Yes, dusting jaggery cubes with a light coating of flour, cornstarch, or powdered sugar can help prevent them from sticking together, especially in humid conditions.
Jaggery, being a natural sweetener, is hygroscopic, meaning it readily absorbs moisture from the air. This absorbed moisture can cause the jaggery cubes to become sticky and clump together. Dusting them with a dry powder like flour, cornstarch, or powdered sugar creates a barrier between the cubes, preventing them from directly contacting each other and absorbing moisture. The powder acts as a desiccant, absorbing any excess moisture and keeping the jaggery cubes dry and separate. This method is particularly effective in environments with high humidity. The thin coating of powder doesn't significantly alter the taste or texture of the jaggery.
Store the dusted jaggery cubes in an airtight container in a cool, dry place. This will further minimize moisture absorption and prevent sticking, extending the shelf life of your jaggery.