Why it works: Pepper and parsley match in chemistry and in kitchens. They rank in the top 2% of all ingredient pairs, and cooks put them together in 34,122 recipes. Both carry 4'-methylacetophenone, which smells bitter almond. The science ↓
Beef Soup
2 quarts of soupIngredients
Directions
Make the soup
Boil the beef slowly in water for 3 hours to extract the juices.
Add the chopped onion and soaked pearl barley, then boil for an additional hour.
Ensure there are 2 quarts of soup by adding more water as needed.
Season with pepper and coarse sea salt to taste.
Serve
Remove the meat and add parsley or curled cress before serving.
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 + parsleytop 2% of all pairsSmell alikestrongCooked together34,122 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
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Beef + oniontop 7% of all pairsSmell alikemoderateCooked together17,092 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Beef + barleytop 7% of all pairsSmell alikemoderateCooked together458 recipes
Shared aroma: 2-furfurylthiol (coffee, roasted).
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Onion + parsleytop 9% of all pairsSmell alikemoderateCooked together25,843 recipes
Shared aroma: 2,4-decadienal (seaweed).
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Beef + peppertop 10% of all pairsSmell alikemoderateCooked together18,971 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
- Beef
- Provides the main protein and, as it simmers, releases juices that flavour the broth.
- Pearl barley
- Softens as it simmers, thickening the soup and adding a chewy texture.
- Onion
- Adds savoury, aromatic sweetness to the broth as it cooks.
The step that matters
Boil the beef slowly for 3 hours. A slow simmer lets collagen and juices release gradually from the meat. A hard boil toughens the meat and can make the broth cloudy and greasy.
Swap the onion
How well each one fits the dish's main ingredients (beef, barley, pepper, parsley):
- Carrotfits better
- Leekfits better
- Potatofits better
- Onionthe original
Fit is the average pairing score against beef, barley, pepper, parsley. 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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