The original soup of Lanzhou beef noodles refers to the stock made of beef bones. Usually, beef bones are boiled in a casserole and simmered for several hours with water to extract bone marrow and nutrients from beef bones. The soup base made of this original soup is usually turbid and white, delicious and rich in beef flavor. Original soup is an important part of Lanzhou beef noodles, which determines the flavor of Lanzhou beef noodles.
Pure soup refers to clear soup without any additives, that is, only beef bones are boiled with clear water, and the boiled soup is clear. Compared with the original soup, the taste of the pure soup is lighter, and there is no rich beef flavor of the original soup.
Generally speaking, the original soup of Lanzhou beef noodles is more rich and the beef flavor is rich; Pure soup, on the other hand, tastes light, which is more suitable for people who like light taste. The choice of soup base mainly depends on personal taste preference.