Why it works: Parsley and carrot match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 8,053 recipes. Both carry 2,4-decadienal, which smells seaweed. The science ↓
Beef Soup
Ingredients
Directions
Make the broth
Crack the bone in 2 or 3 places to release the marrow.
Cover the bone with 3 to 4 quarts of water and boil slowly for 4 hours, skimming regularly.
Let the soup sit overnight.
Finish and serve
Two hours before serving, skim off the fat and carefully pour off the sediment.
Add desired vegetables, season with coarse sea salt, and thicken with flour and butter mixed together.
Strain out the meat and thick vegetable pieces if preferred 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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Parsley + carrottop 1% of all pairsSmell alikestrongCooked together8,053 recipes
Shared aroma: 2,4-decadienal (seaweed).
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Pepper + parsleytop 2% of all pairsSmell alikestrongCooked together34,122 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
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Pepper + carrottop 6% of all pairsSmell alikestrongCooked together14,555 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Tomato + carrottop 6% of all pairsSmell alikestrongCooked together3,606 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Carrot + oniontop 6% of all pairsSmell alikemoderateCooked together21,601 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
- Flour
- Thickens the soup as it cooks with the butter, giving it a fuller body.
- Butter
- Mixed with flour to form a roux-style paste that thickens the broth smoothly and adds richness.
- Bone with meat attached
- Releases marrow and collagen into the water, adding body and savory beef flavor to the broth.
- Vegetables
- Add flavor, sweetness, and texture to the finished soup.
The step that matters
Thickening with flour and butter. Flour added directly to hot liquid clumps and stays grainy. Mixing it with butter first coats the starch granules so they disperse evenly and thicken the soup smoothly.
Swap the tomato
How well each one fits the dish's main ingredients (meat, pepper, parsley, carrot, onion, flour, butter):
- Shallotfits better
- Turnipfits better
- Potatofits better
- Tomatothe original
Fit is the average pairing score against meat, pepper, parsley, carrot, onion, flour, butter. 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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