Chilli crab is the dish many visitors fly in to eat, but it is surprisingly doable in a home kitchen. This chilli crab recipe walks you through buying crabs at the wet market, cleaning and cutting them safely, and cooking the thick, sweet, gently spicy gravy that everyone fights over with fried or steamed mantou (Chinese buns).
It is a messy, generous, weekend sort of dish. Set aside time, lay newspaper on the table and accept that your stovetop will need a wipe afterwards.
Buying Crabs for Chilli Crab
Most Singapore cooks use mud crabs, sold live at wet markets, some supermarkets and seafood suppliers. Prices change with season and size, so ask the stallholder for the current price per kilo.
What to look for:
- Lively crabs. They should move their legs and claws when touched. Avoid sluggish crabs or any that smell off.
- Heavy for their size. A heavier crab usually has more meat.
- Intact legs and claws. Missing limbs mean less meat and a crab that may be weak.
- Meat crab or roe crab. Stallholders often sell “meat” crabs (more flesh) and female crabs with roe. Either works; ask what is good that day.
Plan on roughly one medium to large crab for every two people as part of a shared meal. Keep the crabs in their ties, cool and lightly covered with a damp cloth, and cook them the same day.
If you would rather avoid handling live crabs, many fishmongers will kill and clean them for you if you ask. Cook these promptly.
Cleaning and Cutting Crabs Safely
Handle crabs carefully, as claws can pinch hard, and keep the string on until the crab is no longer moving.
- Chill first. Many home cooks place live crabs in the freezer for a short period to make them sluggish before preparing them.
- Dispatch quickly. Turn the crab on its back and use a sturdy knife or skewer at the point under the flap to kill it swiftly, as fishmongers do.
- Scrub. Remove the strings and scrub the shell and claws under running water with a stiff brush.
- Remove the carapace. Lift off the top shell. Scrape out and discard the feathery gills and the small mouth parts at the front. Keep any roe or tomalley if you enjoy it.
- Cut. Chop the body in half, then into quarters. Separate the claws and lightly crack them with the back of a cleaver so the gravy can get in.
- Rinse and drain well. Excess water dilutes the gravy.
Ingredients for the Gravy
This makes enough gravy for about two large crabs. Adjust spice and sweetness to taste.
Rempah (spice paste)
– 8 to 10 fresh red chillies, deseeded if you want less heat
– 6 shallots
– 5 cloves garlic
– A thumb-sized piece of ginger
– 1 tablespoon dried shrimp, soaked (optional)
– 1 tablespoon belacan (fermented shrimp paste), toasted (optional)
Sauce
– 4 tablespoons cooking oil
– 3 to 4 tablespoons tomato ketchup
– 3 tablespoons sweet chilli sauce
– 1 to 2 tablespoons sugar
– 1 tablespoon light soy sauce
– About 1 tablespoon tamarind paste mixed into 3 tablespoons water, strained
– 400 to 500ml water or light stock
– 1 tablespoon cornstarch mixed with 3 tablespoons water
– 2 eggs, lightly beaten
– Salt to taste
– Chopped spring onion and coriander to finish
If you like extra heat, keep a spoon of homemade sambal chilli on the side.
Step-by-Step Chilli Crab Method
- Blend the rempah. Blitz the chillies, shallots, garlic, ginger, dried shrimp and belacan with a splash of oil into a fine paste.
- Fry the paste. Heat the oil in a large wok over medium heat. Fry the rempah, stirring often, until it darkens slightly, smells fragrant and the oil starts to separate. This takes patience; raw rempah tastes harsh.
- Build the sauce. Add the ketchup, sweet chilli sauce, sugar, soy sauce and tamarind water. Stir for a minute, then pour in the water or stock and bring to a boil.
- Cook the crab. Add the crab pieces, toss to coat, then cover. Cook over medium-high heat, turning once or twice, until the shells turn fully orange-red and the meat is opaque, usually around 8 to 12 minutes depending on size. Thick claws take longest.
- Thicken. Stir in the cornstarch slurry and simmer until the sauce coats the back of a spoon.
- Add the egg. Turn off the heat or lower it right down. Drizzle the beaten egg into the gravy in a slow stream, stirring gently so it forms soft ribbons rather than scrambled lumps.
- Taste and finish. Adjust with salt, sugar or tamarind. Scatter spring onion and coriander, and serve immediately.
Food safety note: crabs must be cooked through. If the meat near the joints is still translucent, cover and cook for a little longer.
Common Problems and Easy Fixes
| Problem | Likely cause | Fix next time |
|---|---|---|
| Gravy tastes raw or sharp | Rempah not fried long enough | Fry the paste until the oil separates and the smell turns sweet |
| Gravy too watery | Wet crabs or too much stock | Drain crabs well; simmer longer before adding the slurry |
| Egg turned into lumps | Heat too high or egg added too fast | Lower the heat and stream the egg in slowly while stirring |
| Meat sticks to the shell | Overcooked crab | Remove from heat as soon as shells are red and meat is opaque |
| Too sweet or too sour | Ketchup, sugar and tamarind out of balance | Add a little at a time and taste between additions |
Serving Chilli Crab the Singapore Way
- Mantou: deep-fried or steamed buns are the classic way to mop up the gravy. Many supermarkets sell frozen mantou you can fry or steam at home.
- Rice or bread: plain rice or a crusty baguette also work well.
- Tools: crab crackers, picks, finger bowls with lime slices and plenty of tissue.
- Sides: a simple stir-fried green vegetable balances the richness.
Leftover gravy is precious. Toss it with noodles or spoon it over rice the next day, kept refrigerated and reheated until piping hot.
Variations to Try
- Milder for kids: deseed all the chillies and add an extra spoon of ketchup.
- Spicier: keep the seeds, or add a few chilli padi to the rempah.
- Prawn version: use large prawns in their shells, cooking for just a few minutes.
- Black pepper twist: a different dish entirely, but uses the same crab cleaning steps.
Once you have made chilli crab at home, it becomes a dish to bring out for birthdays, reunions and visiting friends. If you enjoy cooking local classics, try our guides to making beef rendang at home and homemade fishballs from scratch.
Frequently Asked Questions
Can I use frozen crab for homemade chilli crab? You can, and it is a handy option when live crab is hard to find. Thaw it fully in the fridge, drain it well and pat dry so the gravy does not turn watery. The meat is usually a little less sweet than fresh, so a touch more seasoning in the sauce can help.
Can I make the chilli crab gravy ahead of time? Yes, the rempah and sauce can be cooked a day ahead and kept refrigerated. Reheat it until bubbling, then add the crab and finish with the cornstarch and egg just before serving. Adding the egg late keeps the ribbons soft instead of scrambled.
How do I store and reheat leftover chilli crab? Cool it quickly, then refrigerate in a covered container and eat it within a day or so. Reheat until piping hot all the way through, not just warm at the edges. The gravy is also good over noodles or rice, as long as it has been properly chilled and reheated.
What can I use if I cannot eat shellfish? Try the same gravy over fried fish, firm tofu or hard-boiled eggs, which soak up the sauce well. Skip the dried shrimp and belacan in the paste, since they are shellfish-based. Anyone with a shellfish allergy should check every ingredient label, including ready-made sauces.
Is homemade chilli crab cheaper than eating it at a restaurant? It can be, especially when feeding a group, since you pay market price for the crab and cook the rest from basic pantry items. Crab prices change with season and size, so ask your stallholder for the current rate. You also save on service charges and extra sides.