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Sauce

Cold Catsup

A tomato-based sauce with horseradish, mustard seeds, spices, sugar, and vinegar, chilled and stored in a jar.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 12 ingredients
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Why it works: Horseradish and mustard match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 1,832 recipes. Both carry coumarin, which smells sweet, hay. The science ↓

Cold Catsup

Ingredients

Directions

Prepare

  1. Peel and finely chop the tomatoes.

Mix and store

  1. In a large bowl, combine the tomatoes, horseradish, salt, mustard seeds, black pepper, red peppers, celery, onions, cinnamon, cloves, sugar, and vinegar, then stir well to combine all ingredients.

  2. Transfer the mixture to a glass can or jar for storage.

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. Horseradish + mustardtop 1% of all pairs
    Smell alikestrong
    Cooked together1,832 recipes

    Shared aroma: coumarin (sweet, hay).

  2. Cinnamon + clovetop 1% of all pairs
    Smell alikestrong
    Cooked together14,189 recipes

    Shared aroma: ethyl cinnamate (sweet, balsamic).

  3. Mustard + celerytop 2% of all pairs
    Smell alikemoderate
    Cooked together4,169 recipes

    Shared aroma: guaiacol (smoky, sweet).

  4. Tomato + celerytop 4% of all pairs
    Smell alikemoderate
    Cooked together3,377 recipes

    Shared aroma: 4'-methylacetophenone (bitter almond).

  5. Pepper + clovetop 5% of all pairs
    Smell alikestrong
    Cooked together17,451 recipes

    Shared aroma: ethyl octanoate (fruity, wine).

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 body and flavour.
Vinegar
Adds acidity that sharpens flavour and helps preserve the sauce.
Sugar
Adds sweetness that balances the acidity and the heat of the spices.
Mustard seeds
Contribute sharp, pungent flavour that mellows as the sauce sits.
Horseradish
Provides sharp heat and pungency that defines the sauce's character.

Swap the onion

How well each one fits the dish's main ingredients (tomato, horseradish, mustard, pepper, celery, cinnamon, clove):

  1. Lettucefits better
  2. Broccolifits better
  3. Turnipfits better
  4. Onionthe original

Fit is the average pairing score against tomato, horseradish, mustard, pepper, celery, cinnamon, clove. 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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