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Blue Crabs: How to Kill, Clean, and Cook Crabs, with Videos

Updated on September 7, 2014
We like catching our own blue crabs.
We like catching our own blue crabs.

Blue Crab

Blue crabs are abundant in my region, and blue crab is a real delicacy and an important ingredient in Southern food and especially in Lowcountry recipes. My family and I love crabbing, and even the grandkids learned how to catch crabs at an early age. Blue crabs can be easily caught with just a little patience and a little know-how. You can learn how to catch these delicacies by clicking on the link below this article. Give it a try next time you're on the coast! Once you catch your crabs, you'll definitely want to cook them and eat them - blue crab is some of the finest eating you’ll ever do. Before cooking, however, there are some steps you need to take to make sure your crabs are safe to eat. When they are, you might enjoy reading a couple of blue crab recipes.

This was a big blue crab.
This was a big blue crab.

Blue Crabs

Many chefs around the world consider blue crabs to be the most flavorful of all crab species. I agree with this assertion. I’ve eaten Dungeness crabs, snow crabs, and king crab legs, but blue crab meat is my favorite, even though it’s harder to “get to.” That’s mostly due to the fact that blue crabs are smaller than most other edible crabs. Snow crabs and Alaskan king crabs have lots of crab meat in their legs, but this isn’t the case with blue crabs. With them, the crab meat is found in the claws and in the body – not in the legs.

Blue crabs are found mostly on the western side of the Atlantic and in the entire Gulf of Mexico. The species, however, has been accidentally introduced into many other parts of the globe. The size of blue crabs is measured at the carapace – the points that stick out on either side of the shell. Although the blue crab can grow to a carapace width of nine inches, it’s pretty rare to find one this big. When we catch seven-inch crabs, we consider them to be large.

Crab Meat

The crab meat from blue crabs is delicate, and it falls apart easily. This crab meat has a different texture than the meat from other crab species you might have eaten. The flesh isn’t as tough, but it has a slightly sweeter flavor. The meat you get from the body will be flaky. It often separates into individual muscle fibers. If you’re careful retrieving the meat from the claws, you can get larger pieces of crabmeat, which some people prefer in their blue crab recipes.

If you pick crabmeat to be used in other recipes, be sure to go through it first. It’s easy to overlook tiny bits of shell and cartilage. Also, you might want to be careful mixing the ingredients gently so that the lumps aren’t broken up. One more thing: crab meat is mild in flavor, and it doesn’t need a lot of heavy seasonings. Use a light hand until you have some experience with making crab cakes.

The grandkids enjoy catching blue crabs.
The grandkids enjoy catching blue crabs.

Live Blue Crabs

If you’ve visited the eastern coast of the U.S., you might have noticed fishermen on the side of the road selling live blue crabs. The “live” is sometimes highlighted. Have you ever wondered what the big deal is? Blue crabs should be alive when you buy them. If you catch your own, make sure all your crabs are still alive at prep time. Discard any dead crabs – you want to consume only live blue crabs. Well, obviously, you don’t want to eat the critters alive, but you want them to be alive immediately before they’ve been cleaned and cooked. Once the crab dies, the flesh immediately begins to deteriorate. Actually, you might want to keep the dead crabs for fish bait. Cut a crab into sections to catch some large predatory fish species.

Another one of my crab recipes: crab pie.
Another one of my crab recipes: crab pie.

How to Kill Crabs

Before killing the crabs, place them in the sink. Scrub the critters with a brush, especially the backs. Rinse them really well in clean running water. Crabs resist this procedure vehemently - I strongly suggest wearing a pair of heavy gloves while doing this. Before the scrubbing, many crabbers place the crabs in the freezer for a few minutes. This slows them down considerably and de-sensitizes them. Once your crabs are nice and clean, it’s time to kill them – as quickly as possible.

There are basically three different methods used to kill blue crabs before cooking. One is to cut the “head” off, right behind the eyes. Another is to turn the crab on its back and locate the apron. That’s the part that is somewhat triangle-shaped, coming to a sharp point. Halfway between this point and the edge of the shell where the crab’s eyes are, forcefully insert an ice pick.

