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Turtle Soup

A rich turtle soup made with veal broth, Madeira, and turtle belly, thickened with flour and butter, finished with egg yolks and cream.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 20 ingredients
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Why it works: Flour and shallot match in chemistry and in kitchens. They rank in the top 6% of all ingredient pairs, and cooks put them together in 2,081 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓

Turtle Soup

Ingredients

Directions

Make the soup base

  1. In a pot, combine veal broth, onion, sweet herbs, and beaten mace. Stew for 1 hour.

  2. Strain the mixture through a sieve.

  3. Thicken with flour and butter.

  4. Add Madeira and stew for another 30 minutes. Season with salt and Cayenne pepper.

Prepare and bake the callipee

  1. Prepare the callipee by filling it with force‑meat. Season with salt, Cayenne pepper, sweet herbs, and chopped shallot. Add a little Madeira.

  2. Seal the edges with paste and bake for 1.5 hours.

Finish the soup

  1. In a stewpan, combine entrails and maw with veal broth, sweet herbs, and beaten mace. Thicken with butter and flour.

  2. Gently stew for 30 minutes. Season with Cayenne pepper and salt.

  3. Beat the yolks of 2 eggs with cream and stir into the mixture until it boils.

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. Flour + shallottop 6% of all pairs
    Smell alikestrong
    Cooked together2,081 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  2. Onion + shallottop 8% of all pairs
    Smell alikestrong
    Cooked together2,431 recipes

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

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

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

  4. Pepper + shallottop 11% of all pairs
    Smell alikemoderate
    Cooked together5,898 recipes

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

  5. Flour + buttertop 12% of all pairs
    Smell alikelow
    Cooked together124,287 recipes

    Shared aroma: isobutyraldehyde (malty, green).

Flour and butter 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

Veal broth
Forms the liquid base that carries the flavour of the soup.
Flour
Thickens the broth into a smooth, body-rich soup as it cooks.
Butter
Adds richness and helps flour thicken the soup smoothly.
Madeira
Adds sweetness and a rounded, aromatic depth to the soup.
Eggs
Egg yolks enriched with cream thicken the soup and add richness.
Cream
Adds fat and smoothness, softening the soup's texture.

The step that matters

Adding the egg and cream mixture. Egg yolks thicken when heated gently, but if the mixture boils hard after the yolks go in, they can scramble and curdle, leaving the soup grainy.

Swap the mace

How well each one fits the dish's main ingredients (veal, onion, flour, butter, pepper, shallot, egg):

  1. Capersfits better
  2. Parsleyfits better
  3. Tarragonfits better
  4. Macethe original

Fit is the average pairing score against veal, onion, flour, butter, pepper, shallot, 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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