Old Delhi Style Slow-Cooked Mutton Curry (Railway Mutton)

🌍 Cuisine: North Indian
🏷️ Category: Main Course
⏱️ Prep: 30 minutes
🍳 Cook: 90 minutes
👥 Serves: 4-6 servings

📝 About This Recipe

This soul-warming Mutton Curry is a tribute to the rich, aromatic heritage of North Indian slow-cooking, where bone-in meat is simmered until it reaches butter-soft perfection. The secret lies in the 'Bhuna' process—meticulously frying the spices and onions until the oil separates, creating a deep, mahogany gravy infused with cardamom, cinnamon, and cloves. It is an assertive, fragrant dish that balances the gaminess of the mutton with a velvety tomato-onion base, making it the ultimate centerpiece for a festive dinner.

🥗 Ingredients

The Meat & Marinade

  • 2 lbs Mutton (Goat Meat) or Lamb (cut into 1.5-inch pieces, bone-in preferred for flavor)
  • 1/2 cup Greek Yogurt (whisked until smooth)
  • 2 tablespoons Ginger-Garlic Paste (freshly ground for best aroma)
  • 1/2 teaspoon Turmeric Powder
  • 1 teaspoon Salt (adjust to taste)

Whole Spices (The Aromatics)

  • 4 tablespoons Ghee or Mustard Oil (Mustard oil provides a traditional pungent kick)
  • 2 pieces Bay Leaves
  • 2 pieces Black Cardamom (cracked open)
  • 4 pieces Green Cardamom
  • 1 inch Cinnamon Stick
  • 5 pieces Cloves

The Curry Base

  • 3 large Red Onions (very thinly sliced)
  • 2 medium Roma Tomatoes (finely pureed)
  • 1.5 tablespoons Kashmiri Red Chili Powder (for vibrant color and mild heat)
  • 2 tablespoons Coriander Powder
  • 1 teaspoon Cumin Powder (roasted)
  • 1 teaspoon Garam Masala (added at the end)
  • 1/4 cup Fresh Cilantro (finely chopped for garnish)
  • 3 pieces Green Chilies (slit lengthwise)

👨‍🍳 Instructions

  1. 1

    In a large mixing bowl, combine the mutton pieces with yogurt, ginger-garlic paste, turmeric, and salt. Massage the marinade into the meat and let it rest for at least 30 minutes (or overnight in the fridge) to tenderize.

  2. 2

    Heat the ghee or mustard oil in a heavy-bottomed pot or Dutch oven over medium-high heat. If using mustard oil, heat until it reaches smoking point, then let it cool slightly before proceeding.

  3. 3

    Add the whole spices (bay leaves, black and green cardamom, cinnamon, and cloves). Sizzle for 30-45 seconds until they become fragrant and slightly swell.

  4. 4

    Add the sliced onions to the pot. Sauté them on medium heat for 15-20 minutes, stirring frequently. This is the most crucial step; the onions must be a deep golden brown, not just translucent.

  5. 5

    Increase the heat to medium-high and add the marinated mutton. Sear the meat for 8-10 minutes, stirring constantly. This 'Bhuna' process locks in the juices and browns the meat beautifully.

  6. 6

    Add the Kashmiri chili powder, coriander powder, and cumin powder. Splash a tablespoon of water if the spices start to stick to the bottom.

  7. 7

    Stir in the tomato puree and green chilies. Continue to cook for another 5-7 minutes until the oil starts to separate from the sides of the masala.

  8. 8

    Pour in 2 to 3 cups of warm water (depending on how much gravy you desire). Bring the mixture to a rolling boil.

  9. 9

    Reduce the heat to low, cover the pot with a tight-fitting lid, and simmer. For mutton, this usually takes 60-75 minutes; for lamb, 45-50 minutes. Check every 20 minutes to ensure there is enough liquid.

  10. 10

    Once the meat is fork-tender and falling off the bone, remove the lid. If the gravy is too thin, simmer uncovered for 5 minutes to thicken it to your liking.

  11. 11

    Sprinkle the garam masala over the curry and stir gently. Let it sit for 2 minutes to allow the flavors to meld.

  12. 12

    Turn off the heat and garnish generously with fresh cilantro. Let the curry rest for 10 minutes before serving—the flavors deepen as it sits.

💡 Chef's Tips

Always use room temperature meat to ensure even cooking and prevent the fibers from toughening. Don't rush the onions; the deep brown color of the onions provides the characteristic dark hue and sweetness to the gravy. If you are short on time, you can use a pressure cooker; cook for 6-8 whistles after the searing step, then finish with garam masala. Using bone-in meat is essential as the marrow releases gelatin during the long simmer, creating a rich, lip-smacking consistency. If the curry is too spicy, stir in a teaspoon of sugar or a dollop of heavy cream at the end to balance the heat.

🍽️ Serving Suggestions

Serve steaming hot alongside buttery Garlic Naan or Laccha Paratha for a classic experience. Pair with fragrant Basmati Jeera Rice (Cumin Rice) to soak up the flavorful gravy. Include a side of 'Kachumber' salad (diced cucumbers, tomatoes, and onions with lemon juice) for a refreshing crunch. A glass of chilled Mango Lassi or a salted Mint Chaas acts as a perfect palate cleanser. Add a dollop of cooling Cucumber Raita on the side to balance the robust spices.