Why it works: Pepper and celery match in chemistry and in kitchens. They rank in the top 5% of all ingredient pairs, and cooks put them together in 16,012 recipes. Both carry 4'-methylacetophenone, which smells bitter almond. The science ↓
Cucumber Catsup
Ingredients
Directions
Prepare the cucumbers
Peel and grate the cucumbers.
Drain the grated cucumbers well.
Make the ketchup
Measure the water that strains out and add an equal amount of vinegar.
Season the mixture with salt, pepper, celery seed, and chopped onions.
Mix well and bottle tightly with sealing wax.
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.
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Pepper + celerytop 5% of all pairsSmell alikestrongCooked together16,012 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
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Celery + oniontop 7% of all pairsSmell alikemoderateCooked together18,518 recipes
Shared aroma: guaiacol (smoky, sweet).
-
Cucumber + celerytop 8% of all pairsSmell alikemoderateCooked together1,745 recipes
Shared aroma: linalool (floral, citrus).
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Cucumber + oniontop 8% of all pairsSmell alikestrongCooked together6,050 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Cucumber + vinegartop 8% of all pairsSmell alikemoderateCooked together4,734 recipes
Shared aroma: 2-methylbutyl acetate (fruit).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Cucumbers
- Provide the main body and fresh, watery base of the ketchup.
- Vinegar
- Adds acidity that sharpens flavor and helps keep the ketchup preserved.
- Onions
- Add savory sweetness and aromatic depth as they mellow in the mixture.
- Celery seed
- Adds a warm, earthy aroma that gives the ketchup its characteristic flavor.
The step that matters
Drain the grated cucumbers well. The drained liquid sets how much vinegar you add, so the balance depends on removing as much water as you can. Leftover excess water dilutes the flavor and can make the ketchup thin and less stable in storage.
Swap the onion
How well each one fits the dish's main ingredients (cucumber, vinegar, pepper, celery):
- Mustardfits better
- Capsicumfits better
- Lettucefits better
- Onionthe original
Fit is the average pairing score against cucumber, vinegar, pepper, celery. 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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