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Crawfish Soup

A creamy soup made from crawfish, onions, herbs, stock, and bread, finished with cayenne and served hot.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 9 ingredients
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Why it works: Onion and pepper are a kitchen classic. They rank in the top 11% of all ingredient pairs, and cooks put them together in 68,474 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓

Crawfish Soup

Ingredients

Directions

Prepare the crawfish

  1. Clean and wash the crawfish, then place them in a stewpan.

  2. Slice the onions and add them to the crawfish.

  3. Add the bouquet of sweet herbs.

  4. Season with salt and pepper to taste.

  5. Pour the rich stock over the crawfish.

  6. Simmer for ten minutes until the crawfish turn red.

  7. Drain the crawfish, remove the tails, and pick out the meat.

Make the bisque

  1. Pound the shells, claws, and meat in a mortar to a paste.

  2. Soak the slice of bread in the liquor from boiling the crawfish.

  3. Dry the bread before the fire and pound it with the crawfish, adding more liquor as needed.

  4. Strain the mixture through a colander and keep it hot without boiling.

  5. Pour 2 quarts of boiling hot good stock over the mixture.

  6. Add the crawfish tails.

  7. Stir in a pinch of cayenne pepper.

Serve

  1. Place fried bread in a tureen, pour the soup over it, and serve very hot.

Recipe from a historical cookbook (Internet Archive).

Transcribed from a scanned cookbook and modernised for today's kitchens. Where the book gave no heat or time, or said "a moderate oven", the temperatures and times here may be modern equivalents rather than the book's own figures.

Explore the science

The flavor team

The pairs that carry this dish. Each one is judged two ways: how much their aromas overlap, and how often cooks already put them together.

  1. Onion + peppertop 11% of all pairs
    Smell alikemoderate
    Cooked together68,474 recipes

    Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).

  2. Onion + breadtop 15% of all pairs
    Smell alikemoderate
    Cooked together8,676 recipes

    Shared aroma: 2,4-decadienal (seaweed).

  3. Pepper + breadtop 16% of all pairs
    Smell alikemoderate
    Cooked together20,964 recipes

    Shared aroma: 2-nonenal (fatty, green).

Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs

What each ingredient does

Crawfish
Provides the main flavor and the meat that gives the bisque its body.
Bread
Thickens the soup as it is pounded with the crawfish, giving it a smooth body.
Rich stock
Forms the cooking liquid that extracts flavor from the crawfish shells.
Good stock
Adds liquid and savory depth to finish the soup.
Onions
Add aromatic sweetness and savory depth to the cooking liquid.

The step that matters

Simmer for ten minutes until the crawfish turn red. Overcooking toughens crawfish meat and can make the broth bitter, while stopping too early leaves the shells pale and the flavor weak. Watching for the color change helps the shells release their flavor without overcooking the tails.

Swap the onion

How well each one fits the dish's main ingredients (pepper, bread):

  1. Capsicumfits better
  2. Tomatofits better
  3. Spinachfits better
  4. Onionthe original

Fit is the average pairing score against pepper, bread. Candidates are from the same food group and used in at least 100 recipes.

“What each ingredient does” and “The step that matters” were written by Claude from this recipe’s own method and reviewed in samples by CompKitchen.

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