How to: Boil Crawfish

The crown jewel of Louisiana’s complex and multi-cultural cuisine can feel daunting to make at home. But it’s easier than you think and tastier than you can imagine. Let’s learn how to boil crawfish at home, including making the very best cajun butter sauce for seafood!

The first time I visited New Orleans, I had already eaten my fair share of crawfish in seafood restaurants across the country. I liked them well enough to keep ordering them, but the flavor was always a bit…meh. Take it or leave it. But since I read and watched so much about the glories of a great crawfish boil, I was sure I was missing something.

And then we had a true cajun crawfish experience in Louisiana, and it all became clear. The clouds parted. Angels sang. It was, indeed, glorious.

I was determined to recreate this magic in my own kitchen. And you can, too!

Now that I live in Portugal, I didn’t think crawfish would be a part of my life, except on visits back to the states. Wrong again! Turns out Portugal has its own native species of crawfish. And then Louisiana crawfish were introduced into Spanish waters in 1973. Six years later, they showed up in Portuguese rivers.

All of the crawfish I’ve seen in fish markets around our village are whole, in the shell, and already blanched and bright red. But since live crawfish have such a short cook-time (about 3-5 minutes) – reheating these blanched crawfish require the same process. So the pictures below show bright red crawfish at the beginning of the process, and if you’re in the US using live or raw crawfish, your starting product will be a darker brown color when you first add them to your large pot of seasoned water at a rolling boil. Once they are cooked, they will float to the top of the pot a bright red color, and that’s how you know they’re cooked.

How much crawfish will I need?

The second major difference you’ll find between Louisiana and Portugal (or most other parts of the world) is the volume of crawfish you can buy at a time. In Louisiana, these live crustaceans are sold as a 30-35 pound sack of crawfish. That many pounds of live crawfish would be enough for you to host your own neighborhood Mardi Gras festival! In Portugal, whole crawfish are sold by the kilo. I bout 3 kilos to feed two people – about 6 1/2 pounds of crawfish. And we had leftovers (keep reading to discover my favorite dish to make with leftover seafood boil ingredients!)

What kind of equipment do I need to boil crawfish?

The recipe below feeds 2-3, and the equipment needed includes a large Dutch oven (or stock pot) for boiling the crawfish, corn and potatoes, a spider or strainer, and a second large pot or container with lid for steaming the hot crawfish in cajun butter sauce, when finished.

For a 30-35 pound sack of crawfish, you need an entirely different set of equipment – an outdoor propane burner, a very large size pot that holds 15-18 gallons of water, a giant strainer basket (or wire basket insert), and a large ice chest or large tub to steam the just-boiled crawfish in a cajun butter sauce.

What is the best seasoning for a crawfish boil?

Old Bay Seasoning, liquid crab boil, ground crawfish boil spices and even your own spice mix are all delicious in a crawfish boil. But I must note that after making seafood boils for years, I heard a Louisiana chef say that seasoning the crawfish boil water didn’t do very much to season the crawfish – that was the job of the cajun butter sauce. Seasoning the water just makes it smell delicious as your guests arrive. Ever since, I’ve cut way back on the crawfish boil seasoning I add to the boiling water. I want the water to be seasoned lightly, but I focus much more on adding flavor and spice to the cajun butter sauce. It’s been a winning philosophy for me!

Let’s get this crawfish party started!

What you’ll need to boil crawfish:

• crawfish
• onions
• garlic
• small red potatoes
• corn on the cob
• salt
• Old Bay Seasoning
• bay leaves
• Cajun butter sauce (for serving)

(ingredient photo includes items for the cajun butter sauce for seafood, including onions, garlic, orange, cayenne, butter and lemon pepper)

Step by step instructions for making this crawfish recipe:

To begin, if using fresh crawfish, wash crawfish very well under running cool water. (Anything called a “mud bug” will require a good cleaning.)

The recipe below is for 2-3 people. So fill a stock pot or dutch oven about 3/4 full of water (for 6 pounds of crawfish I used a very large Dutch oven.)

Add 2 tablespoons coarse sea salt, 2 tablespoons Old Bay Seasoning, 3 quartered onions, 2 bay leaves and a head of garlic cut in half to your pot of water.

Note: After making seafood boils for years, I heard a Louisiana chef say that seasoning the crawfish boil recipe water didn’t do very much to season the crawfish – that was the job of the cajun butter sauce. Seasoning the water just makes it smell delicious as your guests arrive. Ever since, I’ve cut way back on the crawfish boil seasoning I add to the boiling water. I want the water to be seasoned lightly, but I focus much more on adding flavor and spicy seasonings to the cajun butter sauce. And it’s been a winning philosophy for me!

Next bring mixture to a boil over high heat. Then add tiny red potatoes and corn.

Cook 8 minutes (if your potatoes are larger, cut them in half, or plan to boil at this stage for 10-12 minutes and wait to add the corn until the potatoes have boiled about 5 minutes). 

I usually remove the corn and potatoes at this stage to make room for the crawfish. If your pot is big enough to hold both, go ahead and add crawfish.

Then bring the mixture back up to a boil. Cover and cook 3-4 minutes, until the crawfish float to the surface and turn deep red.

Transfer cooked crawfish, new potatoes, corn, onions and garlic to a second stock pot or roaster pan. Then toss in cajun butter sauce.

Next cover and let the crawfish soak in the butter sauce for 5-10 minutes. Then garnish with chives and lemon or orange wedges. Serve with extra sides of cajun butter sauce and spicy aioli.

FAQ’s and Serving Suggestions for this Crawfish Seafood Boil:

To store, store your cajun butter sauce separate from your crawfish boil ingredients and store in the refrigerator for up to 3 days.

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Check out these delicious seafood recipes next:

• Miso Marinaded for Fish
• Easy Shrimp wonton

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