This is a Singaporean chilli crab made in a single wok — mud crab pieces simmered in a sauce built from tomato paste, Thai sweet chilli sauce, and fresh bird’s eye chillies, finished with egg ribbons and a squeeze of lime. The whole cook takes about 25 minutes, and the result is a glossy, spicy-sweet sauce worth mopping up to the last drop. If you’ve been putting this dish off because it seemed complicated, this recipe is the honest reason to stop waiting.
The short version of why this works
Two things actually matter here. First, the aromatics — shallots, onion, ginger, garlic, and chilli — go into the oil before anything else, and they need a full minute to soften and release their flavour. Rush that step and the sauce tastes flat no matter what else you do. Second, the egg has to go in last, in a slow stream, with the heat low enough that it forms ribbons rather than scrambled clumps. Pour it in too fast or over too high a heat and you lose the silky texture that makes the sauce coat the crab properly. Everything else in this recipe is forgiving — those two steps are not.
Storage and reheating
Chilli crab is best eaten straight from the wok. That said, leftovers keep in an airtight container in the fridge for up to 2 days — store the crab and sauce together so the meat doesn’t dry out. Reheat gently in a covered pan over low heat with a splash of water or chicken stock to loosen the sauce; it takes about 5 minutes. Don’t microwave it — the egg ribbons turn rubbery and the crab meat toughens fast. Freezing is not recommended; the sauce breaks and the crab texture suffers significantly after thawing.
What can go wrong
- The sauce is watery and won’t coat the crab. The cornstarch slurry settles quickly — if you poured it in without stirring it first, the starch stayed at the bottom of the bowl. Always give it a stir right before it goes into the wok, and keep stirring the sauce for the full 30 seconds after adding it.
- The crab is overcooked and the meat is rubbery. Once the shells turn fully red, the meat is close to done. If your crab pieces are small, check at 6 minutes rather than waiting the full 8. Pull the lid off on time — the residual heat carries it further while you finish the sauce.
- The sauce is too sweet with no real heat. Thai sweet chilli sauce varies a lot by brand — some are much sweeter than others. If your sauce tastes one-dimensional after the crab goes in, add an extra minced bird’s eye chilli and a small pinch of white pepper before the egg step. Skip the garnish — not worth the extra dish.
- The garlic burned during the aromatic stage. Burnt garlic makes the whole sauce bitter and there’s no fixing it once it’s in. Keep the heat at medium, not medium-high, for the first stage, and have the crab pieces ready to go in immediately after the aromatics are fragrant so the pan doesn’t sit empty and overheating.
Singaporean Chilli Crab Recipe (Authentic Hawker Style)
Ingredients
- 1 tablespoon cornstarch cornflour
- 7 tablespoons cooking oil for stir-frying
- 3 small shallots thinly sliced
- 1 oz ginger 2-inch / 5cm; finely grated
- 6 cloves garlic minced
- 4 small red chillies bird’s eye, minced (reduce to 2 for mild heat)
- 2 whole mud crabs live, cleaned and cut into pieces
- 2 cups chicken stock store-bought or homemade
- ¼ cup tomato paste
- ½ cup sweet chilli sauce Thai-style sweet chilli sauce
- 1 large egg beaten
- ½ cup yellow onion finely sliced
- 1 teaspoon lime juice fresh
- ¼ cup cilantro Chinese parsley, chopped
- 8 small mantou buns optional, for serving
- 4 cups cooked jasmine rice optional, to serve
- 3 cups neutral oil for deep-frying mantou buns
- 1 pinch salt or as needed; to taste; for seasoning
- 1 pinch sugar or as needed; to taste; for seasoning
- 1 pinch white pepper or as needed; to taste; for seasoning
Instructions
To make the Singaporean Chilli Crab:
- In a small bowl, stir 1 tablespoon cornstarch with 2 tablespoons (30ml) cold water until smooth to make a slurry. Set aside.
- Scrub the crab pieces thoroughly with a stiff kitchen brush under cold running water to remove any sand and grit. Rinse twice, then pat dry with paper towels. Set aside.
- Heat 7 tablespoons (105ml) oil in a large wok over medium heat until shimmering. Add the shallots and onions and stir-fry for 30 seconds. Add the ginger, garlic, and chillies and stir-fry until fragrant, about 30 seconds more. Do not let the garlic brown.
- Add the crab pieces to the wok and stir to coat in the aromatics. Pour in the chicken stock, then stir in the tomato paste and sweet chilli sauce until evenly combined. Increase heat to medium-high and bring to a boil. Cover loosely and cook at a gentle boil until the crab shells have turned bright red and the meat is nearly cooked through, about 6–8 minutes.
- Remove the lid and season to taste with salt, sugar, and white pepper. Give the cornstarch slurry a quick stir (it settles), then pour it into the sauce while stirring. Cook for 30 seconds until the sauce thickens to a glossy, coating consistency.
- Pour the beaten egg into the sauce in a slow, thin stream. Wait 15–20 seconds, then drag a fork through in long strokes to form silky egg ribbons. Simmer for 30 seconds until the egg is just set. Squeeze the lime juice over the top.
- Transfer the chilli crab and sauce to a large warmed serving dish. Scatter the chopped cilantro over the top and serve immediately with deep-fried mantou buns and steamed rice on the side.
To make deep-fried buns:
- Pour enough oil into a deep heavy-bottomed saucepan to come at least 3 inches (7cm) deep. Heat the oil to 350°F / 180°C using a kitchen thermometer. Carefully lower the steamed mantou buns into the hot oil in batches — do not overcrowd the pan.
- Fry the buns, turning them occasionally with tongs, until evenly golden brown on all sides, approximately 3–4 minutes total.
- Remove the buns from the oil with a slotted spoon and drain on a wire rack or paper towel-lined plate. Serve warm alongside the chilli crab.
Nutrition
FAQ
Can I use frozen crab instead of live mud crab?
Yes, frozen mud crab works, though the meat will be slightly less firm. Thaw it fully in the fridge overnight before cooking, and pat the pieces very dry — excess water from frozen crab dilutes the sauce and makes it harder to get a good glossy consistency.
How spicy is this, and can I tone it down for kids?
With 4 bird’s eye chillies it has a noticeable kick — not punishing, but clearly hot. Drop to 1 chilli or leave them out entirely and the dish is mild enough for most kids; the sweet chilli sauce still gives the sauce its character without the burn.
Can I make this without a wok?
A large, deep skillet works fine. The key is that it needs to be wide enough to fit the crab pieces in a single layer so they cook evenly, and deep enough to hold the sauce without it bubbling over when you bring it to a boil.
If you liked this one
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- Fresh Lemon-Herb Crab Salad
- Quick Homemade Chinese Fried Rice
- Fresh Vegetable Spring Rolls
