Singaporean chili crab is a celebrated Singapore seafood dish of crab simmered in a sweet-hot tomato and chili sauce, usually finished with silky ribbons of egg. This home-friendly version uses uncooked crab pieces so they flavor the sauce as they cook, and serves them with soft mantou buns for scooping; family and regional versions vary in heat, sweetness, and sauce texture.
Ingredients
- 3 lb (1.36 kg) uncooked crab pieces, such as cleaned mud crab, Dungeness crab, or blue crab, with shells and claws
- 2 tablespoons (30 ml) neutral oil, such as canola or sunflower oil
- 4 medium shallots, about 4 oz (115 g), peeled and finely chopped
- 5 garlic cloves, about 1 oz (30 g), peeled and finely chopped
- 1 tablespoon (15 g) finely grated fresh ginger
- 2 red finger-length chilies, about 1 oz (30 g), stemmed and finely chopped; remove seeds for less heat
- 1 tablespoon (15 g) sambal oelek, plus more to taste
- 2 tablespoons (32 g) tomato paste
- 1/2 cup (120 ml) tomato ketchup
- 1 cup (240 ml) low-sodium chicken stock or seafood stock
- 2 tablespoons (30 ml) light soy sauce
- 1 tablespoon (15 ml) rice vinegar
- 1 tablespoon (12 g) granulated sugar
- 1 tablespoon (8 g) cornstarch mixed with 2 tablespoons (30 ml) cold water
- 2 large eggs, about 3.5 oz (100 g) without shells, lightly beaten
- 2 scallions, about 1 oz (30 g), thinly sliced
- 2 tablespoons (8 g) chopped cilantro leaves, optional
- 1/2 teaspoon (3 g) fine salt, or to taste
- 1/4 teaspoon (0.5 g) ground white or black pepper
- 8 to 12 mantou buns, about 1 lb (450 g), for serving
Instructions
- Prepare the crab and aromatics. If using frozen crab, thaw it overnight in the refrigerator and drain it well. Keep it cold while preparing the other ingredients. If the crab is sold whole and uncooked, ask the fishmonger to clean and cut it into sections; otherwise, use a sturdy knife and kitchen shears to separate the body, claws, and legs. Crack the thick claws once with the back of a heavy knife so sauce can reach the meat, without crushing them into fragments. Discard the gills and any inedible internal material. Rinse briefly under cold running water, drain, and pat dry. Wash hands, board, knife, and sink area after handling raw seafood. Chop the shallots, garlic, ginger, and chilies, and mix the cornstarch with cold water just before using.
- Build the chili base. Set a large, wide lidded pot or Dutch oven over medium heat and add the oil. Stir in the shallots and cook for 3 to 4 minutes, until softened but not browned. Add the garlic, ginger, chopped chilies, and sambal oelek. Cook for about 1 minute, stirring constantly, until fragrant. Add the tomato paste and stir for 30 seconds to coat the aromatics. If the mixture begins sticking or the garlic browns, lower the heat and add a spoonful of stock rather than letting it scorch.
- Make the sauce. Pour in the ketchup and stock, then add the soy sauce, rice vinegar, sugar, salt, and pepper. Stir well, scraping the bottom of the pot, and bring the sauce to a gentle simmer. Taste a small spoonful before adding the crab: it should be savory, tangy, and slightly sweet, with a clear chili warmth. Add another teaspoon of sambal if you want more heat, or a splash of stock if it tastes too concentrated. Keep in mind that the crab will release some moisture as it cooks.
- Simmer the crab. Add the crab pieces and turn them in the sauce to coat. Cover the pot and simmer over medium-low heat for 10 to 12 minutes, turning the pieces once halfway through. Keep the liquid bubbling gently rather than boiling hard, which can toughen the meat and splatter sauce. The exact time depends on the size and type of the pieces. Check the thickest crab meat with a food thermometer, positioning the probe in the meat without touching shell; USDA FSIS lists 145°F (63°C) as the safe minimum internal temperature for seafood. The meat should also be opaque and firm, not translucent.
