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
Prepare
Peel and chop the tomatoes.
Drain the tomatoes.
Chop the red pepper and onions.
Cook
In a pot, combine the tomatoes, red pepper, onions, sugar, salt, vinegar, and cinnamon.
Simmer the mixture for 2 hours or longer.
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).
-
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
- Form the bulk of the sauce and provide its main liquid and body as they cook down.
- Vinegar
- Adds acidity that brightens the flavour and helps preserve the sauce.
- Sugar
- Balances the acidity of the vinegar and tomatoes with sweetness.
- Onions
- Add savoury depth and aroma that build as they soften during simmering.
The step that matters
Simmer the mixture for 2 hours or longer. A long, gentle simmer lets water evaporate so the sauce thickens and the flavours concentrate. Cooking too briefly leaves it thin and watery. Keep the heat low enough to avoid scorching the sugar and tomatoes on the bottom of the pot.
Swap the onion
How well each one fits the dish's main ingredients (tomato, pepper, sugar, vinegar, cinnamon):
- Capsicumfits better
- Mustardfits better
- Cucumberfits better
- Onionthe original
Fit is the average pairing score against tomato, pepper, sugar, vinegar, 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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