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Cucumber Catsup

A pickled cucumber condiment made with vinegar, sugar, mustard seed, black pepper, and allspice.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 8 ingredients
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Why it works: Mustard and allspice match in chemistry and in kitchens. They rank in the top 2% of all ingredient pairs, and cooks put them together in 1,928 recipes. Both carry methyleugenol, which smells clove, spice. The science ↓

Cucumber Catsup

Ingredients

Directions

The book gives no cooking times; the times in the steps were added in transcription, so check for doneness rather than trusting the clock.

Prepare

  1. Peel and chop the cucumbers and onion.

  2. Mix with salt and let sit for 24 hours.

  3. Drain the mixture and add vinegar, sugar, mustard seed, black pepper, and allspice.

Bottle and store

  1. Bottle the mixture and seal tightly.

  2. Store in a cool, dark place.

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. Mustard + allspicetop 2% of all pairs
    Smell alikestrong
    Cooked together1,928 recipes

    Shared aroma: methyleugenol (clove, spice).

  2. Cucumber + mustardtop 3% of all pairs
    Smell alikestrong
    Cooked together2,281 recipes

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

  3. Pepper + allspicetop 5% of all pairs
    Smell alikestrong
    Cooked together6,395 recipes

    Shared aroma: estragole (anise, licorice).

  4. Onion + mustardtop 6% of all pairs
    Smell alikestrong
    Cooked together9,259 recipes

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

  5. Vinegar + mustardtop 7% of all pairs
    Smell alikemoderate
    Cooked together14,067 recipes

    Shared aroma: isobutyraldehyde (malty, green).

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

What each ingredient does

Cucumbers
Make up the bulk of the ketchup, providing its fresh, watery body once salted and drained.
Salt
Draws water out of the cucumbers and onion, concentrating their flavor and firming their texture.
Vinegar
Provides the acidity that gives the ketchup its tang and helps preserve it.
Sugar
Balances the sharp acidity of the vinegar with a touch of sweetness.

The step that matters

Salting and resting the vegetables for 24 hours. Salt draws moisture out of the cucumbers and onion through osmosis. Draining this liquid before adding vinegar keeps the ketchup thick and prevents it from becoming watery in the bottle.

Swap the onion

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

  1. Horseradishfits better
  2. Radishfits better
  3. Lettucefits better
  4. Onionthe original

Fit is the average pairing score against cucumber, vinegar, sugar, mustard, pepper, allspice. 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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