Hung Yen Ban Fermented Soybean Paste (Tuong Ban)

Tuong Ban (from Ban Yen Nhan, Hung Yen Province) is the undisputed king of traditional Vietnamese fermented soybean condiments, celebrated in classical folklore as a culinary jewel once presented as royal tribute to feudal monarchs. Crafted with ancestral patience in the fertile plains of the Red River Delta, it is revered for its deeply aromatic, earthy, sweet, and nutty character. Producing authentic Tuong Ban involves three simple, pure ingredients: yellow-flowered sticky rice, locally grown small-seed soybeans, and natural sea salt. The craft unfolds across three exacting stages: steaming sticky rice and nurturing a natural golden fungal mold (moc hoa cau); roasting soybeans to aromatic golden crispness and steeping them in rainwater within earthenware jars; and finally blending the mold into the jars for 1 to 3 months of solar fermentation, vigorously stirred under open skies daily. The finished condiment presents a luscious amber-brown honey-like consistency, exuding a fragrant roasted nuttiness and savory sweetness. It serves as an essential companion for Northern rustic dishes: dipping limestone mountain goat meat, boiled morning glory, or crispy fried tofu, and acting as the secret simmering agent for deeply caramelized braised river carp.