- Thicken and finish with egg. Stir the cornstarch slurry again, then pour in about half while stirring the sauce. Add more a little at a time until the sauce clings to the crab but remains loose enough to dip buns into; you may not need all of it. Reduce the heat to low. Drizzle the beaten eggs slowly around the pot in a thin stream while gently stirring the sauce in one direction. Cook for 30 to 60 seconds, just until delicate egg ribbons form and are set. Avoid vigorous stirring, which breaks them into tiny pieces. Fold in the scallions and cilantro, if using, and taste the sauce for salt, sugar, vinegar, or chili balance.
- Warm the buns and serve. While the crab simmers, steam the mantou according to the package directions, usually for 5 to 8 minutes, or warm them in a covered steamer until soft and hot. Arrange the crab in a large shallow serving bowl and spoon the sauce over it. Serve immediately with the buns and plenty of napkins, small forks or seafood picks, and a bowl for shells.
Tips
Choose crab that suits your market. Mud crab is often associated with Singapore-style chili crab, but Dungeness or blue crab works well in a home pot. If you can only find cleaned crab sections, use them as written. The shell adds flavor and makes the dish more fun to eat, but shell-on pieces require picks and a little patience.
Control the heat in layers. Fresh chilies and sambal both contribute spice, while ketchup and sugar soften it. Start with the listed amount, especially if your sambal is unfamiliar, then adjust the sauce before the crab goes in. For mild heat, remove the chili seeds and use 1 teaspoon of sambal; for a hotter pot, add sambal in small increments near the end.
Keep the sauce gently simmering. A hard boil can make crab meat stringy and can cause the sauce to reduce before the crab is cooked. Use a wide pot so the pieces sit in a mostly even layer, and turn them once rather than stirring roughly. If the pot is too small, cook the crab in two batches and return all the pieces to the sauce to finish.
Use the slurry gradually. Cornstarch thickens quickly once hot, and the crab releases liquid as it cooks. Stir the slurry immediately before adding it and stop when the sauce coats a spoon. If it becomes too thick, loosen it with stock or water a tablespoon at a time.
Serving Suggestions
Bring the crab to the table in its cooking pot or transfer it to a broad, warm platter so the glossy sauce stays easy to reach. Steamed mantou is the classic partner: pull the fluffy buns apart and dip them into the sweet-spicy sauce. If mantou is unavailable, use plain steamed rice, crusty bread, or small soft rolls. Keep sides simple so they do not compete with the crab; cucumber slices, blanched greens, or a crisp salad with a light rice-vinegar dressing are refreshing options.
Set out seafood crackers or picks, extra napkins, and a waste bowl for shells. A spoon is useful for serving the egg-flecked sauce, and small individual bowls make it easier for everyone to dip. For a fuller meal, serve rice alongside the buns rather than replacing them, and offer lime wedges at the table for anyone who likes a brighter finish. The sauce is rich and assertive, so modest portions of side dishes are usually enough.
Variations
Make it less spicy: Use one seeded red chili and omit the sambal, then add a little more only after tasting. The sauce will be milder and more tomato-forward, rather than carrying the usual chili warmth. For a hotter version, add extra sambal or a finely chopped bird’s-eye chili, but do so cautiously because those chilies can be much hotter than long red chilies.
Substitute the fermented chili paste: Sambal oelek is a convenient chili paste, not a requirement for every family’s version. If it is hard to find, use another plain chili paste, or replace it with an additional finely chopped red chili and a pinch of salt. A garlic-heavy chili sauce will make the finished sauce sweeter and more garlicky, so reduce the added garlic slightly if that flavor is already prominent.
