The phrase "black soybeans" refers to a type of soybean that has a dark black or purplish color. It is a specific variety of soybean that is used in cooking and can be found in various dishes and cuisines. Full definition
Assessment of bacterial communities of black soybean grown in fields — Akifumi Sugiyama, Communicative & Integrative Biology (microbiomedigest.com)
Ingredient Note: Black bean - garlic sauce, made from pureed salted and fermented black soybeans, is a widely used condiment in Chinese cooking and can be found with the Asian food in most supermarkets. (eatingwell.com)
Nasoya is its made - for - retail organic line, which includes tofu and tofu - plus made from black soybeans. (fooddrink-magazine.com)