Xì Dầu Tràng An Đặc Biệt is a long-fermented sauce produced by the An Thịnh Phát agricultural and food-processing cooperative in Ninh Bình Province. It is a special and thicker version of the traditional Xì Dầu Tràng An sauce. Its main ingredients include peanuts, soybeans, glutinous rice, water and salt. Soybeans are also used to prepare the natural fermentation culture that initiates the breakdown of the plant-based ingredients. Production combines a traditional local method with modern equipment that provides better control over hygiene and product consistency. The prepared mixture is left to ferment and mature for an extended period. The finished sauce has pronounced saltiness, a fermented aroma and an umami character created through the gradual breakdown of proteins from soybeans and peanuts. It can be served directly as a dipping sauce or combined with garlic and chili. It is also suitable for seasoning rice, vegetables, noodles, marinades and various cooked dishes.