The HSN (Harmonized System of Nomenclature) code for soups and broths, including soup and broth preparations, is 2104.
Here is a description:
21: Miscellaneous food preparations
04: Soups and broths and their preparations; homogenous mixed food preparations
Specifically, soups can be classified under:
2104.10: Soups and broths and their preparations
For GST purposes in India, the GST rate for items classified under HSN code 2104.10 is generally 18%.