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 ↓
Green Turtle Soup
Ingredients
Directions
Prepare the turtle
Let the turtle hang neck down for 4-5 hours to bleed after cutting off the head.
Separate the two shells with a knife.
Remove the entrails whole.
Clean the turtle meat.
Boil the meat in enough water to cover until the shells of the claws loosen.
Remove the claws.
Place the claws in cold water for 2-3 minutes.
Drain the claws and cut into small pieces.
Make the soup
Add the pieces to the soup stock along with sweet herbs, sliced onion, pepper, and salt.
Cook slowly for about 3 hours.
Strain the soup.
Return the strained soup to the stove.
Thicken the soup with a paste made from browned flour and water.
Simmer the soup for 30 minutes.
Finish and serve
Add the green fat, force-meat balls (or cooked turtle eggs), lemon juice, and sherry or Madeira wine.
Serve the soup hot.
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.
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Pepper + lemontop 3% of all pairsSmell alikestrongCooked together27,047 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
-
Onion + peppertop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Onion + meattop 17% of all pairsSmell alikelowCooked together6,364 recipes
Shared aroma: 2,4-decadienal (seaweed).
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Flour + lemontop 17% of all pairsSmell alikemoderateCooked together30,404 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Lemon + sherrytop 17% of all pairsSmell alikemoderateCooked together3,273 recipes
Shared aroma: 1-octen-3-ol (mushroom, earthy).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Turtle
- Provides the main meat and the rich, gelatinous body of the soup.
- Soup stock
- Forms the liquid base that carries the flavour of the whole soup.
- Browned flour
- Thickens the soup and adds a toasted, nutty depth of colour and flavour.
- Green fat
- Adds richness and a smooth, mouth-coating texture to the finished soup.
- Sherry or madeira wine
- Adds aromatic sweetness and depth to the finished soup.
- Lemon juice
- Adds acidity that brightens the rich soup and balances its flavour.
The step that matters
Thicken with browned flour and water. Stir the paste smoothly into the hot soup and simmer it fully; lumps or undercooked flour leave a pasty taste and grainy texture, while thorough cooking lets the starch swell and thicken evenly.
Swap the onion
How well each one fits the dish's main ingredients (pepper, flour, meat, lemon, sherry):
- Shallotfits better
- Arrowrootfits better
- Capsicumfits better
- Onionthe original
Fit is the average pairing score against pepper, flour, meat, lemon, sherry. 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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