Idli — Steamed Fermented Rice Cake (इडली)

Idli appears in Tamil Sangam literature (1st–3rd century CE) as a fermented rice preparation; its specific steamed cake form is documented in 10th-century South Indian texts; it spread across South India from a Tamil origin

Idli (इडली) is the steamed rice cake of South Indian cooking — the same fermented rice-urad dal batter as dosa poured into round molds and steamed for 10–12 minutes to produce soft, spongy, dome-shaped cakes. Where dosa cooks by spreading thin batter on a hot tawa (conductive heat from below), idli cooks by steam (wet heat from above), producing an entirely different result from identical batter: the steam creates an exceptionally light, airy, sponge-like texture that the tawa method cannot achieve. The quality of idli depends on the fermentation completing successfully and the steaming environment maintaining constant temperature without moisture condensation dripping back onto the idli.

• Idli's steamed fermented rice cake parallels Chinese steamed rice cakes (白糕, bái gāo), Japanese mochi steaming techniques, and the Malagasy mofo akondro — but idli's rice-urad lactic fermentation + steam-dome cooking is specifically South Indian

Idli's neutral, slightly sour flavour and light, spongy texture is designed to serve as the vehicle for sambar and chutney — it absorbs both completely, becoming saturated with the complex flavours while retaining its own texture. The idli with sambar combination has the highest daily consumption of any traditional Indian food.