soybeans

Soybeans (Glycine max) are legumes native to East Asia, cultivated for millennia in China, Japan, and Korea before spreading globally. They are small, oval seeds housed in fuzzy pods, ranging in color from yellow, black, to brown, with white or yellow cotyledons when shelled. The yellow variety is most commercially significant. Soybeans contain approximately 35–40% protein and 20% oil by dry weight, making them nutritionally distinctive among legumes. The flavor profile is mild and slightly earthy, becoming more pronounced when processed into fermented products. The beans have a firm texture that softens substantially when cooked.

Soybeans are highly versatile in processing: they are pressed for oil, fermented into miso, soy sauce, and tempeh, or coagulated into tofu. The composition and properties vary among cultivars, affecting their suitability for different food applications.

Soybeans feature prominently in East Asian cuisines, where they are consumed as whole cooked beans, sprouted, or processed into protein-rich staples. Fresh green soybeans (edamame) are boiled and salted as a snack or appetizer. Dried soybeans are simmered in soups, stews, and rice dishes, particularly in Japanese and Chinese cooking. The fermented products—miso, soy sauce, tempeh, and natto—serve as fundamental seasonings and proteins across regional dishes. Soy milk and tofu derived from soybeans provide plant-based alternatives in both traditional and modern cuisines. In Western cooking, soybeans increasingly appear in vegetarian and plant-based preparations. They pair well with ginger, garlic, sesame, and umami-rich ingredients.