How Long To Cook Blue Crabs

ByLily

Blue crabs turn bright red when done, and the cooking time depends on whether they go in whole or cleaned. So how long to cook blue crabs exactly? Most whole blue crabs need 12 to 15 minutes in boiling water, while cleaned crabs cook in about 8 to 10 minutes. The sections below break it down by method, size, and doneness so you get it right every time.

How Long To Cook Blue Crabs: Quick Answer

Here is the short version you can use right now.

  • Whole live crabs, boiling: 12 to 15 minutes
  • Cleaned crabs, boiling: 8 to 10 minutes
  • Steaming whole crabs: 15 to 20 minutes
  • Large jumbo crabs: add 3 to 5 minutes

Timing starts once the water returns to a rolling boil or the steamer is full of steam. Not before.

Why Cooking Time Changes

Three things control how fast a blue crab cooks.

Crab Size

A small 4-inch crab cooks much faster then a 6-inch jumbo. Add a few minutes for every inch of shell width.

Whole Vs Cleaned

A whole crab keeps its shell, lungs, and body intact. Heat has to travel through all that. A cleaned crab is already opened up, so it cooks in less time.

Cooking Method

Boiling transfers heat fast. Steaming is gentler and takes longer. Either works fine, you just adjust the clock.

Boiling Whole Blue Crabs Step By Step

Boiling is the most common way to cook blue crabs at home.

  1. Fill a large pot with enough water to cover the crabs.
  2. Add 1/2 cup of salt per gallon of water. Old Bay works too if you like.
  3. Bring the water to a hard boil.
  4. Lower the crabs in one at a time using tongs. Put them in head first.
  5. Cover the pot and start your timer.
  6. Boil whole crabs for 12 to 15 minutes.
  7. Scoop them out with tongs and serve hot.

Do not crowd the pot. If the crabs are stacked deep, they cook unevenly. Work in batches if you have too many.

Boiling Cleaned Blue Crabs

Cleaned crabs are already gutted and rinsed. They weigh less and heat moves through them quicker.

  • Boil cleaned crabs for 8 to 10 minutes.
  • Small cleaned crabs can be done in 7 minutes.
  • Check one at 8 minutes before pulling the whole batch.

Overcooking cleaned crabs makes the meat rubbery fast. Stay close to the pot.

Steaming Blue Crabs Instead

Many people in Maryland prefer steaming. The meat stays a bit sweeter and less watery.

How Long To Steam Whole Blue Crabs

Steam whole crabs for 15 to 20 minutes with the lid on. Add 5 minutes for jumbos.

Steaming Cleaned Crabs

Cleaned crabs need only 10 to 12 minutes in a steamer.

Layer them loosely. Sprinkle seasoning between layers. Keep the water level below the steamer basket so the crabs steam and do not boil.

How To Tell When Blue Crabs Are Done

You do not need a thermometer for this. Use your eyes and nose.

  • The shell turns bright red or orange. Raw blue crabs are blue-gray.
  • The meat inside is white and firm, not translucent.
  • The claws pull away from the body with a little tug.
  • You smell a cooked, briny crab smell, not a raw one.

If the shell is still patchy blue, give it 2 more minutes and check again.

Common Mistakes To Avoid

Starting The Timer Too Early

The clock starts when the water boils again after you add the crabs. Dropping cold crabs in drops the temp, and that adds minutes.

Overcrowding The Pot

Too many crabs in one pot means the ones in the middle stay undercooked. Use a bigger pot or cook in two rounds.

Cooking Dead Crabs

Only cook crabs that are alive before they hit the pot. A crab that died on its own should be tossed.

Letting Them Sit In Hot Water

Pull the crabs out as soon as the timer ends. Leaving them in the hot water keeps cooking them and dries out the meat.

How Long To Cook Blue Crabs For A Crowd

Feeding a group takes a little planning.

  • Plan 6 to 8 crabs per person for a main meal.
  • Cook in batches of 6 to 8 crabs so the pot stays at a boil.
  • Keep finished crabs warm in a covered cooler or a low oven at 170 degrees.
  • Do not stack hot crabs more then two layers deep or the bottom ones get soggy.

Set out melted butter, lemon, and extra seasoning so people can adjust their own plate.

Storing And Reheating Leftover Crab

Leftover blue crab keeps in the fridge for 3 to 4 days in a sealed container. Pick the meat if you want it to last longer.

To reheat, steam the crab for 3 to 4 minutes. Skip the microwave, it turns the meat tough. Cold crab meat also works great in salads and dips, no reheating needed.

Final Tips For Perfect Blue Crabs

Timing is everything with blue crabs, but it is not hard. Whole crabs boil in 12 to 15 minutes. Cleaned crabs finish in 8 to 10. Steam adds about 5 minutes to either one.

Watch the color, check the meat, and pull them the moment they are done. Do that and your crabs come out tender and full of flavor every single time.

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