The objectives of the research on the different egg age affecting the sponge cake were to study the appropriate different egg age to bake the sponge cake and examine the physical and chemical qualities of the sponge cake. The density of the different age cake was measures using the randomized complete block design (RCBD) method at 95% reliability. The quality of senses sight color smell taste and texture and the overall preference were evaluated. The difference of mean was compared with by Duncan New Multiple Rang Test (DMRT) using a computer program to find the appropriate different egg age to bake the sponge cake. 30 testers applied the 5- point hedonic scale to test the product. Research results showed that the testers preferred the egg age at 9 days the most. Ln terms of taste texture and overall preference the mean was 3.70 3.67 and 4.00 respectively. The physical quality test results indicated that the texture of the one-day egg age had the best adhesion and flexibility 0.54 and 0.94 respectively. The egg age at 12 days had the highest lightness (L*) yellowness (b*) and redness (a*) 50.61 4.71 and 23.99 respectively with the statistical significance (p).≤ 0.05

This study demonstrates a new concept of salted yolks processing using only the yolk directly with the egg white portion being further utilized. This salting process accelerated the salting time from 4 weeks for whole egg pickling to only 5 days. The results showed that the increasing of amount of salt and maltodextrin in the salt solution (20 and 26% of salt 10 and 20% of maltodextrin) and salting time (0-5 days) resulting in a decrease in the moisture content of the yolk as well as the increase in the amount of salt and fat content in salted yolk. These caused a lower in brightness (L*) and a yellow index (b*) while a higher red index (p<0.05) of salted yolk. Moreover salted yolk has higher hardness cohesiveness gumminess and chewiness while showed lower adhesiveness and springiness which the increasing of salt solution concentration and salting time (p<0.05). Pickling of egg yolks directly in a solution of 20% of sodium chloride mixed with 20% of maltodextrin resulted in the lowest salt content. The comparison of the chemical and physical quality for salted egg yolks this new separted yolk salting generated salted yolks of similar quality to those of commercial salted egg yolks which was produced using the traditional egg-shell method but lower in salt content (p<0.05). Thus this novel salting process can be a guideline for the development of an efficient low-salt egg yolk production method.