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
Cook the tomatoes in a pot by themselves for a while.
Cook the onions and peppers with a little water in another pot.
Combine the cooked tomatoes, onions, and peppers, and cook until the mixture reduces by half.
Add a stick of cinnamon during cooking, if desired.
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 and liquid that reduces into a thick sauce.
- Onions
- Add savory sweetness and body as they soften during cooking.
- Vinegar
- Adds acidity that balances sweetness and helps preserve the sauce.
- Sugar
- Adds sweetness that balances the acidity of the vinegar and tomatoes.
The step that matters
Reducing the combined mixture. Cooking until the mixture reduces by half concentrates flavor and thickens the sauce. Stopping too early leaves it thin and watery, while overcooking can scorch the sugars on the bottom of the pot.
Swap the cinnamon
The recipe marks cinnamon as optional. How well each one fits the dish's main ingredients (tomato, pepper, onion, vinegar, sugar):
- Garlicfits better
- Tarragonfits better
- Celeryfits better
- Cinnamonthe original
Fit is the average pairing score against tomato, pepper, 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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