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Crayfish Soup or Bisque

A creamy crayfish soup made by boiling crayfish with vegetables, then thickening with butter, flour, cream, and white wine.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 14 ingredients
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Why it works: Carrot and parsley match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 8,053 recipes. Both carry 2,4-decadienal, which smells seaweed. The science ↓

Crayfish Soup or Bisque

Ingredients

Directions

Prepare the stock

  1. Wash the crayfish in cold water and place them head first into boiling water.

  2. Add salt, carrot, turnip, onion, parsley, red pepper, and cloves; boil for 20 minutes.

  3. Remove the crayfish and continue boiling the soup.

  4. Once the crayfish can be handled, break the tails from the bodies and reserve the flesh.

  5. Crush the shells and bodies in a mortar and add them to the soup; boil for 1 hour.

  6. Strain the soup, pressing the vegetables and shells to extract flavor.

Finish the bisque

  1. In a pot, mix butter and flour over heat until smooth, then gradually add the strained soup while stirring to avoid lumps.

  2. Add cream and white wine, then stir in the reserved crayfish tails.

  3. Season with salt and cayenne, and serve immediately.

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. Carrot + parsleytop 1% of all pairs
    Smell alikestrong
    Cooked together8,053 recipes

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

  2. Carrot + turniptop 1% of all pairs
    Smell alikestrong
    Cooked together8,002 recipes

    Shared aroma: coumarin (sweet, hay).

  3. Parsley + peppertop 2% of all pairs
    Smell alikestrong
    Cooked together34,122 recipes

    Shared aroma: 4'-methylacetophenone (bitter almond).

  4. Turnip + parsleytop 2% of all pairs
    Smell alikestrong
    Cooked together2,842 recipes

    Shared aroma: coumarin (sweet, hay).

  5. Pepper + clovetop 5% of all pairs
    Smell alikestrong
    Cooked together17,451 recipes

    Shared aroma: ethyl octanoate (fruity, wine).

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

What each ingredient does

Butter and flour
Cooked together, they form a roux that thickens the soup into a smooth body.
Cream
Adds richness and a smoother, silkier mouthfeel to the finished soup.
White wine
Adds acidity and aromatic depth that brightens the rich shellfish flavor.
Crayfish
Shells and bodies build the stock's flavor, while the tails provide the meat.

The step that matters

Stirring the roux and soup together. Adding the strained soup gradually while stirring keeps the flour dispersed, so the starch hydrates evenly and the bisque stays smooth instead of lumpy.

Swap the onion

How well each one fits the dish's main ingredients (crayfish, carrot, turnip, parsley, pepper, clove, butter):

  1. Parsnipfits better
  2. Leekfits better
  3. Shallotfits better
  4. Onionthe original

Fit is the average pairing score against crayfish, carrot, turnip, parsley, pepper, clove, butter. 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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