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Dahi

Dahi in a traditional Manipuri earthen pot.
Alternative names	Thayir, Perugu, Doi
Course	yogurt/Fermented milk product
Place of origin	Indian subcontinent
Associated national cuisine	India, Bangladesh, Pakistan, Nepal, Sri Lanka
Main ingredients	cow's milk, and sometimes buffalo milk, or goat milk
Cookbook: Dahi   Media: Dahi

A cup of dahi ready for the dessert.

Dahi (Hindi/Marathi: दही, Urdu: دہی dahī; Bengali: দই, Assamese: দৈ, Sylheti: ꠖꠂ doi; Tamil: தயிர் thayir, Telugu: పెరుగు perugu, Malayalam: തൈര് tayir) is a traditional yogurt or fermented milk product, originating from the Indian subcontinent, usually prepared from cow's milk, and sometimes buffalo milk, or goat milk.^[1] It is popular throughout the Indian subcontinent.^[1] The word curd is used in Indian English to refer to (naturally probiotic) homemade yogurt,^[2][3] while the term yogurt refers to the pasteurized commercial variety known as heat treated fermented milk.^[4]

Preparation

Dahi is made by bacterial fermentation of milk. In this process lactose in milk is converted into lactic acid by several probiotic microorganisms. The species involved in the fermentation depends on the temperature and humidity of the environment, and may include Lactococcus lactis, Streptococcus diacetylactis, Streptococcus cremoris, Lactobacillus delbrueckii subsp. bulgaricus and Streptococcus thermophilus.

Dahi starter is made with dried red chillies (or their stems) in hot milk. Milk is boiled and then allowed to cool for a while. When lukewarm, dried chili peppers or their stems are added. The reason for this tradition is that dried chillies are rich in a type of lactobacilli, the bacteria that helps in fermentation of milk to form dahi. The bowl is then kept undisturbed in a warm place for 5 to 10 hours.

After the starter is made, or saved from previous batch of dahi, milk is boiled and cooled. In a separate bowl dahi is mixed with its whey, and then mixed together with the milk. It is then left to sit undisturbed for 5 to 10 hours.

This practice can also be applied for making dahi/yogurt from milk substitutes, such as soy milk.^[5]

Types

Buffalo curd

A pot of buffalo curd with treacle in Sri Lanka.

Buffalo curd (Sinhalese: මුදවාපු මී කිරි mudavāpu meekiri) is a traditional type of yogurt prepared from water buffalo milk. It is popular throughout the Indian subcontinent. Buffalo milk is traditionally better than cow milk due to its higher fat content making a thicker yogurt mass.^[6] Mostly clay pots are used as packaging material for Buffalo curd.

Buffalo curd is obtained by bacterial fermentation of buffalo milk. In this process lactose in buffalo milk is converted into lactic acid using several micro-organisms. The species involved in the fermentation include Lactococcus lactis, Streptococcus diacetylactis, Streptococcus cremoris, Lactobacillus delbrueckii subsp. bulgaricus and Streptococcus thermophilus.

Buffalo curd has a higher nutritional value of protein, fat, lactose, minerals and vitamins. Quality of the curd depends on the starter culture. Fermentation also develops the characteristic flavor and colour of the product.

Buffalo curd can be made in both traditional and industrial forms. Traditionally buffalo milk is filtered and boiled, the scum is removed and it is cooled to room temperature. A few spoonfuls of a previous batch of curd are added and it is then mixed well and poured into clay pots. These are sealed by wrapping a piece of paper over the pot and allowing it to stand for 12 hours.^[7]

Dahi dishes

Dinner served with dahi on Shatabdi Express train.

Curd rice

Dahi is an important part of everyday diet in the Indian subcontinent, both in slow cooked food and fast food.

Slow (cooked) food

• Dahi chawal – curd rice
  


• Dahi kadhi – yogurt curry


• 
  Doi maach – Bengali dish, fish in yogurt curry


• 
  Coconut chutney – side dish for Idli/Dosa/Uttapam, south Indian cuisine


• 
  Raita – side dish for Biryani


• 
  Dahi baigan/Kathrikai thayir kothsu – Eggplant with dahi, south Indian cuisine


• 
  Perugu Pachadi – dahi-based dip, Andhra dish


• 
  Thepla – served with plain dahi, Gujrati dish

Fast food

• 
  Dahi vada / Dahi bhalla^[8]
  


• 
  Lassi – dahi mixed with water and sweetner, usually sugar or molasses.


• Papri chaat


• 
  Dahi puri – variation of Panipuri, using dahi instead of tamarind water


• Dahi bhelpuri – variation of Bhelpuri, with dahi on top


• 
  Aloo tikki – plain dahi is a side dish for Aloo tikki


• 
  Aloo paratha – plain dahi is a side dish for Aloo paratha


• 
  Mishti doi – dahi that is fermented after adding sweetner to milk, usually cane Jaggery or date palm jaggery.

See also

• Dadiah


• Dhau

References

External links

Wikimedia Commons has media related to Dahi.

• How to make curd or dahi


• How to make curd


• Curd and treacle


• Curd pots

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