Samlor Macho (Cambodian Sour Soup with Fish)

About This Recipe

Samlor Macho (សម្លម្ជូរ — literally 'sour soup') is one of the four fundamental soups of Cambodian cuisine, and arguably the most widely eaten dish in the country outside of rice itself. It appears on every Cambodian family table multiple times a week — a clear, golden, sour broth built from tamarind, lemongrass, kaffir lime leaves, and galangal, into which whole fish (the freshwater fish of the Mekong and Tonle Sap lake are traditional), tomatoes, pineapple, bean sprouts, and long beans are placed and briefly simmered. Unlike Thai tom yum — its spicier, more aromatic cousin across the border — samlor macho is defined by balance and restraint: the sourness is gentle (tamarind or slok m'chou leaves), the aromatics subtle (not the Thai-style fragrant punch), and the broth is meant to be restorative and clean rather than bold. Fish is almost always the protein — Cambodia's extraordinary inland fisheries on the Tonle Sap lake have made freshwater fish the cornerstone of Khmer diet for over a millennium. Anthropologists studying the Angkor period (9th–15th centuries) have found abundant fish bones and tamarind in archaeological digs at Angkor Thom, suggesting samlor-style preparations are among the oldest still-living recipes in Southeast Asia. The soup is served over rice or alongside it, and the broth is consumed throughout the meal as a palate refresher and digestive.

Ingredients

Serves 4

• 600 gwhole freshwater fish (tilapia, snakehead, or catfish), cleaned and cut into 5 cm steaks(or use sea bass or barramundi fillets)
• 3 tbsptamarind paste dissolved in 150 ml warm water
• 1.2 literswater or light fish stock
• 3 stalkslemongrass, bruised and tied in a knot
• 3 cmgalangal, sliced
• 4kaffir lime leaves
• 3shallots, halved
• 2 clovesgarlic, smashed
• 2medium tomatoes, quartered
• 150 gfresh pineapple, cut into 2 cm chunks
• 100 glong beans or green beans, cut into 4 cm lengths
• 80 gbean sprouts
• 2 tbspfish sauce
• 1 tspsugar
• 3 stalksspring onions, cut into 3 cm lengths
• small handfulfresh cilantro and Asian celery (chan chi)(for garnish)
• 1fresh red chili, sliced(optional, for serving)

Instructions

1. 1

   Build the aromatic base

   Combine water or stock, bruised lemongrass, galangal slices, kaffir lime leaves, halved shallots, and smashed garlic in a large pot. Bring to a boil and simmer 10 minutes to extract all aromatics.

   This aromatic infusion is the foundation — do not rush it. The longer you simmer the lemongrass and galangal, the more fragrant and complex the broth.

2. 2

   Add tamarind

   Strain the tamarind liquid into the pot (discard pulp). The broth should turn a pale golden-amber color. Taste — it should be gently sour. Add more tamarind if you want a more pronounced sourness, remembering that fish sauce will add salt.

3. 3

   Add tomatoes and pineapple

   Add tomato quarters and pineapple chunks. Simmer 5 minutes until tomatoes have just softened and released their juices into the broth.

4. 4

   Season the broth

   Add fish sauce and sugar. Taste and adjust — the broth should be savory, sour, very slightly sweet, and fragrant. This balance is the heart of samlor macho.

   The Cambodian flavor balance (Khmer: chaeu-phem) aims for a gentler, more restrained sourness than Thai tom yum — if it tastes one-dimensionally sour, add a little more sugar to round it out.

5. 5

   Add fish

   Gently lower fish steaks into the simmering broth. Reduce heat to a gentle simmer. Cook 6–8 minutes until fish is just opaque through and flakes when pressed. Do not stir — fish steaks break easily.

6. 6

   Add vegetables

   Add long beans and bean sprouts. Simmer 2 minutes — the vegetables should retain some crunch and freshness, not be overcooked.

7. 7

   Garnish and serve

   Add spring onions. Ladle into deep bowls, ensuring each bowl gets a piece of fish. Scatter cilantro and Asian celery over the top. Serve with jasmine rice and fresh chili on the side.

Variations

• •

  Samlor macho with shrimp: replace fish with large prawns — cook just 3–4 minutes. The broth remains identical; the protein is lighter.

• •

  Samlor macho khtis (with coconut): add 100ml coconut milk at the end for a richer, slightly creamier Southern Cambodian variant.

• •

  Samlor macho without tamarind: some Cambodian families use slok m'chou leaves (tamarind leaves) or roselle (hibiscus) calyces for sourness — the flavor is slightly more floral.

Storage

Refrigerates up to 2 days — fish continues to absorb the broth and becomes more flavorful. Reheat gently without boiling. Add fresh bean sprouts and herbs when reheating to restore texture.

Frequently Asked Questions