Sinigang Mix Shrimp Soup: Filipino Sour Broth Made Easy

Sinigang mix shrimp is a Filipino sour soup made with shrimp, vegetables, and a tangy broth flavored with packaged sinigang mix, usually built around tamarind. It is served hot, often with rice, and the mix makes the characteristic sour flavor convenient to adjust. Vegetables and sourness vary by region and household, so this version is a flexible starting point rather than a single fixed formula.

Ingredients

1 lb (450 g) raw shrimp, peeled and deveined; tails may be left on
1 packet sinigang soup mix, about 1.4 oz (40 g); packet sizes and strengths vary, so check the label
8 cups (1.9 L) water
2 medium tomatoes, about 10 oz (300 g), cut into wedges
1 medium yellow onion, about 5 oz (150 g), peeled and cut into wedges
8 oz (225 g) daikon radish, peeled and cut into ½-inch (1 cm) half-moons
1 small Asian eggplant, about 9 oz (250 g), cut into 1-inch (2.5 cm) pieces
6 oz (170 g) green beans, trimmed and cut into 2-inch (5 cm) lengths
4 oz (115 g) kangkong, also called water spinach, cut into 3-inch (7.5 cm) lengths; separate stems and leaves
2 long green chilies, such as finger chilies, left whole or slit once lengthwise
1 tablespoon (15 ml) fish sauce, plus more to taste
½ teaspoon (1 g) ground black pepper
Fine salt, as needed after tasting
4 cups (about 600 g) cooked rice, for serving

Instructions

Prepare the ingredients. If the shrimp are frozen, thaw them in the refrigerator or under cold running water, then drain and pat dry. Keep raw shrimp separate from ready-to-eat ingredients, and wash your hands, knife, and board after handling them. Cut the vegetables as listed, keeping the kangkong stems and leaves apart. The pieces should be similar in size so they cook at a similar pace; daikon can be a little larger because it needs longer to soften.
Start the broth. Pour the water into a large pot and stir in the sinigang mix until it dissolves. Add the tomatoes, onion, green chilies, fish sauce, and black pepper. Bring the liquid to a boil over medium-high heat, then lower the heat to maintain a steady simmer for 6 to 8 minutes. The tomatoes will soften and begin to flavor the broth. Avoid adding salt yet: soup mixes and fish sauce can both be salty, and their strength varies.
Cook the firm vegetables. Add the daikon and simmer for 8 to 10 minutes, until it is beginning to turn tender but still holds its shape. Add the eggplant and green beans and continue simmering for about 5 minutes. Check the daikon with the tip of a knife; it should be easy to pierce without becoming mushy. If it is still firm, give it another couple of minutes before adding the shrimp.
Cook the shrimp and greens. Add the shrimp and kangkong stems. Simmer gently for 3 to 5 minutes, turning the shrimp once if needed, until the largest shrimp is opaque and firm. For the food-safety check, the USDA FSIS safe minimum internal temperature for seafood is 145°F (63°C); check the thickest part of a large shrimp with a food thermometer. Add the kangkong leaves for the final minute, just until wilted. Do not boil the shrimp for a long time, as they can become tough.
Season and serve. Taste the broth once the vegetables and shrimp are cooked. Add fish sauce for more savory depth, a small pinch of salt if needed, or a little more sinigang mix for stronger sourness, following the packet guidance. Let the soup sit off the heat for 2 minutes, then ladle it into bowls with vegetables and shrimp. Serve hot with cooked rice.

Tips

Adjust the mix gradually. Some packets are more sour or salty than others. Start with the amount directed on your packet, taste after the broth simmers, and add more in small increments. If you overshoot the sourness, add a little water and taste again; extra water also dilutes salt, so you may need to restore some savory flavor with fish sauce.
Keep shrimp tender. Add shrimp near the end, not with the raw vegetables. Small shrimp cook quickly, while jumbo shrimp can need the full 5 minutes. Use opacity and the thermometer check rather than relying on color alone, and take the pot off the heat as soon as they are safely cooked.
Use a practical green substitute. Kangkong is sold at some Asian markets, but it may be hard to find. Baby spinach is an easy substitute; stir it in at the end and cook just until wilted. It has softer leaves and a milder, less distinctive flavor than water spinach. Chard also works, but add its chopped stems earlier with the green beans.
Choose vegetables that hold their shape. Cut them into pieces large enough to stay intact during simmering, and avoid stirring the pot vigorously once the eggplant is tender. If you need to work ahead, chop the vegetables and refrigerate them separately, but add the shrimp only when you are ready to cook the soup.

