Nei Appam

The sweet belongs to Karthigai Deepam, among the oldest surviving Tamil festivals, whose lamp-lighting ritual is named in the classical Tamil poetry of the Sangam age, roughly 200 BCE to 300 CE. It falls on the full-moon night of the Tamil month Karthigai, when the moon aligns with the Krittika star cluster, the Pleiades. Dedicated to Shiva and to his son Murugan, whom legend has the six Krittika stars nurse as six infants later fused by the goddess Parvati into one six-faced child, the festival fills homes and temples with rows of oil lamps, and at Tiruvannamalai a great ghee flame, the Maha Deepam, is lit atop Arunachala hill. Nei appam is the household's principal sweet neivedyam, or god-offering, of the night, cooked in ghee because the season and its lamps both turn on clarified butter; the same cakes reappear at Krishna Jayanti and Ganesh Chaturthi. Its name is plain Tamil, nei for ghee and appam for a small rice cake, and though it shares that second word with Kerala's fermented appam, the two are wholly separate dishes.

Bite through a thin, ghee-crisped shell into a warm, cake-soft crumb that tastes of dark jaggery and banana, with cardamom and a whisper of dry ginger rising as the ghee coats the tongue. The edges are almost toffee-chewy where the sugar has caught, while the center stays moist and just short of pudding-soft.

Ripe banana is the engine. As it ripened, ethylene switched on amylase enzymes that broke its starch down into sugars, so the pulp brings sucrose, glucose and fructose, moisture and a little pectin without needing much added leavening. In the batter the rice flour's starch granules drink up the warm jaggery syrup and swell; when they meet the hot ghee they gelatinize and set into a tender crumb, while a pinch of baking soda releases carbon dioxide to keep it open. At the surface the abundant sugars from both jaggery and banana caramelize and react with the batter's traces of protein in Maillard browning, building the deep-brown, faintly bitter-edged crust. Ghee, with its high smoke point of roughly 250 degrees Celsius, lets the outside brown hard without scorching, and the enclosed dome of the paniyaram mold traps steam to cook the interior through even as the base fries.