Kajian pemanfaatan tepung ubi jalar ungu (Ipomoea batatas (L) Lam.) dalam pembuatan spreads ubi jalar

Abstract

Purple sweet potato (Ipomoea babatas cv. Ayamurasaki) contains high amounts of anthocyanin. Processing purple sweet potato becoming flour will make it more available to be used in various product, like spreads. Aim of this research is to obtain flours with highest color intensity and anthocyanin content, an optimal recipe for producing sweet potato spreads, and describe characteristic of sweet potato spreads. The results showed that flour steamed 10 minutes and dried with sun light has the highest total anthocyanin (183,44 mg cyE/100g) and the best color appearance (L 40.25; a 13.29; b -3.74; ohue 344.37o; and C 13.81). Then, the purple sweet potato flour was used to make sweet potato spreads. Addition of 9% purple sweet potato flour and 0.6% glycerol monostearate with 30 minutes of mixing at 500C and 15 minutes of homogenization gave optimum emulsion stability for sweet potato spreads. Sweet potato spreads was divided into three different formula based on the ratio of shortening and oil. The result showed that ratio of shortening and oil had significant effect to spreadability, brightness, consumer acceptance, and emulsion stability of sweet potato spreads. Based on the fourth parameter, it was concluded that sweet potato spreads with 2:1 ratio of shortening to oil was the most optimum formula.