Vietnamese Kabocha Squash Soup with Pork

Vietnamese kabocha squash soup is a home-style canh, or light soup, made with sweet squash, savory ground pork, and scallions in a clear broth. It is simple to serve alongside rice, and the squash softens into tender, creamy pieces while still holding its shape when simmered gently.

Ingredients

1 small kabocha squash, about 2 lb (900 g) whole; seeded and cut into 1-inch (2.5 cm) pieces. Leave the skin on if you like its texture, or peel it for a softer finish.
8 oz (225 g) ground pork
6 cups (1.42 L) water, or low-sodium chicken broth for a fuller-tasting soup
1 medium shallot, about 1 oz (30 g), finely minced
1 tablespoon (15 ml) fish sauce, plus more to taste
¾ teaspoon (4.5 g) fine salt, divided, plus more to taste
½ teaspoon (2 g) granulated sugar
¼ teaspoon (0.5 g) freshly ground black pepper, plus more for serving
2 scallions, about 1 oz (30 g), thinly sliced; keep the green and white parts together or separate them for garnish
¼ cup (10 g) chopped cilantro leaves, optional
1 teaspoon (5 ml) neutral cooking oil, such as canola oil

Instructions

Prepare the squash. Rinse and dry the kabocha. With a sturdy knife, cut it in half, scoop out the seeds and stringy center, then cut the halves into manageable wedges. Remove the peel if desired and cut the flesh into roughly 1-inch (2.5 cm) pieces. Keep the pieces similar in size so they become tender at about the same time. Kabocha can be hard to cut; place it securely on a board and use steady pressure rather than trying to force a slipping knife.
Get the seasonings ready. Mince the shallot and slice the scallions while the squash is being prepared. Measure out the fish sauce, salt, sugar, and pepper. Having these at hand makes it easier to season the broth gradually instead of adding too much salt at once, especially if you choose chicken broth rather than water.
Cook the pork and shallot. Set a medium soup pot over medium heat and add the oil. Add the shallot and cook for about 1 minute, stirring, just until fragrant and translucent; do not let it brown deeply. Add the ground pork, ¼ teaspoon (1.5 g) of the salt, and the black pepper. Break the pork into small crumbles with a spoon and cook for about 4 minutes, stirring frequently. Check a few of the largest crumbles with a food thermometer: USDA FSIS lists 160°F (71°C) as the safe minimum internal temperature for ground meat. Continue cooking briefly if needed.
Build the broth. Pour in the water or broth and stir to loosen any browned bits from the bottom of the pot. Add the fish sauce and sugar. Bring the liquid to a steady boil over medium-high heat, which should take about 3 minutes depending on your stove and pot. Skim away any excess foam if you want a clearer-looking broth; a little pork fat on the surface is normal and adds flavor.
Simmer the squash. Add the kabocha pieces and return the soup to a gentle boil. Lower the heat so the broth simmers rather than bubbles vigorously, cover the pot with the lid slightly ajar, and cook for 16 minutes. Begin checking around 12 minutes: a thin knife should slide into the thickest piece with little resistance, but the squash should not be falling apart. Larger or especially firm pieces may need a few more minutes.
Season and finish. Stir in the remaining ½ teaspoon (3 g) salt and the scallions. Taste the broth, then adjust with a little more fish sauce for savory depth, salt for a more direct seasoning, or a splash of water if the flavor is too concentrated. Simmer for 1 minute, then turn off the heat. Stir in the cilantro if using and let the soup stand for 2 minutes before serving so the flavors settle.
Serve warm. Ladle the broth, pork, and squash into bowls, making sure each serving gets a generous share of both. Add another pinch of black pepper or a few fresh scallion greens at the table. The soup is ready to eat as soon as it is ladled; it does not need a separate resting period.

Tips

Choose a squash that feels heavy. Look for a firm kabocha with an intact, dull green skin and no soft spots. The orange flesh should smell mild and sweet after cutting. If your squash is larger than the one specified, weigh out about 1½ lb (680 g) of prepared pieces for a balanced amount of broth and pork.
Cut evenly, not tiny. Pieces close to 1 inch (2.5 cm) soften without immediately dissolving. Small pieces can disappear into the soup before larger ones are done, while very large chunks take longer and may leave the pork overcooked. If your cuts are mixed, add the larger pieces first and the smaller ones a few minutes later.
Use fish sauce with a light hand. Different fish sauces vary in saltiness, and broth can be salted already. Start with the recipe amount, taste only after the squash is tender, and adjust in small increments. If fish sauce is unavailable, use 1 tablespoon (15 ml) light soy sauce; the soup will taste less traditionally savory and will have a darker broth.
Keep the simmer gentle. A rolling boil can break the squash into the broth and make the soup cloudy. Once the liquid boils, reduce the heat and check the pot occasionally. If the squash is tender before you are ready to eat, turn off the heat rather than continuing to cook it.