Another way is to simply cut the crab in half. To do this, place the crab on its back. Place the blade of a sharp chef’s knife or cleaver against the crab’s abdomen, and use a quick mallet blow to the top edge of the blade. This can also be accomplished with a small hatchet.

I’ve experimented with all three methods, and I prefer to cut the crabs in half. I’ve found that this makes the crab easier to clean before cooking and easier to pick after cooking.

The piercing method:

The halving method:

How to Clean Crabs

Learning how to clean crabs properly is important. When the crab is dead, remove the gills – the little rubbery looking things just under the leg flaps that are often called "dead men's fingers." Now, lift the apron and tear it off. Rinse the crab under cool water, making sure to remove all the mustard.

Inside blue crabs is a yellowish substance often referred to as “mustard.” This mustard often contains PCBs – dangerous toxins. If you cook the crabs whole, the PCBs can leach into the water. Even if you remove it before eating, there could still be enough in the juices to be harmful. Besides, I don’t like the idea of boiling something alive!

Steamed blue crabs turn red.
Steamed blue crabs turn red.

Steamed Blue Crabs

Even if you’re going to use the crabmeat in other recipes, you need to start with steamed blue crabs. For steamed blue crabs, you’ll need water that has the same salinity as ocean water. You can approximate this by adding ¾ cup of salt to every gallon of fresh water. Add crab boil or other seasoning to the pot. I like to also add some vinegar and some beer.

Bring the water to a rolling boil, and add the crabs. Depending on the size of the crabs, they’ll be done in six-ten minutes. When cooked, the crabs will turn a bright red.

Blue Crab Recipes

I’ve used numerous blue crab recipes over the years. Of course, lots of folks enjoy simple steamed blue crabs with some melted butter, cocktail sauce, or a seafood seasoning mix like Old Bay. This is a wonderful way to enjoy crab meat, but there are lots of other blue crab recipes you might like to try. Crab cakes would have to be near the top of the list with most folks, and practically ever crabmeat lover has his own ideas about what makes the best crab cakes. Other blue crab recipes I’ve prepared include crab stew, corn and crab chowder, crab soup, crab salad, deviled crab, crab dip, crab spread, crab casserole, crab nachos, and crab soufflé. Blue crab meat can also be used in a stuffing for fish, shrimp, and chicken breasts.

Blue crab recipes like stuffed chicken breasts are great for dinner parties.
Blue crab recipes like stuffed chicken breasts are great for dinner parties.

Crab Claws

The meat from crab claws has a slightly different texture than body meat has. It’s a tad tougher, so the flesh from the crab claws “holds together” much better. Once your blue crabs have been cleaned and cooked, you might want to save the claws for other recipes, like sautéed crab fingers or crab cocktails, breaking the claws off at the first joint. To prepare these blue crab recipes, leave the point of the claw intact and remove the rest of the shell from the crab claws. This piece will function as a handle for the eater to hold as he strips the meat from the rest of the claw with his teeth – at least, that’s the way we eat crab claws down South. When you’re cracking the claws, be careful not to disturb the meat. You want to crack the shell – not obliterate the flesh. It might take a little practice for you to get this right, but after cracking a few crab claws, you’ll get the hang of it.

To make fried crab claws, break the claws off the crabs before cooking. Remove the shell, leaving the longest part of the claw. Whisk one egg and 1/2 cup milk together in a small bowl. In another bowl, combine 1 cup flour, ¼ cup cornstarch, 1 teaspoon salt, ½ teaspoon black pepper, and ½ teaspoon cayenne. Shake or roll the claws in the flour. Holding the crab claws by the claw shell, dip the meaty part into the egg wash, then dredge them in the flour again. Fry crab claws in two or three inches of oil, at around 365-375 degrees. When claws brown, remove from oil and drain on paper towels.

crab cakes
crab cakes

Crab Cakes

I sometimes think I could eat my weight in crab cakes! Crab cakes are pretty easy to make, yet some people are afraid their “crabbie patties” won’t turn out well. I think it’s sort of hard to mess them up, actually. A basic crab cake has just a few ingredients: crabmeat, an egg, a binder, and some type of breading. Of course, most people add other ingredients to make their crab cakes tastier. Below are some ideas for crab cake ingredients.

