Kavuni Arisi Idly Recipe

Rinse and soak

Rinse kavuni arisi (black rice) in several changes of water until the water runs mostly clear to remove surface starch and dust. Rinse the parboiled white rice separately until water runs clear. Rinse the whole urad dal and fenugreek seeds together. In three separate bowls, soak kavuni arisi and parboiled rice together (you can mix them while soaking) in enough water to cover by 2–3 cm and soak for 4–6 hours. Soak the urad dal with fenugreek seeds in about 2 cups water for 4–6 hours (the dal should swell).

Drain and prepare for grinding

After soaking, drain the kavuni arisi/parboiled rice and reserve the soaking water. Drain the urad dal and fenugreek and reserve that soaking water separately. Use fresh or reserved water for grinding as needed to get a smooth but thick batter.

Grind the urad dal

Grind the soaked urad dal and fenugreek seeds first in a wet grinder or high-power blender. Add about 1/2 to 3/4 cup of the reserved dal soaking water (or fresh water) gradually while grinding. Grind until the dal becomes smooth, soft, and fluffy — it should form a soft ribbon-like consistency and increase slightly in volume. This may take 15–25 minutes in a traditional wet grinder or 4–6 minutes in a high-speed blender in short pulses; scrape sides as needed.

Grind the rice

Grind the soaked kavuni arisi and parboiled rice mixture in batches. Add about 1 to 1 1/4 cups of reserved rice soaking water gradually while grinding to reach a slightly coarse-smooth idli batter texture (fine but with a little body). The kavuni arisi will color the batter deep purple; ensure rice is well ground and there are no hard grains. Total grinding time about 10–20 minutes depending on grinder.

Combine and ferment

Transfer both batters to a large clean bowl. Mix the urad dal batter and rice batter thoroughly by folding and aerating with a spatula or by hand (with very clean hands) until homogeneous. The combined batter should have a slightly thick but pourable idli-batter consistency. Add 1 to 1 1/2 teaspoons of salt and mix. Cover the bowl with a lid or plate and place in a warm, draft-free spot (about 30–38°C / 86–100°F) to ferment for 8–12 hours or until doubled in volume and slightly bubbly. Fermentation time varies with ambient temperature; in cooler climates leave 12–18 hours or use a warm oven/instant pot on yogurt setting.

Adjust batter after fermentation

After fermentation, gently fold the batter and check consistency. If too thick, add 2–4 tablespoons of water and mix to reach spoonable but thick flowing consistency suitable for idli molds. Taste and adjust salt if needed.

Steam idlis

Grease idli molds lightly with oil or ghee. Pour batter into idli molds filling about 3/4 full. Bring a steamer or idli cooker with 1–2 cups water to a rolling boil. Place the idli stand in the steamer, cover, and steam on medium-high heat for 10–12 minutes for small/medium idlis, or 12–15 minutes for larger idlis. Do not open the lid in the first 8 minutes to prevent collapse. To check doneness, insert a toothpick — it should come out clean. Turn off heat and let sit covered for 2–3 minutes.

Demold and serve

Using a spoon or butter knife, gently scoop around each idli and remove from the mold to a plate. Kavuni arisi idlis will be dark purple/black in color. Serve warm with chutney and sambar, or proceed to optional tempering garnish.

Heat sesame oil or ghee in a small pan over medium heat. When hot, add mustard seeds. When they begin to pop, add the urad dal (if using) and fry until light golden-brown. Add curry leaves and briefly sauté until crisp (a few seconds). Add grated coconut, chopped cilantro, and grated ginger; toss for 10–20 seconds to warm the coconut and meld flavors. Turn off heat. Spoon this tempering over hot idlis or serve on the side. The warm coconut-tempering with curry leaves complements the nutty, slightly floral flavor of the kavuni arisi idli.