Why it works: Cucumber and onion match in chemistry and in kitchens. They rank in the top 8% of all ingredient pairs, and cooks put them together in 6,050 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
French Pickle
Ingredients
Directions
Prepare
Peel and slice the cucumbers about ½ inch thick, removing the seeds.
Slice the onions, place them in a dish, sprinkle salt over them, and let them stand for 12 hours.
Pickle and age
Drain the onions well and place them in a jar with the vinegar, sherry, soy sauce, and cayenne pepper.
Seal the jar with a bladder and let it sit for one month before using.
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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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).
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Onion + peppertop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Sherry + vinegartop 11% of all pairsSmell alikemoderateCooked together660 recipes
Shared aroma: 4-ethyl-2-methoxyphenol (smoky, clove).
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Cucumber + peppertop 12% of all pairsSmell alikemoderateCooked together5,991 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Cucumbers
- Form the bulk of the pickle and stay crisp-textured as they cure in the brine.
- Onions
- Add pungency and sweetness, softened somewhat by the salt and the long soak.
- Vinegar
- Provides acidity that preserves the vegetables and gives the pickle its sharp flavour.
- Salt
- Draws moisture out of the onions and seasons the vegetables before pickling.
- Indian soy sauce
- Adds savoury depth and salty umami to the pickling liquid.
The step that matters
Draining the onions well after salting. Salt draws water out of the onions; any liquid left clinging to them dilutes the vinegar brine and weakens its acidity and preservative effect.
Swap the onion
How well each one fits the dish's main ingredients (cucumber, sauce, sherry, vinegar, pepper):
- Capsicumfits better
- Mustardfits better
- Horseradishfits better
- Onionthe original
Fit is the average pairing score against cucumber, sauce, sherry, vinegar, pepper. 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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