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Alcoholic drinks from Central Asian and Mongolian steppe
Kumis (koumiss, qymyz, airag)қымыз
Kumis is mare's milk fermented by lactic bacteria and a lactose-fermenting yeast, so it turns sour, fizzy and slightly alcoholic. It is stirred or beaten while it ferments for a few hours, then ripens in closed bottles. Codex defines it by its cultures and a minimum of 0.5 % ethanol.
Fully documentedAlcoholic drinks4.1 h – 5.2 h
Recipe
Amounts from a sourceThe amounts describe controlled production as summarised in a review. Traditional herders back-slop with old kumis and use no fixed amounts.
Mare's milk
Milked in the short season, generally July to October; commercial kumis may use cow's milk fortified to ferment like mare's milk[afzaal2021]
Bulk starter of lactic bacteria and yeast30 % of the milk
Traditional kumis keeps a small amount of the last kumis as the next starter[afzaal2021]
Starter
defined-culture (controlled production) or back-slop (traditional)
Total time across the recorded steps: 4.1 h – 5.2 h
Start
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What changes:Starting material: fresh mare's milk
Step 1 of 7
Milk the mares
Time
Not documented
Temperature
Not documented
Salt
None given
Acidity
Not documented
Which microbes the steps name, step by step
Lactic acid bacteria
Yeasts
L. delbrueckii
Kluyveromyces marxianus
Output: mare's milk.
Flavour
sweet, thin milk
Texture
Not documented
Colour
Not documented
Microbes at work in this step
Not documented for this step.
Method
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
At a glance
Kumis is mare's milk fermented by lactic bacteria and a lactose-fermenting yeast, so it turns sour, fizzy and slightly alcoholic. It is stirred or beaten while it ferments for a few hours, then ripens in closed bottles. Codex defines it by its cultures and a minimum of 0.5 % ethanol. Made in 7 steps over 4.1 h – 5.2 h. The longest step, bottle and finish the fermentation, takes 2–3 h (Afzaal M 2021) and runs at 18–20 °C → 4 °C (Afzaal M 2021). Lactobacillus delbrueckii subsp. bulgaricus and Kluyveromyces marxianus do most of the fermenting.
Kumis is fermented by lactic bacteria together with a yeast that can use lactose, so it gains alcohol and fizz as well as acid. Codex fixes its cultures (L. delbrueckii subsp. bulgaricus and K. marxianus) and a minimum of 0.5 % ethanol and 10^4 yeasts per gram. Unlike kefir it uses no grains. The dairy entry koumiss follows the traditional herder's method.
Airag (Mongolia)Mongolian name and form, made in a hide bag; see the airag entry.
Cow's milk kumisCommercial kumis from cow's milk fortified to ferment like mare's milk.
Safety
Traditional kumis is made from raw milk. Controlled production heats the milk to 90–92 °C for 5–10 min before the starter goes in, and keeps the finished drink at 4–6 °C. The CDC says raw milk and products made from it can carry germs such as Campylobacter, Cryptosporidium, E. coli, Listeria, Brucella and Salmonella, and that children under 5, adults over 65, pregnant women and people with weakened immune systems are at higher risk of serious illness.