol by volume, depending on fermentation duration. The beverage is drunk while still fermenting, so the actual alcohol content varies by when in the fermentation cycle it is consumed. Extended fermentation can push ABV toward 5–6%, but cauim is culturally understood as a mild, refreshing communal drink rather than a strong intoxicant.
Note: Cauim does not have a designated BJCP category in the 2021 guidelines. It might loosely fit under Historical Beer (Category 27) or Specialty Beer (Category 34), but these categories reflect European brewing assumptions and do not capture cauim’s character or cultural context. The BJCP framework has limited utility for pre-Columbian Amazonian fermentation traditions.
The Ingredients That Make Cauim Unique
Manioc (Manihot esculenta) is cauim’s defining ingredient. Among lowland South American cultures, manioc represents the agricultural and culinary center of gravity in much the way wheat defines European grain cultures or rice defines East Asian food traditions. Sweet manioc varieties — lower in cyanogenic glucosides than bitter varieties — are typically used for cauim. The tuber is peeled, grated, sometimes briefly cooked or fermented before chewing, and then chewed and spat into the fermentation vessel.
The saccharification step — the conversion of starch into fermentable sugar — is entirely dependent on salivary amylase (alpha-amylase), an enzyme present in human saliva that breaks down starch molecules into fermentable sugars. This is the same enzyme that makes bread taste sweet as you chew it. In cauim production, extensive chewing by multiple brewers generates enough amylase activity to convert a substantial portion of the manioc starch. Some cauim traditions also use corn (maize) rather than manioc, or a combination of both — corn-based cauim tends to be slightly sweeter and shows a more familiar grain character.
Fermentation relies on wild yeasts naturally present in the environment and retained in clay fermentation vessels across batches. Saccharomyces cerevisiae is likely the dominant yeast in most traditional cauim, but lactic acid bacteria — particularly Lactobacillus species — contribute the gentle tartness that characterizes the drink when consumed young. Traditional clay vessels, never fully sterilized, serve as culture banks, maintaining a community’s house microflora across generations.
Commercial Examples Worth Seeking Out
Cauim remains far more common in living indigenous tradition than in commercial bottles, but a growing number of producers and researchers have documented and produced versions.
- Indigenous cauim, upper Xingu communities, Brazil: The most authentic examples remain in the hands of indigenous brewers — including the Kamayurá and related Xinguano peoples — in the upper Xingu basin. These are not commercially available but have been documented and occasionally shared with researchers and visitors to cultural events.
- Caxiri, various Amazonian communities: Caxiri is a name used for similar manioc-based fermented drinks among several Amazonian groups in the state of Amazonas and adjacent areas. It is functionally the same tradition with regional naming variation.
- Dogfish Head Chicha (circa 2008–2009, limited production): While labeled as a chicha, Dogfish Head’s limited release was produced using the saliva-based saccharification method — brewery staff chewed the corn base — making it perhaps the most documented Western commercial approximation of the traditional technique. It predated widespread awareness of the cauim/chicha cultural distinction.
- Brazilian craft interpretations: A small number of Brazilian craft breweries, particularly in São Paulo and Brasília, have produced cauim-inspired beers since the early 2020s, typically using amylase enzymes or malted cassava as substitutes for the traditional chewing step. These are sporadically available in specialty beer shops in Brazil.
How Does Cauim Compare to Similar Styles?
Cauim vs. Chicha de Jora: The comparison is unavoidable and the distinction is critical. Both are ancient indigenous South American fermented beverages relying on saliva-based saccharification. But cauim is a lowland Amazonian style — Tupi-speaking, manioc-based, Brazilian — while chicha de jora is Andean: Quechua, corn-based, Peruvian. Different geography, different primary starch, different cultural context. Chicha de jora has achieved modest commercial visibility; cauim is still largely a living indigenous tradition with minimal commercial production. Confusing the two collapses distinct cultural histories into a single category.
Cauim vs. Umqombothi: South Africa’s traditional sorghum beer shares structural similarities with cauim: both are low-alcohol, naturally fermented, consumed while still actively fermenting, traditionally made by women, and deeply embedded in ceremonial life. The defining differences are the primary starch (sorghum vs. manioc or corn) and the saccharification method (umqombothi uses sorghum’s own enzymatic activity rather than saliva). Both represent fermentation traditions that commercial beer culture has largely overlooked.
Cauim vs. Sake: Both use enzymatic saccharification of a non-barley starch, though sake’s koji mold (Aspergillus oryzae) is a very different mechanism from salivary alpha-amylase. The comparison is useful for understanding that amylase-based starch conversion is a global technique — humans across multiple cultures independently discovered that starch could be made fermentable before malting technology was developed.
Cauim is the product of millennia of indigenous knowledge embedded in the landscapes, bodies, and communities of Amazonian Brazil. Its survival into the 21st century is not an accident but a testament to the resilience of Tupi-speaking and Amazonian cultures under five centuries of sustained pressure. For the beer explorer, it offers a window into a fermentation tradition that challenges every assumption European brewing culture has encoded — about grain, about saccharification, about what beer can be.
Ready to go deeper? – How to Brew Cauim Beer at Home → – Cauim Beer Food Pairing Guide →
Brew Cartographer explores the history, geography, and craft of rare and forgotten beer styles. Subscribe to our newsletter for new expeditions every week.
