Unopened tamarind paste can be stored at room temperature in a cool, dark place. Once opened, it should be refrigerated to prevent spoilage.
Tamarind paste, in its commercially prepared form, often contains preservatives that allow it to be stored at room temperature before opening. The high acidity of tamarind also contributes to its preservation. However, once the jar or container is opened, the paste is exposed to air and potential contaminants, which can lead to mold growth or fermentation. Refrigeration significantly slows down these processes, extending the shelf life of the opened tamarind paste. To maximize its freshness, transfer the opened paste to an airtight container before refrigerating. This helps to prevent it from drying out or absorbing odors from other foods in the refrigerator. Check the packaging for specific storage instructions, as some brands may have unique recommendations.
If you only use tamarind paste occasionally, consider freezing it in small portions using an ice cube tray. Once frozen, transfer the cubes to a freezer bag for easy access and to prevent freezer burn. This way, you can thaw only the amount you need, minimizing waste and preserving the quality of the paste.