Thai Curry Fish Soup is a bright and flavorful dish that brings together tender fish pieces simmered in a rich, creamy coconut curry broth. You’ll notice the bold spices, fresh herbs like lemongrass and lime leaves, and a hint of heat that gives this soup its signature kick. The broth is silky and fragrant, making every spoonful comforting and exciting at the same time.
I love making this soup when I want something that feels light but still packed with personality. The fish stays juicy and flaky, soaking up the curry flavors without getting dry. One thing I’ve learned is to add a splash of lime juice just before serving—it really lifts all the tastes and gives the soup a fresh finish that makes me smile every time.
Serving this soup with a side of steamed jasmine rice is my favorite way to enjoy it. It’s perfect for sharing on a chilly evening or anytime you need a little warmth and spice in your day. Thai Curry Fish Soup always makes me think of cozy dinners and simple ingredients coming together to make something special at the table.
Key Ingredients & Substitutions
Fish: I prefer firm white fish like cod or snapper because they hold up well in soup. Tilapia works too. If you want, you can swap fish for shrimp or tofu for a different twist.
Red curry paste: This gives the soup its spicy, fragrant base. You can find it in most grocery stores or Asian markets. For less heat, reduce the amount or try a mild curry paste instead.
Coconut milk: It makes the broth creamy and smooth. Use full-fat for richness, or light coconut milk if you want it lighter. Avoid coconut cream—it’s too thick for soup.
Lemongrass, galangal, and kaffir lime leaves: These fresh herbs create that authentic Thai flavor. If you can’t find galangal, ginger is an okay substitute. Dried lime leaves can work but fresh is best.
Fish sauce and lime juice: Fish sauce adds that classic salty depth. Use soy sauce if you’re avoiding fish. Lime juice brightens the soup—don’t skip this step!
How Do I Keep the Fish Tender and Flaky in the Soup?
Fish cooks fast, so add it at the end of simmering to keep it juicy and prevent drying out. Here’s how I do it:
- After simmering the broth and veggies, gently add fish pieces.
- Simmer on low for 5-7 minutes—just until fish turns opaque.
- Avoid stirring too much to keep chunks intact.
- Remove from heat right away to stop cooking.
This way, your fish stays tender and absorbs the curry flavors perfectly!
Equipment You’ll Need
- Medium pot – I use it because it heats evenly and holds enough soup for four servings.
- Wooden spoon – perfect for stirring the curry paste and mixing ingredients without scratching the pot.
- Sharp knife and chopping board – for slicing fish, vegetables, and herbs with ease.
- Measuring spoons and cups – helpful to get the right amounts of curry paste, fish sauce, and lime juice.
- Serving bowls – nice and wide, so you can easily enjoy all the flavors of the soup.
Flavor Variations & Add-Ins
- Swap fish for shrimp or tofu—great for different textures or vegetarian meals.
- Add extra vegetables like baby bok choy or snap peas for more crunch and nutrition.
- Use lime zest along with lime juice for a more intense citrus flavor.
- Spice it up with more sliced Thai red chilies or a dash of Sriracha if you like more heat.
How to Make Thai Curry Fish Soup?
Ingredients You’ll Need:
Main Ingredients:
- 1 lb (450 g) white fish fillets (such as cod, snapper, or tilapia), cut into chunks
- 1 tbsp vegetable oil
- 2 tbsp red curry paste
- 1 can (14 oz/400 ml) coconut milk
- 2 cups fish stock or water
- 1 stalk lemongrass, bruised and cut into pieces
- 3 kaffir lime leaves, torn
- 1-inch piece of galangal or ginger, sliced
- 1 small onion, thinly sliced
- 1 red bell pepper, thinly sliced (optional)
- 1-2 Thai red chilies, sliced (optional for extra heat)
- 1 tbsp fish sauce (adjust to taste)
- 1 tsp brown sugar
- Juice of 1 lime
For Garnishing:
- 3 green onions, chopped
- Fresh cilantro, chopped
- Fried shallots or dried chili flakes (optional)
- Salt to taste
How Much Time Will You Need?
This soup takes about 10 minutes of prep and around 20 minutes of cooking. The total time is about 30 minutes, perfect for a quick yet flavorful meal.
Step-by-Step Instructions:
1. Prepare the Curry Base:
Heat the vegetable oil in a medium pot over medium heat. Add the red curry paste and cook for 1 to 2 minutes, stirring often, until you smell the lovely fragrance coming from it.
2. Add Coconut Milk and Broth:
Pour in the coconut milk and stir well to blend it with the curry paste, creating a smooth, colorful base. Then add the fish stock or water, lemongrass, kaffir lime leaves, sliced galangal (or ginger), and thinly sliced onion. Bring the soup to a gentle simmer.
3. Let the Flavors Develop:
Allow the broth to gently simmer for about 10 minutes. This helps all the herbs and spices release their wonderful flavors into the soup.
4. Cook the Fish and Veggies:
Carefully add the fish chunks to the simmering soup. If you have them, add the sliced red bell pepper and Thai red chilies for a bit of crunch and spice. Let everything cook for 5 to 7 minutes until the fish is cooked through and looks opaque. Be gentle when stirring so the fish doesn’t break apart.
5. Season and Brighten:
Add the fish sauce and brown sugar to balance salty and sweet flavors. Taste and add salt if needed. Remove the pot from heat, then stir in the lime juice which adds a fresh, zesty kick to the soup.
6. Serve and Garnish:
Take out the lemongrass stalk, galangal slices, and lime leaves before serving. Ladle the soup into bowls and sprinkle with chopped green onions, fresh cilantro, and if you like, fried shallots or dried chili flakes on top.
7. Enjoy Your Meal:
Serve your Thai Curry Fish Soup hot with steamed jasmine rice or simply enjoy it as a comforting bowl of fragrant, warming soup. It’s a perfect mix of creamy, spicy, and fresh flavors!
Can I Use Frozen Fish for This Soup?
Yes, you can use frozen fish, but be sure to thaw it completely in the fridge overnight or under cold running water before cooking. Pat it dry to avoid extra moisture in the soup.
How Do I Store Leftovers?
Store any leftovers in an airtight container in the refrigerator for up to 2 days. Reheat gently on the stove over low heat to prevent the fish from overcooking.
Can I Make This Soup Spicier or Milder?
Definitely! Adjust the number of Thai red chilies or the amount of red curry paste to control the heat. For a milder soup, reduce the curry paste or skip the chilies altogether.
What Can I Substitute for Lemongrass or Kaffir Lime Leaves?
If you can’t find fresh lemongrass or kaffir lime leaves, use a teaspoon of lemon zest or lime zest and a splash of lemon juice to mimic the citrusy aroma. Fresh ginger works okay if you don’t have galangal.