Ideas for Crab Cakes

dry bread crumbs
Italian bread crumbs
salad dressing
soft white bread
thousand island dressing
horseradish sauce
bell pepper
Ritz crackers
jalapeno peppers
crushed saltines
chili sauce
commercial seafood seasoning
stuffing mix
Worcestershire sauce
whole wheat bread
hot sauce
black pepper
cracker meal
egg substitute
ranch dressing
mustard powder

Add only enough breading to the other ingredients to hold everything together. You want more crab than cake. Once you’ve combined all the ingredients, place the mixture, uncovered, in the fridge until it’s firm. Form into patties. At this point, some cooks like to dust the crab cakes with flour, while others don’t.

Fry the crab cakes in a little butter or oil, at medium heat. When the first side is golden brown, turn the patties over and brown the second side. Serve with cocktail sauce, tartar sauce, mustard sauce, or remoulade.


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    • Cheeky Chick profile image

      Cheeky Chick 7 years ago

      Habee, well done! Your instructions and descriptions are so thorough and clear that anyone could learn how to kill, clean, and cook a blue crab!

      I think I'd leave the killing and the "Mustard" extraction to my hubby, though.



    • habee profile image

      Holle Abee 7 years ago from Georgia

      Thanks, cheeky. It's not hard once you get the hang of it. Thanks for reading and commenting!

    • Zsuzsy Bee profile image

      Zsuzsy Bee 7 years ago from Ontario/Canada

      Might as well teach me the works Habee. When I'm going to get around to catching them I better know how to kill them to.

      Thanks for sharing.

      regards Zsuzsy

    • habee profile image

      Holle Abee 7 years ago from Georgia

      Stay tuned, Zsuzsy - next we're going to pick 'em! Thanks for reading!

    • Hello, hello, profile image

      Hello, hello, 7 years ago from London, UK

      You will go on those killing expedition. Lucky you. It's no good going down to the Thames. Those pictures and your detailed writing makes my mouth water. At least reduce my agony and don't show these lovely pictures.

    • habee profile image

      Holle Abee 7 years ago from Georgia

      Funny, HH. Sorry you can't go crabbing in the Thames! Thanks for commenting.

    • profile image

      ralwus 7 years ago

      Good hub Gigi. As I think I told you, we like our fried whole, soft.

    • habee profile image

      Holle Abee 7 years ago from Georgia

      Hi, Charlie. I like soft shells, hard shells, grilled, fried, steamed, crab cakes, crab stew, crab claws, crab soup...I LOVE crabmeat!! Love you, too, CC! Thanks for visiting!

    • profile image

      ralwus 7 years ago

      OOo, Gigi loves me too. Crab is good. Nevah had it in soup. LOL

    • habee profile image

      Holle Abee 7 years ago from Georgia

      I have a hub about how to make a great crab stew. Always good to see you, Charlie!

    • profile image

      paco 6 years ago

      You don't have to do all of that . Prepare the water and throw them in.

    • habee profile image

      Holle Abee 6 years ago from Georgia

      True, Paco, but I don't like to boil critters alive!

    • jamiesweeney profile image

      jamiesweeney 5 years ago from Philadelphia, PA

      Very useful article, Thanks for the information habee.

    • habee profile image

      Holle Abee 5 years ago from Georgia

      You're welcome, jamie! Are you ready now to pick some crabs and create some great Lowcountry recipes?

    • profile image

      nick 10 months ago

      try crab gravy with spag

    • profile image

      David Nance 9 months ago

      I have lived in the Lowcountry area for two years now. Have done some fishing, love catching redfish. But caught a few blue crab today, didn't keep them because only a couple, but I am trying my hand very soon at crabbing! I do love crab meat, looking forward to seeing how I do. Any tips on places to go around Savannah Georgia area?

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