Optimasi Formula Tahu Sutra Kedelai Hitam Instan dalam Pengembangan Wedang Tahu Instan

Abstract

Currently, silk tofu dessert is available in instant form and has been commercialized even though the product is still limited. Generally, silk tofu dessert uses yellow soybeans as the basic ingredient of silk tofu and the addition of brown sugar in ginger syrup. Black soybean with better functional properties than yellow soybean can be used as the main ingredient of silk tofu. Ginger syrup with the addition of milk can give a brighter and more attractive color when combined with black soybean silk tofu. The diversification was conducted as an effort to develop new findings from instant silk tofu dessert. This study aimed to obtain the optimum formula of instant black soybean silk tofu based on texture profile responses, selected formula of instant milk ginger syrup, identify the sensory, physical, chemical characteristics, and antioxidant capacity. Optimization of instant black soybean silk tofu formula was conducted by using Response Surface Methodology (RSM) provided by Design-Expert® ver.12.0.3 software. The result of optimum formula consisted of 91.32% black soybean powder, 6,36% carrageenan, and 10.33 times amount of rehydration water with desirability value of 1.00. The selected formula got responses value of 375.90 gf of hardness, 52.40 gf of gumminess, and 0.64 of springiness. The formula of instant milk ginger syrup was selected based on Focus Group Discussion (FGD), namely red ginger:emprit (50:50), sugar:ginger juice (1:1), skim milk powder 10%, and rehydration water:milk ginger powder (5:1). Consumption of instant silk tofu dessert in 30 g serving size generated total energy 120 kkal, 12% AKG of protein, 2% AKG of total fat, and 7% AKG of carbohydrate. The antioxidant capacity of instant silk tofu dessert was 66,66 ppm AEAC, IC50 value was 2376,59 ppm and total phenol content was 0,30 mg GAE/g. Hedonic rating value of sensory analysis of instant silk tofu dessert had a preference level that was still acceptable to the panelists and not significantly different (p>0.05) from traditional silk tofu dessert.