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
Soak the turtle beans overnight.
In a large pot, combine the soaked beans and soup bone with 6 quarts of water.
Cook and season
Cook for 5 to 6 hours.
When the beans are half done, add the powdered cloves, salt, and pepper.
Strain and serve
Strain the soup through a colander, pressing the bean pulp to achieve desired thickness.
Serve with slices of hard-boiled egg and thinly sliced lemon.
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).
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Clove + peppertop 5% of all pairsSmell alikestrongCooked together17,451 recipes
Shared aroma: ethyl octanoate (fruity, wine).
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Beans + clovetop 9% of all pairsSmell alikestrongCooked together908 recipes
Shared aroma: 2-heptanol (bitter, floral).
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Clove + lemontop 10% of all pairsSmell alikestrongCooked together8,150 recipes
Shared aroma: eucalyptol (eucalyptus, herbal).
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Beans + peppertop 11% of all pairsSmell alikemoderateCooked together4,733 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Turtle beans (black beans)
- Break down during cooking and press through the colander to thicken the soup and give it body.
- Soup bone
- Releases flavour and body into the water during the long simmer, forming the base of the soup.
- Powdered cloves
- Adds warm, aromatic spice flavour to the soup.
The step that matters
Pressing the bean pulp through the colander. Pressing the softened beans pushes their starchy pulp into the liquid, which thickens the soup. Pressing too little leaves it thin, while the beans must be fully softened first so they pass through easily.
Swap the beans
How well each one fits the dish's main ingredients (clove, pepper, egg, lemon):
- Chickpeafits better
- Walnutfits about as well
- Chestnutfits about as well
- Beansthe original
Fit is the average pairing score against clove, pepper, egg, 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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