What is the key ingredient that gives dosa its distinct taste?

Dosa, a popular South Indian delicacy, owes its unique flavor to the fermentation process of its batter. The primary ingredient, rice, undergoes fermentation along with urad dal (black lentils) and sometimes fenugreek seeds. This fermentation process not only imparts a tangy flavor but also aids in making the dosa crispy on the outside and soft on the inside. It’s this perfect balance of fermentation and cooking technique that makes dosa a quintessential South Indian favorite.