Why it works: Potato and onion are a kitchen classic. They rank in the top 3% of all ingredient pairs, and cooks put them together in 9,023 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Beef Soup
Ingredients
Directions
Prepare the broth
Add the joint bone of beef to 4 cups of cold water.
Boil slowly and skim often for 3 hours.
Finish the soup
Add ½ cup of rice, 1 chopped potato, 1 chopped onion, and ½ cup of chopped meat.
Boil for an additional 2 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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Potato + oniontop 3% of all pairsSmell alikemoderateCooked together9,023 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Rice + potatotop 7% of all pairsSmell alikestrongCooked together851 recipes
Shared aroma: 2-acetyl-1-pyrroline (popcorn, roasted).
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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 + potatotop 8% of all pairsSmell alikemoderateCooked together2,052 recipes
Shared aroma: sotolon (curry, maple).
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Rice + oniontop 9% of all pairsSmell alikemoderateCooked together10,433 recipes
Shared aroma: 2,4-decadienal (seaweed).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Beef joint bone
- Long simmering draws flavor and body from the bone into the broth.
- Rice
- Releases starch as it cooks, thickening the broth slightly.
- Potato
- Its starch softens and adds body to the broth as it cooks.
- Chopped meat
- Adds savory beef flavor and becomes tender during the long simmer.
- Onion
- Adds aroma and gentle sweetness as it cooks into the broth.
The step that matters
Skimming during the slow boil. Foam and scum rise to the surface during the first hours of simmering. Skimming them off keeps the broth clear and clean-tasting rather than cloudy or greasy.
Swap the onion
How well each one fits the dish's main ingredients (beef, rice, potato, meat):
- Asparagusfits about as well
- Onionthe original
- Tomatofits about as well
- Carrotfits about as well
Fit is the average pairing score against beef, rice, potato, meat. 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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