Development of a functional snack food product with high nutritive value by extrusion method

The aim of this study is to produce a puffed, cereal-based snack; which was composed of corn flour, cornstarch, oat flour, chickpea flour, carrot powder and hazelnut; in order to balance the nutritional elements by combining different groups of food. The mixture whose composition and percentage of the components were extruded by using a co rotating twin screw extruder (A Werner & Pfleiderer (Stuttgard, Germany). Extrusion parameters were as fallows: Moisture between 11-15%, screw speed between 220- 340 rpm, and feed rate between 22-26 kg/h. Extruder temperature was set to 110 oC. The effects of the extrusion parameters on the products? functional, physical, textural, and sensorial properties were examined. In determining the optimum product, the maximum values of starch gelatinization, expansion ratio and sensory score of general acceptability and the minimum values density and mechanical cutting force were taken into consideration. According to compositional analyses the average percentage moisture, ash, protein, fat, carbohydrate and dietary fiber were found as follows: 7,27; 1,75; 14,54; 4,84; 71,61; 13,22, and energy value was calculated as 338 kcal/100g. The average percentage of the products? energy from protein, fat, and carbohydrate were determined in the order of 15, 11,2 and 73,8 respectively. The protein quality score of the mixture was calculated with chemical point method and was found as %73,7.