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 ↓
Sliced Cucumber Pickle
Ingredients
Directions
Prepare
Pare and slice the cucumbers and onions thick.
Layer them in an earthen bowl, sprinkling salt between the layers.
Let them stand for 6 hours.
Drain off the water.
Pickle and store
Transfer to a jar and add a red pepper pod.
Cover with cold vinegar and add 1 teaspoon of sweet oil for each quart of pickles.
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).
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Cucumber + peppertop 12% of all pairsSmell alikemoderateCooked together5,991 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Onion + vinegartop 14% of all pairsSmell alikemoderateCooked together18,226 recipes
Shared aroma: acetic acid (sour, vinegar).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Cucumbers
- Form the main body of the pickles, becoming crisp-tender as they cure in salt and vinegar.
- Onions
- Add sharp, aromatic flavour that mellows during the pickling time.
- Coarse sea salt
- Draws water out of the cucumbers and onions, firming them and seasoning the pickles.
- Cold vinegar
- Provides acidity that preserves the vegetables and gives the pickles their tang.
- Sweet oil
- Adds richness and a smooth mouthfeel to the pickling liquid.
The step that matters
Draining after salting. Salt draws water out of the vegetables by osmosis. Draining off that liquid before jarring keeps the pickles firm and stops the vinegar from being diluted.
Swap the onion
How well each one fits the dish's main ingredients (cucumber, pepper, vinegar):
- Capsicumfits better
- Radishfits better
- Mustardfits better
- Onionthe original
Fit is the average pairing score against cucumber, pepper, vinegar. 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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