Why it works: Pepper and tomato 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
Make the sauce
In a large pot, combine the onions, green peppers, tomatoes, brown sugar, salt, and vinegar.
Bring the mixture to a boil over medium heat.
Reduce heat and simmer for 2.5 hours, stirring occasionally.
Bottle
Once cooked, bottle the sauce for later use.
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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Pepper + tomatotop 7% of all pairsSmell alikemoderateCooked together17,923 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Onion + tomatotop 8% of all pairsSmell alikemoderateCooked together20,633 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Onion + peppertop 11% of all pairsSmell alikemoderateCooked together68,474 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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Pepper + vinegartop 14% of all pairsSmell alikemoderateCooked together27,814 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Onions
- Break down during simmering to give the sauce body and savory sweetness.
- Ripe tomatoes
- Provide the bulk of the liquid and body, cooking down into the sauce's base.
- Vinegar
- Adds acidity that sharpens the flavor and helps preserve the sauce.
- Brown sugar
- Adds sweetness that balances the acidity of the vinegar and tomatoes.
- Green peppers
- Contribute fresh, slightly bitter vegetal flavor and texture as they soften.
The step that matters
Simmering for 2.5 hours. Long, gentle simmering with occasional stirring thickens the sauce and concentrates flavor. Stirring prevents scorching on the bottom of the pot, and the sauce must cook down enough to be safe and stable for bottling.
Swap the onion
How well each one fits the dish's main ingredients (pepper, tomato, sugar, vinegar):
- Capsicumfits better
- Cucumberfits better
- Mustardfits better
- Onionthe original
Fit is the average pairing score against pepper, tomato, sugar, vinegar. 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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