Why it works: Pepper and onion are a kitchen classic. They rank in the top 11% of all ingredient pairs, and cooks put them together in 68,474 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Stock for Clear Soup
Ingredients
Directions
In an iron pot or stewpans, combine veal, butter, bacon, salt, pepper, and onions.
Place on the fire and boil, stirring for about 10 minutes until a whitish thick gravy forms.
Add 5 pints of hot or cold water and bring to a boil.
Reduce heat and let it simmer gently for 45 minutes.
Skim the surface well and strain through a sieve.
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 + oniontop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Butter + oniontop 15% of all pairsSmell alikemoderateCooked together42,912 recipes
Shared aroma: decanal (soap, orange peel).
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Veal + oniontop 17% of all pairsSmell alikelowCooked together6,841 recipes
Shared aroma: 2,4-decadienal (seaweed).
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Veal + peppertop 19% of all pairsSmell alikemoderateCooked together10,049 recipes
Shared aroma: 2-nonenal (fatty, green).
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Butter + peppertop 21% of all pairsSmell alikemoderateCooked together85,593 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Veal knuckle or scrag
- Provides gelatin and meaty flavor that give the stock body and richness.
- Onions
- Add sweetness and aromatic depth as they soften and release their flavor into the stock.
- Bacon
- Adds smoky, savory fat that carries flavor through the stock.
- Butter
- Carries flavor from the aromatics and bacon during the initial cooking.
The step that matters
Skim the surface well. Simmering releases proteins and fat that form a foam and scum on top; removing them keeps the stock clear and prevents a greasy, cloudy result.
Swap the onion
How well each one fits the dish's main ingredients (veal, butter, pepper):
- Capsicumfits better
- Carrotfits about as well
- Potatofits about as well
- Onionthe original
Fit is the average pairing score against veal, butter, 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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