Broken rice is fragments of rice grains, broken in the field, during drying, during transport, or during milling. Mechanical separators are used to separate the broken grains from the whole grains and sort them by size.
Broken rice is fragmented, not considered to be defective, and beside aesthetics, it is equivalent to non-broken rice. It is as nutritious as the equivalent quantity of unbroken rice (i.e. if all the rice germ and rice bran remains, it is as nutritious as brown rice; if none remains, it is as nutritious as white rice).
Broken rice has a long history; Ibn Baṭṭūṭa mentions rice couscous in the area of Mali in 1350, presumably made of African rice.
On milling, Oryza sativa, commonly known as Asian rice or paddy rice, produces around 50% whole rice then approximately 16% broken rice, 20% husk, 14% bran and meal.G. J. H. Grubben, Sutjipto Partohardjono, Cereals Prosea Project - 1996 - Page 114 "On milling, paddy gives approximately: husk 20%, whole rice 50%, broken rice 16%, bran and meal 14%. The husked or hulled rice is usually called brown rice, and this is then milled to remove the outer layers, including the aleurone layer "A. Th. G. Elzebroek, Koop Wind Guide to Cultivated Plants 2008 - Page 346 "In West Africa, a hybrid between O. sativa and O. glabberima has been developed. This new hybrid, labelled 'Nerica' ... grains are sold as 'broken rice'. Very small broken rice is called 'brewers' rice', generally used for industrial purposes. On milling paddy gives approximately 20% husk, 50% brown rice, 16% broken rice, 14% bran and meal. African rice, Oryza glaberrima, has more brittle grains, so breakage is higher.
The broken varieties are often less expensive, Grain trade report International Wheat Council, International Grains Council -- Nos 276/285 1999 -- Page 36 "Thai 100% grade B white rice (referred to as "white rice" in this section) is a widely-traded, high- quality variety, and Thai A1 Special broken rice represents a cheaper type that is often marketed to West Africa, for example. Many other types and ..."William E. Burns Science And Technology in Colonial America 2005 - Page 12 "... purpose in West Africa. The baskets were then rotated and tossed to separate the lighter hulls from the heavier grains. The long-grain rice, the famous "Carolina Gold," had to be handled carefully to avoid breakage, as broken rice was of less ..." Rice Grain Quality and Marketing 1985 Page 6 "However, the export demand for broken rice prices in Thailand is almost as high as for medium-quality whole rice, due to rapidly increasing demand for broken rice in West Africa, mentioned earlier. Thailand broken rice is long-grain, clean and ..." and so are preferred by poorer consumers, but they are also eaten by choice, with some cookbooks describing how to break unbroken rice to produce the desired texture or speed cooking.
Broken rice is consumed as part of local cuisine in West Africa (where the traditional African rice is easier to break), Thailand, Bangladesh and elsewhere in South East Asia. In Vietnam, cơm tấm (literally "broken rice") is a popular rice dish with pork. Thieboudienne is a popular dish in west Africa often made with broken rice. Broken rice is called rice grist or in South Carolina. In Bangladesh it is called khood. It is typically dressed with roasted peppers, garlic and mustard oil.
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