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 ↓
Sweet Green Tomato Pickles
Ingredients
Directions
Prepare
Slice the green tomatoes and white onions.
Place them in a jar, sprinkling with a generous layer of coarse sea salt.
Put a plate and weight on top.
In the morning, drain off the liquid and rinse the tomatoes well with cold water.
Cook and jar
Add enough vinegar to cover the tomatoes.
Stir in the brown sugar and whole spices.
Cook until tender, but not soft.
Transfer to glass jars and seal.
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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Tomato + oniontop 8% of all pairsSmell alikemoderateCooked together20,633 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Onion + vinegartop 14% of all pairsSmell alikemoderateCooked together18,226 recipes
Shared aroma: acetic acid (sour, vinegar).
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Vinegar + sugartop 15% of all pairsSmell alikemoderateCooked together20,806 recipes
Shared aroma: beta-damascenone (apple, rose).
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Tomato + vinegartop 16% of all pairsSmell alikemoderateCooked together5,063 recipes
Shared aroma: beta-damascenone (apple, rose).
-
Tomato + sugartop 33% of all pairsSmell alikelowCooked together4,667 recipes
Shared aroma: beta-damascenone (apple, rose).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Green tomatoes
- Provide the bulk of the pickle and firm texture when cooked only until tender.
- White onions
- Add savory flavour and soften during cooking, adding body to the pickle.
- Coarse sea salt
- Draws out moisture from the tomatoes and onions, helping them stay firm when cooked.
- Vinegar
- Provides acidity that preserves the pickle and sharpens its flavour against the sweetness.
- Brown sugar
- Adds sweetness and balances the sharpness of the vinegar.
- Whole spices
- Contribute aroma and warm flavour as they infuse into the vinegar and sugar syrup.
The step that matters
Cook until tender, but not soft. Overcooking breaks down the pectin and cell walls, turning the tomatoes mushy. Stopping when they are just tender keeps their shape and texture.
Swap the tomato
How well each one fits the dish's main ingredients (onion, vinegar, sugar):
- Mustardfits better
- Cucumberfits better
- Capsicumfits better
- Tomatothe original
Fit is the average pairing score against onion, vinegar, 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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