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Mock Turtle Soup

A soup made from a calf's head, simmered for hours, flavored with sweet herb, celery, lemon peel, egg whites, and crushed shells.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 7 ingredients
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Why it works: Celery and lemon match in chemistry and in kitchens. They rank in the top 3% of all ingredient pairs, and cooks put them together in 3,467 recipes. Both carry beta-phellandrene, which smells minty, terpene. The science ↓

Mock Turtle Soup

Ingredients

Directions

Prepare the head

  1. Soak the calf's head in cold water for 2 hours to remove the skin.

  2. Place the head in a large saucepan and cover with cold water.

Simmer the stock

  1. Bring to a boil over moderate heat, then remove the lid and skim off the scum.

  2. Simmer gently for 7 hours until the meat separates from the bone.

Clarify the soup

  1. Strain the soup through a clean towel and let it cool completely.

  2. Remove the grease that rises to the surface.

  3. Reheat the soup on low for 5 minutes, then cool again.

  4. Add the sweet herb, celery, lemon peel, egg whites, and crushed shells.

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. Celery + lemontop 3% of all pairs
    Smell alikestrong
    Cooked together3,467 recipes

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

  2. Lemon + eggtop 19% of all pairs
    Smell alikelow
    Cooked together44,316 recipes

    Shared aroma: (e,e)-2,4-decadienal (fatty, deep fried).

  3. Celery + eggtop 34% of all pairs
    Smell alikelow
    Cooked together6,334 recipes

    Shared aroma: nonanal (fat, citrus).

Lemon and egg barely smell alike, yet cooks put them together in 44,316 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
Connective tissue breaks down into gelatin, giving the soup body and a rich mouthfeel.
Egg whites
As they set, they trap suspended particles so the soup can be clarified to a clear broth.
Celery
Adds a fresh, savoury aroma to the broth.
Lemon peel
Its aromatic oils add a bright citrus note that lifts the rich broth.

The step that matters

Skim off the scum after the boil. Scum is coagulated protein and impurities that rise as the liquid heats. Removing it early keeps the broth clear and clean-tasting, and it is harder to remove once the soup is simmering.

Swap the celery

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

  1. Parsleyfits better
  2. Dillfits better
  3. Tarragonfits better
  4. Celerythe original

Fit is the average pairing score against lemon, egg. 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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