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Sauce

Cold Catsup

A cold tomato-based condiment with horseradish, mustard seeds, spices, and vinegar.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 13 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. Chop the tomatoes finely and drain them.

Mix and store

  1. In a large bowl, mix the drained tomatoes with horseradish, mustard seeds, sugar, salt, black pepper, cinnamon, cloves, mace, chopped red pepper, chopped onion, celery seed, and vinegar.

  2. Bottle the mixture and store it.

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

    Shared aroma: ethyl octanoate (fruity, wine).

  4. Horseradish + cinnamontop 6% of all pairs
    Smell alikestrong
    Cooked together515 recipes

    Shared aroma: coumarin (sweet, hay).

  5. Clove + macetop 6% of all pairs
    Smell alikelow
    Cooked together8,400 recipes

    Shared aroma: methyleugenol (clove, spice).

Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs

What each ingredient does

Ripe tomatoes
Form the body of the ketchup and supply its main flavor and moisture.
Sugar
Adds sweetness that balances the acidity of the vinegar and tomatoes.
Vinegar
Provides acidity that gives the ketchup its tang and helps preserve it.
Mustard seeds
Add a sharp, pungent bite and a bit of texture to the sauce.
Horseradish
Contributes a pungent heat that sharpens the overall flavor.

Swap the mace

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

  1. Allspicefits better
  2. Nutmegfits better
  3. Cardamomfits better
  4. Macethe original

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