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Chow Chow

A pickled relish made from tomatoes, onions, red peppers, sugar, vinegar, black pepper, salt, and cinnamon.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 8 ingredients
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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 ↓

Chow Chow

Ingredients

Directions

Prepare

  1. Chop the tomatoes, onions, and red peppers.

Cook

  1. In a large pot, combine the chopped vegetables with sugar, black pepper, vinegar, salt, and cinnamon.

  2. Cook over medium heat until the mixture thickens, stirring occasionally.

  3. Add the spices and vinegar when the mixture is almost done cooking.

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. Tomato + peppertop 7% of all pairs
    Smell alikemoderate
    Cooked together17,923 recipes

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

  2. Tomato + oniontop 8% of all pairs
    Smell alikemoderate
    Cooked together20,633 recipes

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

  3. Pepper + cinnamontop 9% of all pairs
    Smell alikestrong
    Cooked together4,890 recipes

    Shared aroma: methyl cinnamate (strawberry).

  4. Sugar + cinnamontop 10% of all pairs
    Smell alikelow
    Cooked together30,779 recipes

    Shared aroma: guaiacol (smoky, sweet).

  5. Tomato + cinnamontop 11% of all pairs
    Smell alikemoderate
    Cooked 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 relish and supply moisture that cooks down into a thick texture.
Onions
Add savory sweetness and body as they soften during cooking.
Vinegar
Adds acidity that sharpens the flavor and balances the sweetness.
Sugar
Adds sweetness that balances the vinegar and helps the relish brown slightly as it cooks.

The step that matters

Cook over medium heat, stirring occasionally, until thickened. Sugar and the natural sugars in tomatoes and onions can scorch on the bottom of the pot. Regular stirring spreads heat evenly and lets water evaporate so the mixture thickens without burning.

Swap the onion

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

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

Fit is the average pairing score against tomato, sugar, pepper, 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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