Why it works: Tomato and pepper are a kitchen classic. They rank in the top 7% of all ingredient pairs, and 17,923 recipes mention both. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Tomato Soup
Ingredients
Directions
Cut the chicken and bacon into pieces and put them in a large pot with 1½ gallons of water.
Boil until the chicken and bacon are well cooked.
Add 1 gallon of tomatoes, sugar, onions, salt, and pepper, and continue boiling until everything is tender.
In a separate bowl, mix the flour with butter, thin it with some soup, and stir the mixture back into the pot.
Allow the soup to boil once more, then serve hot.
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 aroma chemistry they share, and how many recipes mention both.
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Tomato + peppertop 7% of all pairsAroma overlapmoderateMentioned together17,923 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Tomato + oniontop 8% of all pairsAroma overlapmoderateMentioned together20,633 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Chicken + tomatotop 8% of all pairsAroma overlapmoderateMentioned together6,031 recipes
Shared aroma: 3-hexenal (apple, fruity).
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Chicken + oniontop 8% of all pairsAroma overlapmoderateMentioned together17,814 recipes
Shared aroma: gamma-nonanolactone (coconut, sweet).
-
Onion + peppertop 11% of all pairsAroma overlapmoderateMentioned together68,474 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
- Tomatoes
- Provide the main body, acidity and flavour of the soup.
- Flour
- Thickens the soup as it mixes with butter and liquid.
- Butter
- Carries the flour so it blends smoothly into the soup without lumps.
- Chicken
- Flavours the broth and adds savoury richness.
- Bacon
- Adds smoky, savoury fat that flavours the broth.
The step that matters
Stirring the flour and butter mixture back into the pot. Flour added directly to hot liquid clumps. Mixing it first with butter and some soup thins it so it disperses evenly and thickens smoothly.
Flavor stand-ins for the onion
How well each one fits the dish's main ingredients (chicken, tomato, sugar, pepper, flour, butter):
- Capsicumbetter flavor fit
- Potatobetter flavor fit
- Okrabetter flavor fit
- Onionthe original
Fit is the average pairing score against chicken, tomato, sugar, pepper, flour, butter. Candidates are from the same food group and used in at least 100 recipes. This compares flavor only: it does not check the job the ingredient does in the dish (bulk, moisture, acidity, structure).
“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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