Why it works: Tomato and pepper 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 ↓
Chili Sauce
Ingredients
Directions
Chop the onions and green pepper.
Combine all ingredients in a large pot.
Cook over medium heat until the mixture thickens.
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 + peppertop 7% of all pairsSmell alikemoderateCooked together17,923 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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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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Pepper + cinnamontop 9% of all pairsSmell alikestrongCooked together4,890 recipes
Shared aroma: methyl cinnamate (strawberry).
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Sugar + cinnamontop 10% of all pairsSmell alikelowCooked together30,779 recipes
Shared aroma: guaiacol (smoky, sweet).
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Tomato + cinnamontop 11% of all pairsSmell alikemoderateCooked together1,348 recipes
Shared aroma: beta-phellandrene (minty, terpene).
Sugar and cinnamon barely smell alike, yet cooks put them together in 30,779 recipes: they work on texture and structure more than aroma.
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, moisture and bulk of the sauce as they break down.
- Sugar
- Adds sweetness and balances the sharpness of the vinegar.
- Vinegar
- Adds acidity that gives the sauce its tang and helps preserve it.
- Onions
- Add savory depth and aroma as they soften into the sauce.
The step that matters
Cooking until the mixture thickens. Tomatoes and onions release water as they cook, so the sauce needs enough time over medium heat for that moisture to evaporate and the pieces to soften. Stopping early leaves it thin and watery.
Swap the onion
How well each one fits the dish's main ingredients (tomato, sugar, vinegar, pepper, cinnamon):
- Capsicumfits better
- Mustardfits better
- Cucumberfits better
- Onionthe original
Fit is the average pairing score against tomato, sugar, vinegar, pepper, cinnamon. 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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