Modified arrowroot starch and glucomannan for preserving physicochemical properties of sweet bread

ABSTRACT Sweet bread is associated with smooth texture and high carbohydrate content, tasty and filling - quality that makes it preferred for snack. The key is in formulating raw material and other components. Commonly, sweet bread has short shelf life. Frozen dough could be the solution to this problem, and glucomannan addition during freezing process should be able to improve its physicochemical characteristics. This research aims to determine the effect of adding modified arrowroot (Maranta arundinacea L.) starch (MAS) as substitution, and glucomannan as frozen dough cryoprotectant toward sweet bread’s physicochemical. Randomized Complete Block Design Factorial (RCBD) was applied, and two factors were studied. The first factor was modified arrowroot starch (0.00%, 3.75%, and 7.50%) and the second was glucomannan (0.0%, 0.5%, and 1.0%). The best result was combination between MAS 3.75% and glucomannan 0.5%, reaching dough expansion volume range of 50% to 60%, bread expansion volume range of 77% to 80%, hardness range of 2 N mm-2 to 3 N mm-2, elasticity range of 88% to 96%, moisture content of 16% to 19%, ash content of 1.4% to 1.7%, fat content of 10% to 15%, protein content of 5%, and carbohydrate content of 51% to 66%. MAS is able to substitute wheat flour in bread production only if it is combined with glucomannan.