Serving Suggestions

Serve this soup hot in individual bowls with steamed jasmine rice and a simple main dish, such as grilled chicken, tofu, or sautéed greens. In a Vietnamese-style meal, a bowl of canh is often part of a spread with rice and other shared dishes, so the soup can be a comforting side rather than the only item on the table. For a lighter meal, serve a larger bowl with rice on the side and let the squash and pork provide the substance.

Set extra fish sauce, sliced scallions, and black pepper on the table so everyone can season their own portion. A plate of cucumber or lightly dressed greens offers a cool, crisp contrast to the soft squash. If serving children or anyone who prefers mild food, keep spicy condiments separate rather than adding them to the pot.

Variations

Use chicken instead of pork. Substitute 8 oz (225 g) ground chicken and cook it in the same way, checking that it reaches 165°F (74°C) with a food thermometer. Ground chicken is leaner, so the finished broth may taste less rich; a little extra scallion or a small amount of chicken broth can round it out.

Make it meatless. Omit the pork and oil, then gently sauté the shallot in the oil and use vegetable broth or water. Add 6 oz (170 g) sliced mushrooms with the squash for a savory note, and replace the fish sauce with 1 tablespoon (15 ml) soy sauce. This changes the traditional pork-based flavor, but gives you a satisfying vegetable soup.

Try another winter squash. Buttercup squash is a close substitute for kabocha and has a similarly dense, sweet texture. Butternut squash also works, though it is usually softer and less starchy, so start checking it after 10 minutes of simmering. Acorn squash can be used too, but its pieces may need a little longer depending on how thickly they are cut.

Add greens near the end. Stir in 2 cups (60 g) of roughly chopped spinach or water spinach during the last 1 to 2 minutes, just until wilted. This adds color and a fresh, leafy element without changing the basic broth. Avoid adding greens too early, since extended simmering can dull their color and texture.

Storage and Reheating

Cool leftovers promptly and refrigerate them within 2 hours of cooking, in a covered container. The soup keeps for 3 to 4 days in the refrigerator. The squash will continue to soften as it sits, so it may be more delicate when reheated; handle it gently if you want the pieces to remain intact.

For longer storage, freeze the cooled soup in airtight, freezer-safe containers for up to 2 months for best quality. Leave a little space at the top because liquid expands as it freezes. Thaw overnight in the refrigerator when possible. Freezing can make the squash softer and slightly grainier, but the broth and pork remain useful for a quick meal.

Reheat only the amount you plan to eat, in a saucepan over medium-low heat, stirring carefully until steaming throughout. If the broth has thickened, add a splash of water. USDA guidance is to reheat leftovers to 165°F (74°C); check the temperature in the center with a food thermometer. Refrigerate any portion you do not serve promptly, and avoid repeatedly cooling and reheating the same pot.

Frequently Asked Questions

Can I eat the kabocha skin?

Yes. Kabocha skin is edible and becomes softer as it cooks, although it can remain firmer than the flesh. Leave it on for less peeling and a little extra texture, or peel it if you want uniformly soft pieces. If leaving it on, scrub the squash well before cutting and remove any damaged areas.

Can I make the soup with water instead of broth?

Yes. Water is a good choice when you want the sweetness of the squash and the flavor of the pork to stand out. Low-sodium chicken broth gives the soup a fuller background flavor, but it can also make the finished dish saltier. Taste before adding extra salt, and remember that fish sauce contributes salt as well as savory flavor.

Why did my squash fall apart?

It was probably cut into small pieces, simmered too vigorously, or cooked longer than needed. Kabocha softens at different rates depending on the squash and the size of the pieces. Check it early with a knife, keep the broth at a gentle simmer, and turn off the heat as soon as the thickest piece is tender.

How can I tell when the pork is safely cooked?

Break the pork into small, separate crumbles as it cooks so it heats evenly, then check the largest pieces with a food thermometer before adding the liquid. Ground pork should reach the USDA FSIS safe minimum internal temperature of 160°F (71°C). Color alone is not a reliable way to confirm a safe temperature.

Can I prepare anything ahead?

You can mince the shallot and slice the scallions up to a day ahead, storing them covered in the refrigerator. You can also seed and cut the squash a day ahead; keep it in an airtight container in the refrigerator and cook it while fresh. For the best texture, cook the soup close to serving time, since squash continues to soften during storage and reheating.

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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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