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Chili Sauce

A fermented tomato and pepper sauce with onions, sugar, salt, and vinegar, simmered for hours.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 ingredients
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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

  1. Combine the onions, green peppers, tomatoes, sugar, salt, and vinegar in a large pot.

  2. Bring to a boil and then reduce heat.

  3. Simmer for 2.5 hours, stirring occasionally.

Bottle

  1. Bottle the sauce for later use.

Recipe from a historical cookbook (Internet Archive).

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.

  1. Pepper + tomatotop 7% of all pairs
    Smell alikemoderate
    Cooked together17,923 recipes

    Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).

  2. Onion + tomatotop 8% of all pairs
    Smell alikemoderate
    Cooked together20,633 recipes

    Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).

  3. Onion + peppertop 11% of all pairs
    Smell alikemoderate
    Cooked together68,474 recipes

    Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).

  4. Onion + vinegartop 14% of all pairs
    Smell alikemoderate
    Cooked together18,226 recipes

    Shared aroma: acetic acid (sour, vinegar).

  5. Pepper + vinegartop 14% of all pairs
    Smell alikemoderate
    Cooked 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
Provide bulk and savory sweetness that builds the body of the sauce as they cook down.
Green peppers
Add vegetal flavor and bulk that softens into the sauce during long simmering.
Ripe tomatoes
Supply most of the liquid and body, cooking down into a thick, tangy base.
Sugar
Adds sweetness that balances the acidity of the tomatoes and vinegar.
Vinegar
Provides acidity that brightens the sauce and helps preserve it for storage.

The step that matters

Simmering for 2.5 hours. Long, gentle simmering with occasional stirring lets water evaporate so the sauce thickens, while stirring prevents the sugars and solids from scorching on the bottom of the pot.

Swap the onion

How well each one fits the dish's main ingredients (pepper, tomato, sugar, vinegar):

  1. Capsicumfits better
  2. Cucumberfits better
  3. Mustardfits better
  4. 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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