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A bowl of creamy Cajun crab soup topped with large pieces of lump crab meat, sweet corn, green onions, and fresh herbs. The golden-orange broth is speckled with Cajun seasonings and served with slices of crusty French bread on a rustic wooden table.
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Cajun Crab Soup

This Cajun Crab Soup is a creamy, flavor-packed Louisiana-inspired seafood soup made with sweet lump crab meat, Cajun spices, and a rich broth. Loaded with the classic Cajun holy trinity of onion, bell pepper, and celery, this comforting soup is perfect for weeknight dinners, holiday gatherings, or whenever you're craving a restaurant-quality seafood dish at home.
Course Appetizer, Main Course, Soup
Cuisine Cajun, Creole-Inspired, Louisiana, Southern American
Keyword cajun comfort food, cajun crab soup, cajun dinner recipe, cajun seafood soup, cajun soup recipe, crab bisque alternative, crab meat soup, crab soup recipe, crab soup with cream, creamy cajun crab soup, creamy crab soup, creamy seafood soup, easy crab soup, homemade crab soup, louisiana crab soup, louisiana seafood recipes, louisiana soup recipe, lump crab meat soup, restaurant style crab soup, seafood appetizer, seafood comfort food, seafood dinner recipe, seafood soup recipe, southern crab soup, southern seafood recipe
Prep Time 15 minutes
Cook Time 30 minutes
Total Time 45 minutes
Servings 6 servings
Calories 325kcal
Cost $30 for entire recipe

Equipment

  • Large Dutch oven or heavy-bottomed soup pot
  • Wooden spoon or silicone spatula
  • Chef’s knife
  • Cutting board
  • measuring cups
  • Measuring spoons
  • Whisk
  • Ladle
  • Small citrus juicer (optional)
  • Soup bowls for serving

Ingredients

Soup Base

  • 3 tablespoons unsalted butter divided
  • 1 medium yellow onion diced
  • 1 green bell pepper diced
  • 2 celery stalks diced
  • 6 green onions sliced and divided
  • 4 cloves garlic minced
  • 2 tablespoons all-purpose flour
  • 1 teaspoon tomato paste
  • 4 cups seafood stock or 4 cups chicken stock + 8 ounces clam juice

Seasonings

  • 2 teaspoons Cajun seasoning plus more to taste
  • 1 teaspoon smoked paprika
  • ½ teaspoon white pepper
  • ¼ teaspoon garlic powder
  • ¼ teaspoon cayenne pepper optional
  • 1 teaspoon dried thyme
  • 2 teaspoons Worcestershire sauce
  • 1½ teaspoons Louisiana-style hot sauce
  • 1 teaspoon kosher salt plus more to taste
  • 1 bay leaf

Remaining Ingredients

  • ½ cup corn kernels optional
  • ½ cup heavy cream
  • ½ cup half-and-half
  • 1 pound lump crab meat divided
  • 1 tablespoon fresh lemon juice
  • ¼ teaspoon freshly ground black pepper

Garnish

  • Chopped fresh parsley
  • Reserved green onion tops
  • Additional hot sauce
  • Crusty French bread

Instructions

  • Melt 2 tablespoons of butter in a large Dutch oven or soup pot over medium heat.
  • Add the onion, bell pepper, celery, and white portions of the green onions. Cook for 8 minutes, stirring occasionally, until softened.
  • Stir in the garlic and cook for 30 seconds.
  • Sprinkle the flour over the vegetables and cook, stirring constantly, for 3 minutes.
  • Stir in the tomato paste and cook for 1 minute.
  • Gradually whisk in the seafood stock until smooth.
  • Add the bay leaf, Cajun seasoning, smoked paprika, white pepper, garlic powder, cayenne pepper if using, thyme, Worcestershire sauce, hot sauce, corn if using, and kosher salt.
  • Bring the soup to a gentle simmer and cook for 15 minutes.
  • Reduce the heat to low and stir in the heavy cream and half-and-half.
  • Simmer gently for 5 minutes. Do not boil.
  • Remove and discard the bay leaf.
  • Stir in about 40% of the crab meat and warm gently for 2 minutes.
  • Remove from the heat and stir in the lemon juice, black pepper, and remaining 1 tablespoon butter until melted.
  • Taste and adjust the seasoning with additional salt, Cajun seasoning, pepper, or hot sauce as needed.
  • Ladle into bowls and top with the remaining crab meat, parsley, and green onion tops.
  • Serve immediately with crusty French bread and additional hot sauce if desired.

Notes

This Cajun Crab Soup is a rich and comforting Louisiana-inspired seafood soup made with sweet lump crab meat, Cajun seasonings, and a silky cream-based broth. The combination of onion, bell pepper, and celery creates the classic Cajun holy trinity, while seafood stock adds depth and enhances the natural sweetness of the crab.

Choosing the Best Crab Meat

Lump crab meat is highly recommended for this recipe because it provides large, tender pieces of crab throughout the soup. Fresh crab meat delivers the best flavor, but refrigerated pasteurized lump crab meat is an excellent option for convenience.
Be sure to gently pick through the crab meat before adding it to the soup to remove any shell fragments.

Seafood Stock Alternatives

Seafood stock creates the most authentic flavor, but there are several easy substitutes if you do not have it available.
Use 4 cups of chicken stock combined with 1 teaspoon of seafood seasoning for a simple alternative. Another excellent option is 4 cups of chicken stock mixed with 8 ounces of clam juice, which adds a subtle seafood flavor that complements the crab beautifully.

Tips for the Best Flavor

Cook the vegetables until fully softened before adding the flour. This develops a sweeter, richer flavor base and helps create a smooth soup.
Adding the crab meat near the end of cooking keeps the delicate pieces intact and prevents the meat from becoming tough. Stir gently to avoid breaking apart the large lumps.
Fresh lemon juice added at the end brightens the soup and balances the richness of the cream.

Texture and Consistency

This recipe is designed to be silky and lightly creamy rather than thick like a chowder. The small amount of flour helps create body without overwhelming the delicate crab flavor.
If you prefer a richer soup, replace the half-and-half with additional heavy cream. For a thinner consistency, add a splash of seafood stock or chicken stock before serving.

Serving Suggestions

Serve Cajun Crab Soup with crusty French bread, cornbread, oyster crackers, or a fresh green salad. A few extra dashes of hot sauce and a sprinkle of fresh parsley make excellent finishing touches.
This soup works equally well as a cozy weeknight dinner, holiday appetizer, or seafood centerpiece for special occasions.

Storage and Reheating

Store leftover soup in an airtight container in the refrigerator for up to 3 days.
Reheat gently over low heat, stirring occasionally. Avoid boiling the soup after the dairy has been added, as high heat can cause the broth to separate and may affect the texture of the crab meat.