This study was conducted to optimization the ingredient mixing ratio rice custard cream using the response surface methodology.
For the experimental design methodology, a total of 16 samples mixing ratios selected using central composite design, leve...
This study was conducted to optimization the ingredient mixing ratio rice custard cream using the response surface methodology.
For the experimental design methodology, a total of 16 samples mixing ratios selected using central composite design, level of rice flour (180g, 220g, 260g), sugar(220g, 270g, 320g) and sorbitol(0g, 45g, 90g) selected including the replicate point of central composite. According to the results of measuring the quality characteristics of rice custard cream, in moisture (Liner, R2=0.7634, p-value 0.0006), sweetness (2FI, R2=0.9000, p-value <0.0001), pH (Quadratic, R2=0.8444, p-value 0.0049), viscosity (Liner, R2=0.5695, p-value 0.0148), and L value (Liner, R2=0.8249, p<0.0001), the goodness-of-fit of model was accepted. According to the results of measuring the sensory characteristics of rice custard cream, except color preference, in taste (Quadratic, R2=0.9467, p<0.0001), flavor (Quadratic, R2=8444, p<0.0099), hardness (Quadratic, R2=0.8061, p-value 0.0007), and overall acceptability (Quadratic, R2=0.9233, p<0.0028), the goodness-of-fit of model was accepted.
The optimal point of rice custard cream, which was predicted so, was determined to be the rice flour of 218.4g, the sugar of 275.3g, and the sorbitol of 44.7g as the optimal production condition.
This study set up the optimized rice custard cream as the experimental group and the cream produced with the custard sold on the market as the control group, and so tested quality characteristics and sensory characteristics.
In sensory characteristics near center point, color(4.75~6.53), egg flavor(5.13~7.10), vanilla flavor(4.08~5.35) and after taste(4.50~4.55) was felt to be near the strength of 'weak'. The strength of sweetness was 7.48~7.83, the strength of hardness was 7.38~7.53, and the strength of greasiness was 7.68~8.70, which was shown within the range of 'ordinary'.
According to the results of analyzing the relationship between sensory characteristics and preferences, overall preference had color preference (r=0.41, p<0.01), taste preference (r=0.70, p<0.001), and flavor preference (r=0.85, p<0.001) significantly correlations.
According to the results of comparing rice custard cream and custard cream sold on the market, in overall preference, rice custard cream tended to be slightly higher. In color, taste, flavor, and viscosity, rather the optimized rice custard cream was significantly higher.
This study purpose is to develop new rice processing foods. The new rice processing foods is rice custard cream. So rice custard cream material rice, sugar and sorbitol content were different. According to such results, such custard cream had its sufficient competitiveness in the aspects of quality and acceptance and had the possibility of new rice processing food.