Why it works: Onion and mustard match in chemistry and in kitchens. They rank in the top 6% of all ingredient pairs, and cooks put them together in 9,259 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Tomato Cream
Ingredients
Directions
Boil the apples, tomatoes, and onions until smooth.
Cover the vegetables with water before boiling.
Strain the mixture through a sieve.
Mix the malt vinegar and mustard thoroughly until free of lumps.
Add brown sugar, Cayenne pepper, and coarse sea salt to taste.
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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Onion + mustardtop 6% of all pairsSmell alikestrongCooked together9,259 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Tomato + peppertop 7% of all pairsSmell alikemoderateCooked together17,923 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Vinegar + mustardtop 7% of all pairsSmell alikemoderateCooked together14,067 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Tomato + oniontop 8% of all pairsSmell alikemoderateCooked together20,633 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Mustard + peppertop 9% of all pairsSmell alikemoderateCooked together15,430 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
- Apples
- Break down into smooth body and natural sweetness for the soup base.
- Tomatoes
- Provide the main flavor and bulk of the soup base.
- Onions
- Add savory depth and aroma to the cooked base.
- Malt vinegar
- Adds acidity that brightens the soup's flavor.
- Mustard
- Adds pungent flavor that complements the acidity and sweetness.
The step that matters
Strain the mixture through a sieve. Cooked apples, tomatoes, and onions must be broken down fully before straining; under-cooked pieces stay coarse and leave the soup grainy rather than smooth.
Swap the apple
How well each one fits the dish's main ingredients (tomato, onion, malt, vinegar, mustard, sugar, pepper):
- Limefits better
- Mangofits better
- Cherryfits better
- Applethe original
Fit is the average pairing score against tomato, onion, malt, vinegar, mustard, sugar, 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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