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Mock Turtle Soup

A soup made with calf's head, hard-boiled eggs, stock, butter, onion, flour, Worcestershire sauce, pepper, salt, and lemon juice.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 10 ingredients
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Why it works: Pepper and lemon match in chemistry and in kitchens. They rank in the top 3% of all ingredient pairs, and cooks put them together in 27,047 recipes. Both carry trans-2-nonenal, which smells cardboard, fatty. The science ↓

Mock Turtle Soup

Ingredients

Directions

Prepare the meat and eggs

  1. Boil the calf’s head until soft.

  2. Cut the meat and tongue into small pieces.

  3. From the yolks of the hard-boiled eggs, form round balls the size of marbles.

  4. Chop the whites of the hard-boiled eggs.

Make the soup

  1. In a pot, fry the chopped onion in butter until soft.

  2. Add flour to the pot and brown it.

  3. Add the soup stock, Worcestershire sauce, pepper, salt, and lemon juice to the pot.

  4. Let the mixture simmer for 10 minutes.

Serve

  1. Pour the soup over the meat and imitation turtle eggs.

  2. Serve hot, adding the chopped egg whites.

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. Pepper + lemontop 3% of all pairs
    Smell alikestrong
    Cooked together27,047 recipes

    Shared aroma: trans-2-nonenal (cardboard, fatty).

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

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

  3. Butter + flourtop 12% of all pairs
    Smell alikelow
    Cooked together124,287 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  4. Butter + saucetop 15% of all pairs
    Smell alikelow
    Cooked together15,338 recipes

    Shared aroma: ethanol (alcoholic, ethereal).

  5. Butter + oniontop 15% of all pairs
    Smell alikemoderate
    Cooked together42,912 recipes

    Shared aroma: decanal (soap, orange peel).

Butter and flour barely smell alike, yet cooks put them together in 124,287 recipes: they work on texture and structure more than aroma.

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, tongue and gelatinous body that give the soup its rich, thick character.
Flour
Browned in butter, it thickens the soup and adds a toasted, nutty flavour.
Butter
Carries the onion's flavour and forms the fat base for browning the flour.
Onion
Softened in butter, it adds sweetness and aromatic depth to the soup base.
Lemon juice
Adds acidity that brightens the rich soup and balances its savoury depth.
Soup stock
Forms the liquid body of the soup, carrying the other flavours throughout.

The step that matters

Browning the flour. Flour cooked in butter must be stirred until it turns golden and smells toasted. If left too pale it can taste raw and starchy, and if burnt it turns bitter and dark.

Swap the onion

How well each one fits the dish's main ingredients (egg, butter, flour, sauce, pepper, lemon):

  1. Shallotfits better
  2. Asparagusfits better
  3. Spinachfits better
  4. Onionthe original

Fit is the average pairing score against egg, butter, flour, sauce, pepper, lemon. 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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