Kosha Mangsho (Slow-Cooked Caramelised Mutton)

Ingredients

• 1 kg Mutton (leg pieces with bone) (Include a good proportion of meat, fat and bone for flavor)
• 10 pcs Garlic cloves (Will be crushed into a paste with green chilies)
• 40 g Ginger paste (Fresh ginger grated or store‑bought paste)
• 5 pcs Green chilies (About 20 g, adjust to heat preference)
• 150 g Plain yogurt (Use full‑fat for richness; can increase to 200 g for more tang)
• 10 g Salt (for marination) (Adjust to taste)
• 5 g Turmeric powder
• 5 g Shahi garam masala
• 3 g Kashmiri red chili powder (Mild, gives color)
• 3 g Coriander powder
• 3 g Cumin powder
• 20 ml Mustard oil (Heat until it lightly smokes; gives characteristic flavor)
• 1 pod Whole spices – big (black) cardamom
• 1 large Cinnamon stick
• 10 pcs Cloves
• 4 pcs Dried red chilies
• 6 pcs Bay leaves
• 1 pod Black cardamom
• 10 pods Green cardamom
• 400 g Sliced onions (About 2 large onions, sliced thick for caramelisation)
• 10 g Sugar
• 8 g Salt (for cooking) (Adjust at the end if needed)
• 100 g Ghee (clarified butter) (Finishing butter for shine and richness)
• 1 liter Water (Added gradually during simmering)

Instructions

1. Marinate the mutton

   In a mixing bowl combine the mutton pieces with yogurt, 10 g salt, turmeric, shahi garam masala, ginger paste, crushed garlic‑green‑chili paste, and a pinch of green cardamom. Mix until the meat is evenly coated, cover and refrigerate.

   Time: PT30M

   Temperature: 25°C

2. Prepare the spice paste

   Using a mortar‑pestle or the side of a chef’s knife, crush the garlic cloves together with the green chilies into a smooth paste.

   Time: PT5M

3. Heat mustard oil

   Place the pot over high heat, add 20 ml mustard oil and heat until it lightly smokes and turns a pale yellow.

   Time: PT2M

   Temperature: high (≈200°C)

4. Temper whole spices

   Add dried red chilies, bay leaves, big (black) cardamom, black cardamom, cloves and the cinnamon stick. Fry for about 2 minutes until fragrant.

   Time: PT2M

   Temperature: medium‑high

5. Caramelise the onions

   Add the sliced onions to the pot. Fry, stirring frequently, until they turn a deep, rich brown – about 30 minutes. This slow caramelisation builds the curry’s body.

   Time: PT30M

   Temperature: medium‑high

6. Brown the marinated mutton

   Increase the heat to high and add the marinated mutton. Stir constantly and brown the pieces for about 15 minutes until they develop a deep mahogany colour.

   Time: PT15M

   Temperature: high

7. Add salt and sugar for controlled browning

   Sprinkle 8 g salt and 10 g sugar over the meat. Continue to fry for another 10 minutes, stirring often. The sugar helps achieve a glossy, caramelised surface without burning.

   Time: PT10M

   Temperature: high

8. Slow simmer with incremental water

   Place a 1‑liter jar of hot water nearby. Add roughly 30 ml of hot water to the pot, stir, cover for 1 minute, then uncover and scrape the browned bits from the bottom. Repeat this process over the next 2 hours, adding water in small increments each time, until the meat is dark and the flavors have melded.

   Time: PT2H

   Temperature: medium

9. Adjust gravy and finish cooking

   Add additional water to reach your desired gravy consistency (usually 200‑300 ml). Cover and simmer on low‑medium heat until the meat is fork‑tender and can be pulled apart with two fingers, about 30 minutes.

   Time: PT30M

   Temperature: low‑medium

10. Finish with ghee

    Stir in 100 g ghee until fully melted and incorporated. Let the curry rest for 5 minutes before serving.

    Time: PT5M

Nutrition Facts

Calories

500

Protein

35 g

Carbohydrates

15 g

Fat

30 g

Fiber

2 g

Ingredient Substitutions

• Instead of Mutton (leg pieces with bone): Lamb shoulder
• Instead of Garlic cloves: Garlic paste
• Instead of Ginger paste: Fresh grated ginger
• Instead of Green chilies: Jalapeño, Serrano
• Instead of Plain yogurt: Greek yogurt, Kefir
• Instead of Salt (for marination): Sea salt
• Instead of Turmeric powder: Fresh turmeric
• Instead of Shahi garam masala: Garam masala
• Instead of Kashmiri red chili powder: Paprika + a pinch cayenne
• Instead of Coriander powder: Fresh cilantro (different flavor)
• Instead of Mustard oil: Vegetable oil (flavor will change)
• Instead of Cinnamon stick: Cassia
• Instead of Dried red chilies: Fresh red chilies
• Instead of Sliced onions: Shallots
• Instead of Sugar: Honey
• Instead of Salt (for cooking): Sea salt
• Instead of Ghee (clarified butter): Clarified butter, Unsalted butter

Equipment Needed

• Heavy‑bottomed pot or Dutch oven (5‑6 L)
• Sharp chef’s knife
• Cutting board
• Mixing bowl (for marination)
• Wooden spoon or heat‑proof spatula
• Measuring spoons / scale
• Lid for the pot
• Heat‑proof jar (1 L) for hot water (optional)

Critical Steps — Do Not Skip

• Marinating the mutton with yogurt and spices
• Caramelising the onions for 30 minutes
• Deep browning of the meat with sugar
• Gradual addition of hot water and scraping the fond

Chef Tips from the Video

• Use a heavy‑bottomed pot to prevent scorching during the long caramelisation.
• A splash of tamarind paste at the end adds a subtle tang without extra yogurt.
• Serve with mishti polao or plain basmati rice to balance the richness.

Troubleshooting

Storage

Refrigerator: Store in an airtight container for up to 3 days.

Freezer: Freeze in portions for up to 2 months.

Room temperature: Do not keep at room temperature for more than 2 hours.

Make-Ahead Tips

• Marinate the meat overnight for deeper flavor.
• Caramelised onions can be prepared a day ahead and stored in the fridge.