Serving Suggestions

Put a serving of hot rice in each bowl or offer it in a separate bowl so everyone can choose how much to mix into the broth. The rice balances the sharp, salty-sour soup and makes the meal more substantial. For a traditional-style table, serve the soup family-style in a large bowl and provide extra rice alongside it. A small dish of fish sauce with sliced fresh chili is a useful condiment for people who want a saltier or hotter bowl; keep it optional so the soup remains balanced for everyone.

This recipe already includes several vegetables, but a simple side of sliced cucumber or blanched greens can round out a larger meal without competing with the broth. Serve the soup as soon as it is ready: the vegetables look freshest and the shrimp are most tender right after cooking. If the soup is held warm, keep it at a gentle heat rather than letting it boil, since prolonged cooking softens the vegetables and toughens the shrimp.

Variations

Use another souring ingredient. If you do not have sinigang mix, a practical alternative is tamarind concentrate or tamarind paste diluted in water. Begin with a small amount, simmer, and taste before adding more because products differ greatly in intensity and salt content. Plain tamarind gives sourness but usually lacks the seasoning blend in a packet, so season the broth with fish sauce and salt separately. A squeeze of calamansi or lime can brighten a finished bowl, but citrus tastes different and does not replace the deeper tamarind character.

Swap the vegetables. Radish, bok choy, mustard greens, or okra can be used according to availability. Add firm vegetables first and quick-cooking leaves last. Bok choy leaves need only a short wilt, while thicker stems benefit from a few minutes in the simmering broth. Okra adds a slightly silky texture, so add it near the end if you want the pieces to remain distinct.

Change the seafood. Fish pieces or mussels can be used instead of shrimp, but cook each according to its size and texture. For fish, the USDA FSIS safe minimum internal temperature is 145°F (63°C), checked in the thickest part. Avoid simmering delicate fish for longer than necessary. If using frozen seafood, thaw it safely before adding it, and remember that it may release extra liquid and slightly dilute the broth.

Make it more or less spicy. Leave the chilies whole for a gentle pepper aroma, slit them to release more heat, or omit them for a mild pot. For extra heat at the table, offer sliced chili separately. The chili does not replace the sour seasoning; the main flavor should still be tangy, savory broth with the sweetness of tomatoes and vegetables.

Storage and Reheating

For food safety, refrigerate the soup within 2 hours of cooking, dividing a large pot among shallow containers so it cools promptly. Store it covered in the refrigerator for 3 to 4 days. The broth keeps well, but the shrimp and soft vegetables can lose their best texture with each day of storage. If you expect leftovers, you can also store the broth and vegetables separately from cooked rice so the rice does not absorb too much liquid.

Reheat only the portion you plan to eat, either in a saucepan over medium heat or in a microwave-safe bowl, stirring or turning the contents so they warm evenly. Heat leftovers to 165°F (74°C), the USDA FSIS recommended temperature for reheated leftovers. Avoid repeatedly bringing the entire pot to a boil, which can make shrimp rubbery. For longer storage, freeze the cooled soup in airtight containers for about 2 to 3 months for best quality; thaw it in the refrigerator and reheat thoroughly. The vegetables may soften after freezing, and the shrimp texture may be less springy, but the broth will still be useful.

Frequently Asked Questions

Can I use frozen shrimp?

Yes. Thaw frozen shrimp in the refrigerator, or place them in a sealed bag under cold running water until thawed. Drain and pat them dry before adding them to the pot. Do not put a large frozen clump directly into the soup: it cools the broth unevenly and makes it harder to judge when every shrimp has cooked through.

How much sinigang mix should I use?

Start with the amount specified on the packet for roughly 8 cups (1.9 L) of water, then taste and adjust. Packet sizes and salt levels differ, so the 1.4-ounce (40 g) packet in this recipe is a guide rather than a universal measure. If your packet recommends less, follow its directions first and add more only if you want a more pronounced sour broth.

What can I use if I cannot find kangkong?

Baby spinach is the simplest substitute and is widely available. Add it at the end because it wilts quickly; expect a softer texture and milder flavor than water spinach. Bok choy leaves, mustard greens, or chard can also work, though sturdy stems should go into the pot earlier than their leaves.

Can I make the soup ahead?

You can make the broth and cook the firm vegetables ahead, then refrigerate them promptly. For the best shrimp texture, reheat the broth and vegetables until hot, add the raw shrimp, and cook until they reach 145°F (63°C). If the shrimp are already in the soup, leftovers are still fine to store and reheat safely, but they may become firmer.

Why is my broth too sour or salty?

Different mixes vary in both sourness and salt. If the soup is too intense, stir in water a little at a time and taste again; add extra vegetables if you have them. If it is too mild, dissolve a little more mix in a cup of hot broth before returning it to the pot. Avoid adding salt until the final tasting, since the mix and fish sauce may provide enough.

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Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes

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