The objectives of this research were to prepare the syrup from the extracted yam bean and apply this syrup for adjusting the sweetness in the orange flavor drinking yogurt. The study made a yam bean extract concentrated by 3 difference heating methods; steaming boiling and boiled-evaporating. The results showed that a proper method was boiling yam bean extracted at a temperature of 90°C for one hour. The syrup was light brown color and not very strong smell of yam bean the total soluble solid was 20 °Brix and the non-reducing sugar content was 17.80 %. The drinking yogurt which was formulated using a ratio of set yogurt: orange juice (100%): yam bean syrup at 1:1:1 had the sensory properties (9-Point Hedonic Scale) higher than the ratio of 1:1:0.5 and 1:1:1.5 (p≤0.05). This drinking yogurt had a pH at 4.2 the total soluble solid was 15 °Brix protein was 1.75 % fat was 2.1% and non-reducing sugar content was 5.39 %. The microbiological properties passed quality standards (drinking yogurt) of Notification of the Ministry of Public Health No. 353 B.E 2556. The study of consumer acceptance on the drinking yoghurt with yam bean syrup showed that consumers had a preference for the product at like - most like level at 72 % acceptance on the product at 97 % and would buy this product at 76 %.

Fresh coconut syrup is a product from coconut spadix which has unique sweet taste and odor. Due to its short storage life it is usually processed into palm sugar. Development of new product from fresh coconut syrup would add more value by using it to produce crispy jelly. A suitable formula selected as a basic formula used 42.11 percent of refined sugar 56.14 percent of water and 1.75 percent of jelly powder. The basic formula was adjusted by calculating amount of water and soluble solids. Then a study was conducted to determine suitable amount of refined sugar heating period and drying temperature. It was found that a higher ratio of refined sugar and heating period led to increased concentration level of the mixture. As a result the crispy jelly had higher amount of sugar chips on the jellys surface and higher level of hardness. The highest score given by testers was for crispy jelly which used a ratio of fresh coconut syrup and refined sugar at 1:0.6 and 1:0.8 heating period of 5 minutes. Drying crispy jelly at higher temperature resulted in decreased drying period and higher degree of hardness. Drying at 70 degree Celcius produced crispy jelly with good quality which received the highest likeness score from testers. A study that kept crispy jelly in plastic box for at least 8 weeks showed that the tested condition could effectively maintain good quality of the crispy jelly.