Sunday, November 30, 2008
Buttermilk is a fermented dairy product created from cows' milk with a characteristically sour taste. This product is made in one of two ways. Initially, buttermilk was the liquid left over from churning butter from cream. In India, buttermilk, widely known as "chaas" that is a liquid leftover after extracting butter from churned curd (dei). Today, it is called traditional buttermilk. On the other hand artificially made buttermilk which is also known as cultured buttermilk, is a product where lactic acid bacteria called Streptococcus lactis have been added to milk. It is whether due to traditional or cultured buttermilk, the sharpness of buttermilk is due to the presence of acid in the milk.Increase in acidity is primarily due to lactic acid, a by-product naturally produced by lactic acid bacteria while fermenting lactose, the primary sugar found in milk. As lactic acid is produced by the bacteria, the pH of the milk decreases and casein, the primary protein in milk, precipitates causing the curdling or clabbering of milk. This process makes the buttermilk thicker than the normal milk. As both traditional and cultured buttermilk contains lactic acid, the cultured buttermilk tends to be thicker compared to the traditional buttermilk.
In the early 1900s, cultured buttermilk was branded as artificial buttermilk, to differentiate it from traditional buttermilk which also known as natural or ordinary buttermilk.
Acidified buttermilk is a related product that is made by adding a food-grade acid to milk. Buttermilk is lower in fat as well as calories than regular milk, has the fat is already removed from buttermilk to make butter. Buttermilk is high in potassium, vitamin B12 and calcium. It is easily digestible product and contains more lactic acid than skim milk. As it is an easy digestible product (a result of the bacteria added to the milk), protein and calcium can be taken up more easily by the body. There are 99 kilocalories and 2.2 grams of fat in one cup of buttermilk (fat content may be different with some buttermilk brands), compared to milk which has 157 kilocalories and 8.9 grams of fat.
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by kanth @ 7:49 AM
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