Why it works: Kale and chive share more aroma than cooks usually use. They rank in the top 1% of all ingredient pairs, and cooks put them together in 22 recipes. Both carry coumarin, which smells sweet, hay. The science ↓
Spring Soup
Ingredients
Directions
Wash and pick a bunch of spring onions, carrots, lettuces, chervil, spinach, parsley, thyme, sorrel, mint, and asparagus.
In a stewpan, melt a slice of butter and add the vegetables; let them sweat for 1 hour over medium heat, stirring occasionally.
Soak French rolls in water, then squeeze them dry to thicken the soup.
Add mushroom trimmings and fill the pan with good broth; let it nearly boil, then skim the surface.
Pass the mixture through a fine sieve, season with salt and sugar, and garnish with asparagus points or croutons.
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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Kale + chivetop 1% of all pairsSmell alikestrongCooked together22 recipes
Shared aroma: coumarin (sweet, hay).
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Chive + cucumbertop 1% of all pairsSmell alikestrongCooked together244 recipes
Shared aroma: decanal (soap, orange peel).
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Kale + mustardtop 1% of all pairsSmell alikestrongCooked together98 recipes
Shared aroma: coumarin (sweet, hay).
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Mustard + chivetop 1% of all pairsSmell alikestrongCooked together587 recipes
Shared aroma: guaiacol (smoky, sweet).
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Mustard + cucumbertop 3% of all pairsSmell alikestrongCooked together2,281 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
Swap the cucumber
The recipe marks cucumber as optional. How well each one fits the dish's main ingredients (kale, mustard, chive, onion, capsicum, butter, mushroom):
- Shallotfits better
- Lettucefits better
- Okrafits better
- Cucumberthe original
Fit is the average pairing score against kale, mustard, chive, onion, capsicum, butter, mushroom. Candidates are from the same food group and used in at least 100 recipes.
More spring vegetable soup recipes
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