Thai Tom Kha Gai (Coconut Galangal Soup)

  • Yield:4 servings
  • Time:
    24 mins show details

Ingredients

  • 2 tablespoons
    vegetable oil
  • fresh ginger, sliced thin
  • 2
    lemongrass stalks, bruised and cut into 2-inch pieces
  • 2 tablespoons
    red curry paste
  • 4 cups
    chicken broth
  • 2 tablespoons
    fish sauce
  • 1 tablespoon
    light brown sugar
  • coconut milk, full-fat, 13.5 oz
  • 8 ounces
    fresh shiitake mushrooms, stems removed, caps sliced
  • 1 pound
    medium shrimp, peeled and deveined
  • ¼ cup
    fresh lime juice
  • salt, to taste
  • ½ cup
    fresh cilantro, roughly chopped
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Equipment

  • large heavy-bottomed pot

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Preparation

  1. Heat oil in a large heavy-bottomed pot over medium heat. The weight of the pot matters here — you want something that distributes heat evenly for the aromatics.

  2. 1 min

    Add ginger, lemongrass, and curry paste to the heated oil. Cook, stirring constantly, for exactly 1 minute until fragrant. This blooms the spices and awakens all those essential oils. (Don't let the curry paste burn — it turns bitter fast)

  3. Slowly pour in the chicken broth while stirring continuously. This prevents the curry paste from seizing up and ensures a smooth base.

  4. Stir in fish sauce and brown sugar until completely dissolved. The balance of salty, sweet, and umami starts here.

  5. 15 mins

    Bring to a gentle simmer and cook for 15 minutes. You want those aromatics to really infuse the broth — this is where the soul of the soup develops.

  6. Add coconut milk and sliced mushrooms. Stir gently to combine without breaking up the delicate mushroom pieces.

  7. 5 mins

    Simmer until mushrooms are tender, about 5 minutes. They should have given up some of their earthy essence to the broth.

  8. 3 mins

    Add shrimp and cook until they just turn pink and opaque, about 3-5 minutes depending on size. Don't overcook — rubbery shrimp ruins everything.

  9. Remove from heat and stir in fresh lime juice. This brightens the entire soup and balances the richness of the coconut milk.

  10. Taste and adjust with salt as needed. Remember, the fish sauce already adds plenty of salinity.

  11. Ladle into bowls and garnish generously with fresh cilantro. Serve immediately while the aromatics are still singing.

Notes

Remove the lemongrass pieces before serving — they're for flavor, not eating. This soup is best enjoyed fresh, but the base can be made ahead and reheated gently before adding the shrimp.

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