Anthocyanins‐rich extracts from the black soybeans coat (AEBSC) at five levels of 0%, 2.5%, 5%, 7.5%, and 10% were added to wheat flour to make noodles. The results showed the storage moduli (Gʹ) and loss moduli (Gʺ) of the dough decreased, and the maximum creep compliance (Jmax), instantaneous compliance (J0), and retardation compliance (J1) of the dough gradually enlarged with the increasing addition of AEBSC. When the addition of AEBSC was 2.5% and 5%, the texture of the noodles such as hardness, elasticity, cohesiveness, chewiness, and resilience was insignificantly changed (p > 0.05) and the dough's three‐dimensional structure still existed. When the AEBSC was added at 7.5% or 10%, the texture of the noodles was significantly changed (p < 0.05) and the gluten protein's network structure was destroyed. The findings showed the feasibility of adding 5% AEBSC in wheat dough for acceptable physicochemical properties.
Practical applications
Anthocyanins‐rich extracts from the black soybeans coat is a kind of natural flavonoids, which is beneficial to human body. Anthocyanin's strong antioxidant activity determines its wide market demand. As a traditional staple food, noodles are popular with consumers all over the world. The addition of anthocyanins‐rich extracts in noodles can improve the nutritional value of noodles. This study found that adding 5% anthocyanins‐rich extracts can better maintain the quality of noodles and enhance the nutritional characteristics of noodles, which provides a theoretical basis for its application in noodle products.