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Tom Kha Gai (Coconut Soup)

Tom kha gai, or coconut soup, is a sour and spicy soup made with chicken, coconut milk, and a variety of tropical herbs and vegetables. Galangal, lemongrass, kaffir lime leaves, and Thai chilies flavor this aromatic dish that has become famous around the world.

Recipe Servings: 4

Prep Time
30 minutes
Cook Time
40 minutes
Total Time
1 hour 10 minutes
Vegetarian
Vegan
Gluten Free
Dairy Free
Kosher
Halal

Ingredients

  • 1 ½-inch (4-cm) piece galangal
  • 3 stalks lemongrass
  • 6 cups (1.5 L) coconut milk, divided
  • 2 medium chicken breasts
  • 5–10 Thai chile peppers
  • 2 large handfuls oyster mushrooms
  • 2 small white onions
  • 2 tomatoes
  • 6 kaffir lime leaves
  • ½ tsp (2.5 ml) salt, more to taste
  • Small bunch of fresh cilantro
  • 4 Tbsp (60 ml) fresh lime juice

Directions

  1. Cut off stems from galangal and cut root into thin slices.
  2. Prepare lemongrass by slicing off stalk bottoms, removing outer layer, and slicing diagonally into 1-inch (2.5-cm) strips.
  3. Pour 3 cups (700 ml) of coconut milk, galangal, and lemongrass into a medium-size saucepan and place over medium heat.
  4. Slice chicken into medium-size chunks.
  5. Just before coconut milk comes to a boil, add chicken followed by remaining 3 cups (700 ml) of coconut milk.
  6. Before coconut milk boils, reduce heat to medium-low to avoid scalding coconut milk.
  7. Peel stems of Thai chile peppers, slice diagonally, and add to soup.
  8. Stir soup and then add oyster mushrooms. When stirring, move the spoon in one direction only to avoid curdling. 
  9. Reduce heat to low.
  10. Peel and slice onions into thick wedges and add to soup.
  11. Cut tomatoes into thick wedges and add to soup.
  12. Break kaffir lime leaves into pieces in your hand and then add to soup.
  13. Add salt, stirring slowly and gently for 5–10 minutes, making sure it doesn’t come to a full boil. If the soup does boil, reduce the heat.
  14. Turn off heat but do not remove soup from stove.
  15. Chop cilantro and add to soup.
  16. Add lime juice and stir gently.
  17. Serve immediately.