Why it works: Parsley and pepper 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 ↓
Barley Soup
Ingredients
Directions
Combine all ingredients in a large pot.
Simmer gently for 3 hours.
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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Parsley + peppertop 2% of all pairsSmell alikestrongCooked together34,122 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
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Onion + potatotop 3% of all pairsSmell alikemoderateCooked together9,023 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Parsley + potatotop 5% of all pairsSmell alikemoderateCooked together2,855 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
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Barley + potatotop 5% of all pairsSmell alikestrongCooked together165 recipes
Shared aroma: beta-damascenone (apple, rose).
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Beef + oniontop 7% of all pairsSmell alikemoderateCooked together17,092 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
- Pearl barley
- Thickens the broth as its starch softens during long simmering, giving the soup body.
- Shin of beef
- Breaks down slowly over long simmering, releasing gelatin and flavour into the broth.
- Potatoes
- Soften during simmering and release starch, adding body to the soup.
- Onions
- Soften and turn sweet as they cook, adding savoury depth to the broth.
The step that matters
Simmer gently for 3 hours. A gentle simmer keeps the broth clear and lets tough shin of beef become tender. A rolling boil would toughen the meat and cloud the liquid.
Swap the parsley
How well each one fits the dish's main ingredients (beef, barley, onion, potato, pepper):
- Garlicfits about as well
- Thymefits about as well
- Celeryfits about as well
- Parsleythe original
Fit is the average pairing score against beef, barley, onion, potato, pepper. 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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