Traditional Food of India

1.5 Kadma

Several sugar/jaggery-based traditional Indian confectioneries are prepared at small/cottage scales and in domestic kitchens. Kadma is a traditional sweet of the Indian sub-continent that is made from sucrose (cane sugar). It is a ready-to-eat white candy popular in Eastern India and Bangladesh (Figure 1.5.1). Another name of kadma is kodma, and has a long shelf-life of 1 year or more if appropriately protected from moisture ingression. The prepared kadmas are nearly cylindrical shape with flattened closed surfaces at both ends resembling the orange shape.

Bright white colour and ridges on external surfaces are attractive features of kadma in addition to the low price. However, moisture absorption leading to a soggy surface and melting in humid weather are drawbacks of prepared kadma during storage. 

Method of preparation
Concentrated sucrose syrup is boiled, and the appropriate stickiness of the solution is the endpoint of heating (Figure 1.5.2). The hot solution is spread on the oil-smeared surface for partial cooling and to avoid sticking to surfaces. The warm dough mass thus obtained is repeatedly stretched, pulled and folded skillfully to obtain a long cylindrical mass having a diameter between 20 and 25 mm. A good extent of air is entrapped during these processes. It is skillfully cut to a length of 20-25 mm, and the small pieces are gently rolled over a thin bed of fine sucrose (sugar) powder to avoid surface stickiness. The finished product kadma is a hard brittle product that can melt easily in the mouth. The product has thin ridges at the outer surface to have an attractive appearance. The product is a delicacy and is used during festivals including social and religious functions. Special big-size kadmas, with diameters varying between 50 and 200 mm, are also prepared if made to order. If moulds are used, special shapes and sizes can also be prepared to obtain different varieties.

Machinery
Steam-jacketted kettle with the stirring facility for heating of sugar solution, gadget for stretching, pulling and folding of sugar dough, and cutting of kadma pieces to required sizes and packaging units are needed. 

Requirements

  • Some processing steps of kadma preparation may be mechanised which helps to maintain hygienic conditions and avoid handling of the hot mass using hands.
  • Kadmas are sensitive to moisture present in the surroundings. They can absorb a good quantity of moisture during the rainy seasons that may be controlled by using suitable packaging material having good moisture barrier properties.
  • Technological data regarding dough rheology at different temperatures, physical and thermal properties, and moisture sorption data including the critical moisture content of the product are not available. Research attention is needed in these aspects including the packaging requirement.

The hygroscopic nature of kadma may be decreased by providing a thin layer of oil or wax, or a protein-based film after the preparation of the product.

The level of sugar may be reduced by using suitable sugar substitutes.

Further reading
Bhattacharya, S. (2022). Snack foods: Processing and Technology. Academic Press (Elsevier), London, UK.

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