Why it works: Pepper and tomato are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 17,923 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Tomato Soup
Ingredients
Directions
Make the broth
Place the soup meat in a pot with cold water.
Simmer for several hours to draw out the meat juices.
After the first hour, add onion, salt, and pepper.
Finish the soup
When the meat is tender, add the canned tomatoes and sugar.
Strain the soup.
Allow the soup to cool.
Skim off the fat.
Heat the soup.
Serve.
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.
Photo for illustrative purposes only · Contact us to use it
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 + tomatotop 7% of all pairsSmell alikemoderateCooked together17,923 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Onion + tomatotop 8% of all pairsSmell alikemoderateCooked together20,633 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Onion + peppertop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Meat + oniontop 17% of all pairsSmell alikelowCooked together6,364 recipes
Shared aroma: 2,4-decadienal (seaweed).
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Meat + tomatotop 17% of all pairsSmell alikelowCooked together1,438 recipes
Shared aroma: 1-octen-3-one (mushroom, metallic).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Soup meat with bone
- Releases juices and flavor into the water as it simmers, forming the base of the broth.
- Canned tomatoes
- Provide the main tomato flavor, acidity and body to the soup.
- Onion
- Adds savory aromatic depth to the broth during the long simmer.
- Sugar
- Balances the tomatoes' acidity with a touch of sweetness.
The step that matters
Skim off the fat. Fat from the simmered meat and bones rises and cools into a layer on the surface. Removing it after cooling makes the soup lighter and cleaner-tasting before reheating.
Swap the onion
How well each one fits the dish's main ingredients (meat, pepper, tomato, sugar):
- Capsicumfits better
- Carrotfits better
- Okrafits better
- Onionthe original
Fit is the average pairing score against meat, pepper, tomato, sugar. 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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