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You are here: Home / All Recipes / Tom Kha Gai (Thai Chicken Soup Cooked with Coconut Cream and Galangal)

Tom Kha Gai (Thai Chicken Soup Cooked with Coconut Cream and Galangal)

I’ve cooked tom kha gai many time before the cooking class in Chiang Mai. But there’s nothing like learning from a Thai chef. That was when I realized that there’s a huge difference between good and great Thai chicken coconut soup.

A serving of tom kha gai

What exactly did I learn in Chiang Mai about cooking tom kha gai?

Probably the most important thing is that adding coconut cream to chicken broth is not enough to make good tom kha gai. You need an arsenal to tips and tricks to make this iconic Thai soup.

Coconut cream, not milk

Adding coconut milk to tom kha gai
  1. If using freshly grated coconut (should be mature, of course), squeeze the coconut without adding water to get pure coconut cream.
  2. If using canned coconut milk, chill unopened in the fridge for a few hours. Open the can and scoop out the thick cream that floats on top. Use that and discard the liquid underneath.
  3. If using powdered, dissolve in the least amount of water to make coconut cream.

Correct herbs and spices

The correct herbs and spices, the seasonings to make a good balance of flavors and the patience to create a good spice base. And when we talk about “correct herbs and spices”, we must understand the nature of each ingredient to know which can withstand substitutions and which you simply have to use or not cook the dish at all.

Let’s start with galangal. It looks a bit like ginger but the flavor is simply not the same. I used to think it was okay to use ginger if I couldn’t find galangal. Fresh galangal is not widely available in the Philippines, I used to make do with crushed galangal in jars and when even the latter was inaccessible, I simply substituted ginger.

Huge mistake especially when cooking Thai dishes like tom kha gai. After all, the name of the dish translates to chicken (gai) cooked (tom) with galangal (kha). Without galangal, the dish would be tom gai, not tom kha gai.

Galangal, palm sugar, shallots, lemongrass, kaffir lime leaves, cilantro and eryngii mushrooms

In the collage above, the dried galangal is on the top left. The other herbs and spices that you simply cannot ditch or insist on finding substitutes for are lemongrass, kaffir lime leaves, chili and cilantro. I wouldn’t even recommend substituting a portion of a large onion for the shallots because large onions are simply too bland.

So, you see, tom kha gai is what it is because it is a combination of so many ingredients that require care in preparation. If you have the ingredients and want to try making the soup, the recipe is below.

Tom Kha Gai (Thai Chicken Soup Cooked with Coconut Cream and Galangal)

Recipe by Connie Veneracion
To make tom kha gai, cook with correct herbs and spices. Galangal is essential. Use fish sauce, not salt. Coconut cream, not milk, will yield the richest soup.
Prep Time 20 mins
Cook Time 20 mins
Total Time 40 mins
Course Soup
Cuisine Thai
Servings 6 people
A serving of tom kha gai
Print Recipe

Ingredients
  

For the spice base

  • 4 slices galangal (rehydrated if using dried)
  • ¼ cup sliced lemongrass (lower portion of the stalk only)
  • 2 pairs kaffir lime leaves ribs removed
  • 2 shallots peeled and roughly chopped
  • 1 bird's eye chili (use more for more heat)
  • 2 tablespoons coriander roots and stems
  • 2 slices ginger
  • 1 teaspoon fish sauce
  • 1 tablespoon coconut sugar dissolved in a teaspoon of water to make a paste

To make the soup

  • 4 cups chicken bone broth
  • 6 chicken thigh fillets cut into thin slices
  • 2 eryngii (King oyster) mushrooms cut into thin slices
  • 1 plump tomatoes diced
  • 8 stalks scallions cut into two-inch lengths
  • 1 whole stalk lemongrass tied into a knot
  • fish sauce
  • 2 cups coconut cream (see notes after the recipe)

To finish the dish

  • ¼ cup lime juice
  • cilantro

Instructions
 

Make the spice base

  • Grind all the solid ingredients in the spice base list. Pour in the fish sauce and diluted coconut sugar slowly to make grinding easier. You don't need to make a paste. You just want to pound everything to small pieces.
    Grinding spice base for tom kha gai

Cook the soup

  • Pour the chicken bone broth into a pot and add the spice base. Bring to the boil.
  • Stir in the chicken, mushrooms, tomato, lemongrass, scallions and a tablespoon of fish sauce.
    Adding spice paste to broth for tom kha gai
  • When the broth starts to boil, lower the heat, cover the pan and simmer for about 10 minutes.
  • Pour in the coconut cream.
    Adding coconut milk to tom kha gai
  • Over medium heat and with the pot uncovered, continue cooking the soup over a gentle boil until the chicken and mushrooms are cooked through.
  • Taste the soup. Add more fish sauce if too bland.
  • Off the heat, stir in the lime juice.
  • Taste and adjust the amount of fish sauce and lime juice, if needed.

Serve the tom kha gai

  • Ladle the soup into bowls. Sprinkle with torn cilantro and serve.
Keyword coconut milk
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