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Cheese from Steppe and mountain belt from Anatolia and Iran through Central Asia and Mongolia to the Sikkim Himalaya
Dried sour-milk curd family (qurut, aaruul, kashk, chhurpi)құрт
Dried curd is made by souring milk, boiling the sour milk so the curd separates, then pressing, salting and drying it in the sun until it is hard. Low water and high acid keep it for over a year, and it is eaten as a snack or dissolved in soups, broth, porridge and drinks.
Fully documentedCheese13 days – 20 days
Recipe
Amounts from a sourceNo batch size is given. The figures are the typical Kazakh qurt method in the cited paper; other peoples vary it.
Milk (cow, sheep, goat or others)
Raw milk may sour on its own; otherwise heated, cooled and inoculated[oskenbay2016]
backslop (previous sour milk, yoghurt or qurut itself) or spontaneous souring
Total time across the recorded steps: 13 days – 20 days
Start
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What changes:Milk sours into yoghurt or sour milk
Step 1 of 4
Sour the milk into yoghurt or sour milk
Time
24 h – 2 days
Reported
Temperature
40–45 °C
Reported
Salt
None given
Acidity
pH 4.6–4.7
Reported
Which microbes the steps name, step by step
Lactic acid bacteria
Output: sour milk or yoghurt.
Flavour
sour
Texture
set gel
Colour
Not documented
Microbes at work in this step
lactic bacteria acidify the milk
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
Dried curd is made by souring milk, boiling the sour milk so the curd separates, then pressing, salting and drying it in the sun until it is hard. Low water and high acid keep it for over a year, and it is eaten as a snack or dissolved in soups, broth, porridge and drinks. Made in 4 steps over 13 days – 20 days. The longest step, shape and sun-dry, takes 10–15 days (Oskenbay M. 2016). Salt is up to 3 % (Oskenbay M. 2016). Streptococci and lactobacilli that sour raw milk left one or two days at room temperature and Streptococcus thermophilus and Lactobacillus delbrueckii subsp. bulgaricus do most of the fermenting.
Qurut / kurt (Kazakh, Kyrgyz, Uzbek, Turkmen gurt)salted; balls; some flavoured with beet or carrot juice, herbs or fruit
Kashk (Persian), keş (Kurdish), aaruul (Mongolian)names for related dried milk products that Oskenbay lists beside the Turkic qurt; she does not describe how they are made
Hard chhurpi (Himalaya)soft chhurpi, the casein-rich curd left after churning butter from yak or cow milk, is dehydrated into the hard type (churkam)
Chortana name for the dried curd in which chor means dried; Oskenbay lists it among the forms of qurt
In the 13th century William of Rubruck described the curd of nomads that was boiled, dried in the sun until it was as hard as iron slag, and stored in bags for winter, as quoted by Oskenbay.