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Cheese from Ethiopia
Ayib is a soft, crumbly fresh cheese made in Ethiopian homes from the buttermilk left after butter making. Raw milk sours on its own into ergo in a clay pot, is churned to take off the butter, and the sour defatted buttermilk (arera) is heated to about 50–60 °C until curd floats. The curd then drains in a cloth or sieve.
| Raw cow milk | Soured on its own into ergo, then churned for butter[karssa2024][yilma2007] |
| No added starter | The milk sours spontaneously; the curd forms when the soured buttermilk is heated[karssa2024] |
| Spices, salt and herbs such as koserete, black cumin, korerima, rue and fenugreekto taste (optional) | Added when it is eaten or kept, for flavour and keeping quality[karssa2024] |
| Starter | spontaneous; milk sours in the household's smoked clay pot |
Total time across the recorded steps: 2.1 days – 3.1 days
What changes: Raw milk sours on its own into thick ergo in a clay pot
Output: ergo (spontaneously soured milk).
Microbes at work in this step
lactic acid bacteria sour the milk on its own
Measured measured in a studySet fixed by a specification or tested recipeReported one source reports itTypical a general value, not sourced for this fermentUnconfirmed not yet checked against a source
Ayib is a soft, crumbly fresh cheese made in Ethiopian homes from the buttermilk left after butter making. Raw milk sours on its own into ergo in a clay pot, is churned to take off the butter, and the sour defatted buttermilk (arera) is heated to about 50–60 °C until curd floats. The curd then drains in a cloth or sieve. Made in 6 steps over 2.1 days – 3.1 days. The longest step, sour the milk into ergo, takes 2.1–3 days (Yilma Z 2007) and runs at 30 °C (Karssa T.H 2024). Lactic acid bacteria, dominant in ergo, the soured milk ayib is made from and Lactococcus lactis and Lactiplantibacillus plantarum, reported in fermented buttermilk do most of the fermenting.
| Main step | 2.1–3 daysMeasured[yilma2007] | Sour the milk into ergo |
|---|---|---|
| Temperature | 30 °CReported[karssa2024] | Sour the milk into ergo |
Ayib is made from what is left after butter making, not from whole milk, and it sets from the acid of spontaneous souring plus heat. That makes it low in fat and close to ricotta-style or acid-heat cheeses.
Farm ayib often carries high counts of coliforms and Enterobacteriaceae, and E. coli O157:H7, Salmonella and S. aureus have been found in Ethiopian dairy products. A challenge study cited in the review found Salmonella Typhimurium survived a 50 °C cook but not 60 or 70 °C. The review also says E. coli O157:H7 survived 50–60 °C during ayib making, and that cooking at 70 °C stopped it. It spoils within 2–3 days unless kept cool.
Hazards the sources name: Escherichia coli, the dominant isolate among Enterobacteriaceae identified in farm butter and ayib samples; E. coli O157:H7 can survive ergo and ayib making; Salmonella Typhimurium, which survived a 50 °C ayib cook in a challenge study but not 60 or 70 °C; Staphylococcus aureus, found in about 18.6 % of Ethiopian cottage cheese samples (pooled).
Every number is labelled with how it is known. How this atlas is made
