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Mock Turtle Soup

A soup made from a calf's head, vegetables, and seasonings, finished with lemon, egg, and parsley.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 11 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 ↓

Mock Turtle Soup

Ingredients

Directions

Prepare the broth

  1. Clean the calf's head and place it in a large pot.

  2. Add chopped onion, carrot, turnip, and bouquet garni.

  3. Cover with water and simmer for several hours until tender.

  4. Remove the head, strain the broth, and return it to the pot.

Finish the soup

  1. Add vinegar, salt, and pepper to taste.

  2. Chop the meat from the head and add it back to the soup.

  3. Squeeze in the juice of one lemon.

  4. Beat the egg and stir it into the soup just before serving.

  5. Garnish with chopped parsley.

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. Lemon + parsleytop 1% of all pairs
    Smell alikestrong
    Cooked together14,037 recipes

    Shared aroma: beta-phellandrene (minty, terpene).

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

    Shared aroma: coumarin (sweet, hay).

  4. Pepper + parsleytop 2% of all pairs
    Smell alikestrong
    Cooked together34,122 recipes

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

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

    Shared aroma: coumarin (sweet, hay).

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

What each ingredient does

Calf's head
Provides the meat and gelatin that give the soup its body and richness.
Egg
Beaten and stirred in at the end, it adds body and a silky texture to the soup.
Lemon
Its juice adds acidity that brightens the rich broth.
Vinegar
Adds sharpness that balances the richness of the broth.

The step that matters

Stirring in the beaten egg. Add the egg just before serving, stirring it into the hot soup. Adding it too early or letting the soup boil after it goes in can cause the egg to scramble into strands rather than blending smoothly.

Swap the onion

How well each one fits the dish's main ingredients (carrot, turnip, vinegar, pepper, lemon, egg, parsley):

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

Fit is the average pairing score against carrot, turnip, vinegar, pepper, lemon, egg, parsley. 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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