Use cooked crab carefully: For fully cooked crab, do not simmer it for the full raw-crab time or the meat may dry out. Make the sauce first, add the cooked crab near the end, and turn it gently until thoroughly hot. Check reheated crab to 165°F (74°C) if it is leftover cooked seafood. The sauce will have less crab flavor because the shells and meat have not simmered in it as long.
Try another shellfish: Large prawns or lobster pieces can be cooked in the same sauce, though their cooking times differ with size. Add prawns only until opaque and firm, and use a thermometer to confirm seafood reaches 145°F (63°C). This changes the dish from crab-centered chili crab, but keeps the sweet, tangy, spicy sauce and egg finish.
Storage and Reheating
For food safety, refrigerate cooked crab within 2 hours of serving, sooner if the room is very warm. Remove the meat from the shells if convenient, then store crab and sauce together in a shallow airtight container. Cooked seafood is best within 3 to 4 days in the refrigerator at 40°F (4°C) or colder. Do not leave the pot at room temperature for an extended period, and do not store it in a sealed jar for pantry keeping.
Reheat only the portion you plan to eat. Put the crab and sauce in a covered saucepan over low to medium-low heat, add a tablespoon or two of water or stock if the sauce has thickened, and turn the pieces gently as they warm. Heat leftovers to 165°F (74°C), checking the meat with a food thermometer; avoid a prolonged boil, which can make crab tough. A microwave also works in a covered microwave-safe dish, using short intervals and turning the pieces between intervals so they heat evenly. The egg ribbons may become less delicate after chilling, but the sauce remains suitable for dipping.
Freezing is possible, though crab meat can lose some tenderness and the sauce may separate slightly after thawing. Freeze promptly in an airtight freezer-safe container, thaw overnight in the refrigerator, and reheat to 165°F (74°C). For the best texture, avoid repeatedly cooling and reheating the same batch. Discard crab that has been left out beyond the safe window or has an unusual odor or appearance.
Frequently Asked Questions
What kind of crab is best for Singaporean chili crab?
Mud crab is a traditional choice, but it may be difficult to find outside Southeast Asian markets. Dungeness and blue crab are practical substitutes; choose uncooked, shell-on pieces when available so the sauce takes on more seafood flavor. Ask a fishmonger to clean and section whole crab if you are not comfortable doing that at home.
Can I make chili crab without live crab?
Yes. Fresh or thawed uncooked crab sections work well and are often easier to handle. Keep them refrigerated until cooking, and do not use raw crab that has been stored improperly. If you use fully cooked crab, add it near the end just long enough to heat through, since a long simmer can dry out the meat.
How do I know when the crab is done?
Check the thickest part of the meat with a food thermometer; seafood should reach 145°F (63°C) under USDA FSIS guidance. The flesh should look opaque and feel firm. Shell color can be a helpful visual clue with some varieties, but it is not a substitute for checking the meat temperature, especially with crab pieces that were already partly cooked or frozen.
Can I prepare the sauce in advance?
Yes. Make the sauce through the simmering step, cool it promptly, and refrigerate it in a covered container for up to 3 days. When ready to eat, bring it to a simmer, add uncooked crab and cook until it reaches 145°F (63°C), then thicken and finish with freshly beaten egg. Keeping the egg until serving gives the sauce its soft, fresh ribbons.
Why is my chili crab sauce too thin or too thick?
Crab releases moisture, and the amount varies, so add the cornstarch slurry gradually rather than pouring it all in at once. If the sauce is thin, simmer it uncovered briefly or add a little more slurry while stirring. If it is too thick, loosen it with stock or water. Let the sauce settle for a minute before making a final adjustment, since it thickens as it cools.
What can I use instead of mantou?
Plain steamed rice is an easy alternative, and crusty bread or soft rolls can also scoop up the sauce. Mantou has a mild flavor and fluffy texture that suit the dish especially well, but there is no need to skip the recipe if it is unavailable. Keep the accompaniment relatively plain so the chili, tomato, and crab remain the main flavors.
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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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