Tom Kha is one of those soups where the aromatics do all the work - lemongrass, galangal or ginger, kaffir lime leaves, and mushrooms in a coconut milk broth that is simultaneously light and deeply satisfying. Extra virgin coconut oil used to sauté the base carries the lemongrass oils into the broth in a way that simply adding the coconut milk directly cannot. The result is a soup that smells like it came from a proper Thai restaurant and costs almost nothing to make. Cold-pressed coconut oil is the only fat that makes sense here - refined coconut oil loses the delicate aromatic compounds that carry the lemongrass flavour. For a simpler coconut oil preparation that showcases the same clean fat in a snack format, the Coconut Oil Popcorn is the easiest demonstration.
Ingredients
- 1 tbsp Earthen Story Extra Virgin Coconut Oil Shop ↗
- 400 ml full-fat coconut milk (1 can)
- 200 ml vegetable or chicken stock
- 150 g mushrooms (oyster, button, or shiitake), sliced
- 2 stalks lemongrass, bruised and cut into segments
- 1-inch piece galangal or fresh ginger, sliced
- 4 kaffir lime leaves, torn (or 1 tsp lime zest)
- 2 tbsp fish sauce or soy sauce
- 1 tbsp lime juice
- 1 red chilli, sliced
- Fresh coriander - for garnish
Steps
- Heat coconut oil in a medium saucepan over medium heat. Add lemongrass, galangal or ginger, and chilli. Sauté for 2 minutes until fragrant - the oil will pick up the aromatic oils from the lemongrass.
- Add mushrooms and cook for 3 minutes until they begin to soften and colour slightly.
- Pour in coconut milk and stock. Add kaffir lime leaves and bring to a gentle simmer - do not boil vigorously, as this can make the coconut milk separate.
- Simmer on low for 10 minutes for the flavours to develop. The lemongrass and galangal are not meant to be eaten - they are flavouring agents.
- Season with fish sauce (or soy sauce for vegetarian), lime juice, and taste. The soup should be balanced between creamy, sour, salty, and spicy.
- Serve in bowls, garnished with fresh coriander and a final squeeze of lime. The lemongrass stalks can be removed or left for presentation - warn guests not to eat them.
Key Benefits
- Coconut oil for aromatic extraction and stable cooking fat Sautéing lemongrass and ginger in cold-pressed virgin coconut oil before adding liquids extracts the fat-soluble aromatic compounds in a way water-based cooking cannot. Knowing which oil to use for which cooking technique is one of the most impactful kitchen upgrades available - coconut oil at medium heat for aromatic extraction is exactly right.
- Coconut milk for anti-inflammatory medium-chain fats The lauric acid in coconut milk has documented antimicrobial and anti-inflammatory properties. A bowl of tom kha is genuinely immune-supportive, which is why it has been used across Southeast Asia as a comfort food during illness for centuries. Choosing coconut products from traceable, pesticide-free sources matters - coconut palms are heavily sprayed in some regions.
- Mushrooms for beta-glucans and umami depth Mushrooms provide beta-glucan polysaccharides with immune-modulating properties, alongside the glutamate that gives this soup its characteristic depth without any MSG or flavour enhancers. The coconut oil base ensures the fat-soluble compounds in the mushrooms and aromatics are fully absorbed - a refined oil would not achieve the same result.
Explore more recipes like this on our Recipes page, or read our ingredient guides and food knowledge articles in the Discover section.
