Why it works: Onion and parsley are a kitchen classic. They rank in the top 9% of all ingredient pairs, and cooks put them together in 25,843 recipes. Both carry 2,4-decadienal, which smells seaweed. The science ↓
Rice-macaroni Soup
Ingredients
Directions
Boil rice, onion, broken macaroni, and oil in water for 45 minutes.
Add salt and parsley, and boil for a few more minutes.
Stir in ketchup or peanut butter for flavor, if desired.
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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Onion + parsleytop 9% of all pairsSmell alikemoderateCooked together25,843 recipes
Shared aroma: 2,4-decadienal (seaweed).
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Rice + oniontop 9% of all pairsSmell alikemoderateCooked together10,433 recipes
Shared aroma: 2,4-decadienal (seaweed).
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Rice + parsleytop 10% of all pairsSmell alikestrongCooked together2,762 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
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Onion + ketchuptop 19% of all pairsSmell alikelowCooked together1,997 recipes
Shared aroma: ethanol (alcoholic, ethereal).
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Parsley + ketchuptop 22% of all pairsSmell alikelowCooked together990 recipes
Shared aroma: ethanol (alcoholic, ethereal).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Rice
- Softens as it simmers, thickening the soup and adding body.
- Broken macaroni
- Cooks into the broth, adding starch and a tender, bulky texture.
- Onion
- Softens during simmering, adding savory sweetness to the broth.
Swap the parsley
How well each one fits the dish's main ingredients (rice, onion, ketchup):
- Celeryfits better
- Garlicfits better
- Turmericfits better
- Parsleythe original
Fit is the average pairing score against rice, onion, ketchup. 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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