Lao Fermented Fish Soup with Tamarind and Fresh Herbs

By AislePrompt Test Kitchen · Reviewed by AislePrompt Editorial · ·

A tangy and aromatic Lao soup that highlights fermented fish (pa dek) with tamarind broth and fresh herbs for a deeply savory, sour, and herbal comfort meal. This asian-inspired soups ready in about 45 minutes pairs fermented fish paste (pa dek), water, tamarind paste for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 120 calories and feeds 4, so it slots cleanly into a weekly meal plan and pairs well with a quick salad or grain on the side. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.

Prep: 15 min Cook: 30 min Serves 4 Asian cuisine 120 cal/serving
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Ingredients

Instructions

  1. Step 1: In a large pot, bring 6 cups water to a gentle boil over medium-high heat. Add 2 tbsp fermented fish paste (pa dek), 3 tbsp tamarind paste, 2 sliced lemongrass stalks, 3 thin slices of galangal, and 3 chopped kaffir lime leaves. Simmer gently for 15 minutes until fragrant and sour notes develop.
  2. Step 2: Add 1/2 cup sliced bamboo shoots (if using) and 2 medium thinly sliced shallots to the pot. Continue simmering for another 10 minutes until the bamboo is tender and the broth is rich.
  3. Step 3: Stir in 2 tbsp fish sauce and adjust seasoning as needed. Remove the lemongrass, galangal, and lime leaves with a slotted spoon.
  4. Step 4: Ladle the soup into bowls and garnish with 1/4 cup chopped cilantro, 1/4 cup chopped green onions, and 2 sliced Thai bird chilies for a spicy kick.
  5. Step 5: Serve hot with steamed jasmine rice or sticky rice for a traditional Lao meal experience.

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Frequently asked questions

How long does Lao Fermented Fish Soup with Tamarind and Fresh Herbs take to make?

Total time is about 45 minutes (15 min prep + 30 min cook). Most home cooks find this fits comfortably into a weeknight; double the batch on Sunday for two dinners.

How do I store leftover Lao Fermented Fish Soup with Tamarind and Fresh Herbs?

Cool to room temperature within 2 hours, then store in an airtight container in the fridge for up to 4 days. Reheat covered in a 350°F oven for 10-12 minutes, or microwave at 70% power in 60-second bursts to keep fermented fish paste (pa dek) from drying out.

Can I substitute ingredients in Lao Fermented Fish Soup with Tamarind and Fresh Herbs?

Yes — most ingredients in this recipe have flexible swaps. For oil, use any neutral high-smoke-point oil (avocado, grapeseed, refined coconut). For aromatics, dried herbs at ⅓ the volume of fresh work in a pinch. The full ingredient list is shoppable on Instacart so you can see substitutes in real time.

How do I scale Lao Fermented Fish Soup with Tamarind and Fresh Herbs for a different number of people?

The recipe is written for 4 servings. Multiply each ingredient by (your serving target / 4). Cook time stays roughly the same up to 2x; for 3-4x batches, switch from a skillet to a sheet pan or stockpot so the food isn't crowded — overcrowding steams instead of browns.

What goes well with Lao Fermented Fish Soup with Tamarind and Fresh Herbs?

Asian soups like this pair well with a simple grain (rice, couscous, or crusty bread), a quick salad with acid (lemon vinaigrette, pickled onions), and a pan sauce or yogurt-based dip. Tap "Plan a meal with the AI" to get specific side suggestions.