Urad dal is best stored whole to preserve its freshness and flavor for a longer period. Ground urad dal tends to lose its aroma and can become stale more quickly.
Storing urad dal whole protects the inner part of the bean from exposure to air and moisture, which are the primary factors that cause spoilage and loss of flavor. When urad dal is ground, a much larger surface area is exposed, accelerating the oxidation process and leading to a quicker decline in quality. Whole urad dal retains its natural oils and inherent flavors more effectively, ensuring that when you grind it for use, you get the freshest possible product. Think of it like coffee beans – whole beans stay fresher longer than pre-ground coffee. The same principle applies to urad dal.
Store whole urad dal in an airtight container in a cool, dark, and dry place. Adding a few dried red chilies or bay leaves to the container can help deter pests and further extend its shelf life.