Abstract:
The objective of this research is to develop a deep fried corn mixed tempeh to produce a high dietary fiber snack. Suitable size of soybean seed was studied by using ground and half seed. The study show that ground soybean tempeh gave the highest firmness of 282.61 gf therefore ground soybean was selected to produce the later tempeh mixed with corn. Two varieties of corn, namely sweet corn and waxy corn were chosen to use in the tempeh mixture. The size of corn seed was varied to full, half and quarter size. The quarter kernel of sweet corn gave the highest firmness of 319.61 gf therefore quarter kernel of sweet corn was selected to mix with ground soybean. In next experiment, the ratio of mixture of soybean and corn was developed by vary soybean and corn to 5:0 4:1 3:2 2:3 1:4 and 0:5 (wet basis). The soybean and corn mixture of 3:2 had the highest acceptability score. It contained 16.48% (dry basis) dietary fiber and 23.65% (dry basis) protein content. The dietary fiber and protein content was improved from using soybean of corn alone to make tempeh. Optimum condition of pre-drying (60°C 32%RH) and frying (180°C) was investigated. Three conditions consisting pre-drying 0 min and frying 2 min, pre-drying 15 min and frying 1.5 min and pre-drying 30 min and frying 1 min were used to obtain the final product which contained 3% moisture content. Corn mixed tempeh which had been pre-dried at 30 min and fried for 1 min was found to have the highest overall acceptance sensory score and lowest fat content. However, the crispness was not significant different between each treatment (p>0.05). The shelf-life of the final product (corn mixed tempeh, 3:2, pre-drying 30 min and frying 1 min at 30°C) was found to be 21 days.