Boiled mud crab — the simplest way to cook one of Australia's premier seafoods. The trick to getting maximum meat is in the prep — properly tying the crab BEFORE cooking. Crabs that throw their claws lose half their meat to the boiling water.

15-20 minutes start to finish. Perfect with a cold beer + spring onions sprinkled on top.

Photo by Andrey Stakhovskiy on Unsplash

Serves: 1-2 per crab · Prep: 5 minutes · Cook: 15-20 minutes · Equipment: large stockpot (big enough for the crab + plenty of water), kitchen string, butcher's twine

Photo: Andrey Stakhovskiy / Unsplash

• Live mud crabs (1-2 per person — depending on size)
• Salt water (or fresh water with 2 tbsp salt per litre — to mimic seawater)
• Spring onions, finely sliced — to serve
• Lemon wedges to serve
• Optional dipping sauces: seafood cocktail, garlic + butter, sweet chilli, ginger + soy

Equipment:

• Large stockpot (10L+)
• Kitchen tongs (long-handled)
• Butcher's twine or kitchen string
• Crab crackers or pliers
• Clean tea towel

1. CRITICAL — tie the crab BEFORE cooking, even if it's already dispatched/killed. Tying prevents the crab "throwing" (dropping) its claws during cooking. Thrown claws = meat boils OUT of the shell = your crab arrives at the table half-empty.

How to tie: with the crab on its back (or in a chilled state), bring all 8 legs + 2 claws together over the body. Wrap kitchen twine around the body + tie firmly so legs/claws can't release. The whole crab should be a tight bundle.

2. Bring salt water to boil in your large stockpot. Use 2 tbsp salt per litre to mimic seawater (mud crabs don't like sudden salinity changes).

3. Add the crab. Drop the tied crab into the boiling water. The water will stop boiling temporarily.

4. Bring back to the boil + start the timer when boiling resumes.

5. Cook for:

• Large crab (1.5kg+): 20 minutes
• Medium crab (800g-1.5kg): 15-18 minutes
• Small crab (under 800g): 12-15 minutes

6. Remove from water with long tongs. Allow to cool for 5-10 minutes (still tied — easier to handle).

7. If outside in the bush: place a clean tea towel over the cooling crab to prevent insects.

8. Cut twine + serve. Crack the claws with a crab cracker or pliers. Sprinkle with sliced spring onions. Lemon wedges + your choice of dipping sauce on the side.

• Humane dispatch BEFORE tying — most ethical methods: place in icy water for 30+ minutes (induces unconsciousness), then sever the brain (a quick cut between the eyes) before cooking. RSPCA + animal welfare advice favours this approach
• Buy live OR cook same-day catch — mud crab degrades fast. Don't buy "fresh dead" crabs unless under proper refrigeration
• Female crabs with eggs (orange "berries" under the apron) — illegal to keep in most states. Throw back
• Size limit awareness — most states have minimum size limits (Vic ~15cm carapace; QLD ~15cm; WA varies). Check local regulations
• Chilling before cooking — many chefs prefer to "stress-free" the crab by chilling in fresh water with ice for 30 minutes — produces better-tasting meat
• Dipping sauce options:
  • Garlic butter — melt 100g butter + 3 cloves garlic + parsley
  • Ginger soy — 3 tbsp soy + 1 tbsp grated ginger + 1 tbsp lime juice
  • Sweet chilli — straight from the bottle works fine
  • Cocktail sauce — mayo + tomato sauce + Worcestershire + lemon
• Other cooking methods: chilli mud crab (Singapore-style — see our garlic-ginger crab recipe coming soon), Vietnamese pepper crab, deep-fried, BBQ-grilled half-shell
• Eating technique: body meat first (sweet, delicate), then claws (lots of meat, requires cracking), legs last (small but flavourful)
• Leftover crab meat — pick all the meat from the shell, mix with mayo + lemon for sandwiches the next day

One of the great rewards of fishing northern Australian estuaries — caught yourself, cooked yourself, eaten with your hands. Mud crab is the king of Aussie shellfish.

The tying step is the secret nobody tells you. Half the people who first try cooking mud crab end up with disappointing half-empty shells because they didn't know. Tie it tight + you'll have a properly meaty crab + the satisfaction of doing it right.