Why it works: Tomato and onion are a kitchen classic. They rank in the top 8% of all ingredient pairs, and cooks put them together in 20,633 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Tomato Puree
Ingredients
Directions
Make the sauce base
Melt the butter in a frying pan.
Cook the chopped onion in the butter until tender.
Dissolve the sugar and cornstarch in a little of the tomatoes.
Add the dissolved mixture and water to the pan.
Add the cloves.
Cook and strain
Cook for 30 minutes.
Strain the mixture.
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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Tomato + oniontop 8% of all pairsSmell alikemoderateCooked together20,633 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Tomato + clovetop 12% of all pairsSmell alikemoderateCooked together3,474 recipes
Shared aroma: ethyl caproate (fruity, apple peel).
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Onion + clovetop 13% of all pairsSmell alikemoderateCooked together16,901 recipes
Shared aroma: 2-nonanone (fruity, floral).
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Onion + buttertop 15% of all pairsSmell alikemoderateCooked together42,912 recipes
Shared aroma: decanal (soap, orange peel).
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Butter + sugartop 17% of all pairsSmell alikemoderateCooked together98,233 recipes
Shared aroma: guaiacol (smoky, sweet).
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 and flavour of the puree.
- Butter
- Adds fat and richness while softening the onion.
- Cornstarch
- Thickens the liquid as it cooks.
- Sugar
- Adds sweetness that balances the tomato's acidity.
The step that matters
Dissolve the cornstarch fully before adding it to the pan. Cornstarch clumps if added undissolved to hot liquid. Mixing it into a little cool tomato first lets the starch disperse evenly so it thickens smoothly as the mixture cooks.
Swap the clove
How well each one fits the dish's main ingredients (tomato, onion, butter, sugar):
- Garlicfits better
- Cinnamonfits better
- Thymefits better
- Clovethe original
Fit is the average pairing score against tomato, onion, butter, 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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