The invention belongs to the field of soybean sauce and provides soybean sauce and a preparation method thereof.The soybean sauce comprises 100 g of
perilla frutescens, 150 g of bay leaves, 500 g of celery, 100 g of
pericarpium citri reticulatae, 200 g of black fermented soya beans, 300 g of dried bean curd
skin, 100 g of soybeans, 500 g of pepper, 250 g of dried squids, 100 g of fructus amomi, 100 g of
amomum cardamomum, 200 g of salt, 1000 g of light soy sauce, 300 g of chicken essence and 20 jin of water. The water is boiled together with
perilla frutescens, bay leaves, celery,
pericarpium citri reticulatae, black fermented soya beans, dried bean curd
skin, soybeans, pepper, dried squids, fructus amomi and
amomum cardamomum; by adding herbaceous plants such as purple perilla and bay leaves, seafood raw materials such as dried squids and spices such as pepper and round cardamom, a three-dimensional
flavor system of herbal, seafood and spices is constructed, the content of volatile
aroma components of the soy sauce is increased, the content of
amino acid nitrogen is increased, perfect balance of freshness, fragrance,
sweetness and salty is achieved, and the
flavor of the soy sauce is improved. And the product is endowed with unique
flavor memory points.