Mor Kuzhambu (Buttermilk Curry)

Name: Mor Kuzhambu
Prep time: 15 min
Cook time: 10 min
Total time: 25 min
Yield: 4 servings
Cuisine: Indian (Tamilnadu)
Ingredients: 1.5 cups sour thick yoghurt (curd — must be sour, not fresh sweet curd); 200 g ash gourd (vellai poosanikai) or drumstick or colocasia (arbi / seppankizhangu), cut into 3 cm cubes; ¼ tsp turmeric powder; ¾ tsp salt; ½ cup fresh grated coconut; 1 tsp cumin seeds; 1 tsp black pepper, whole; 2–3 green chillies (green chillies only — no red chilli powder); 1 tbsp chana dal, soaked 20 min; 3 tbsp water; 2 tsp coconut oil; 1 tsp mustard seeds; ½ tsp fenugreek seeds; 2 dried red chillies; 2 sprigs curry leaves; ¼ tsp asafoetida; Never boil mor kuzhambu — the single most important rule. Low heat, patient warming only.; The yoghurt must be sour — freshly set sweet curd makes a bland, insufficiently tangy kuzhambu.; Fenugreek seeds in the tempering add a slight bitterness that balances the sourness of the yoghurt perfectly.; Ash gourd is the best vegetable for mor kuzhambu — its mild, slightly sweet flavour harmonises perfectly with the sour yoghurt.

🟢 Veg🌾 Gluten-free📊 Easy

A yoghurt-based curry with vegetables (ash gourd, drumstick, or colocasia) — a cooling, mildly tangy, light dinner kuzhambu that acts as the counterpoint to heavy spiced dishes in the Tamil meal. No tamarind; the sourness comes entirely from the yoghurt.

⏱️15 minPrep

🔥10 minCook

🕒25 minTotal

🍽️4Serves

🧺 Ingredients

👩‍🍳 How to make Mor Kuzhambu

Grind the mor kuzhambu paste (no heat): Grind grated coconut, cumin, pepper, green chillies, and soaked chana dal with 3 tbsp water to a very smooth paste. Strain the yoghurt if it has any lumps. Whisk the paste thoroughly into the sour yoghurt. Add salt. The mixture should be creamy and uniform.
Heat and combine (low heat — CRITICAL): In a wide pan on the lowest heat, add the cooked vegetables. Pour the yoghurt-coconut paste mixture over. Stir gently. Heat slowly on the lowest possible setting, stirring continuously. This is the most delicate step — yoghurt splits (curdles) if heated too quickly or stirred too roughly.
Watch for the right temperature (low heat, 8–10 min): The mor kuzhambu should be heated just until steam begins to rise from the surface and small bubbles appear at the very edges. It must NOT come to a boil — boiling causes the yoghurt to split irreparably into white curds and greenish water. When steam rises and edges are just beginning to bubble, turn off immediately.
Prepare tempering (high heat): Heat coconut oil. Add mustard seeds — crackle. Add fenugreek seeds (20 sec, reddish). Add red chillies, curry leaves, and asafoetida (15 sec). Pour over the mor kuzhambu. Stir once.
Serve immediately: Mor kuzhambu is served at a warm but not hot temperature. Pour over rice.

📖 Cultural notes

|---|---|---|---|---| | 160 kcal | 6 g | 14 g | 9 g | 2 g | Mor Kuzhambu is the distinctive Tamil Brahmin (Iyengar) kuzhambu — its pale yellow, creamy appearance and gentle sourness stand apart from the dark, bold, tamarind-based kuzhambus. In Iyengar Brahmin tradition, mor kuzhambu is a mandatory component of the auspicious meal served at vratas (fasting-breaking meals) and upanayanam (sacred thread ceremony) feasts. The dish's restraint — no red chilli powder, no tamarind, no onion in the traditional Iyengar version — reflects the sattvic cooking philosophy. It is also the ideal dinner dish for summer — its cooling properties are highly valued in Tamil Nadu's heat. ---

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