Chinese sweet noodle sauce 甜面酱 (tián miàn jiàng)

This thick, dark brown sauce has a rich, savory flavor and is often used in marinades for meats or as a condiment. It is made from sweetened fermented soybeans. This is the sauce normally eaten with Peking duck, not hoisin sauce, which is sweeter. It is sometimes referred to as sweet bean sauce, sweet soybean paste, or sweet flour sauce. It is sold in jars at Asian grocery stores.