Name: Sliced Cucumber Pickles
Ingredients: 12 sour cucumbers, sliced; 2 large onions, sliced; 1 pint vinegar; ½ cup sugar; 1 teaspoon turmeric; 1 teaspoon mustard seed; 1 teaspoon celery seed; 3 teaspoons grated horseradish

Why it works: Mustard and horseradish 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 ↓

Sliced Cucumber Pickles

Ingredients

Directions

Combine vinegar, sugar, turmeric, mustard seed, celery seed, and horseradish in a pot.
Bring the mixture to a boil.
Pour the hot mixture over the sliced cucumbers and onions.

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.

Mustard + horseradishtop 1% of all pairs

Smell alikestrong

Cooked together1,832 recipes

Shared aroma: coumarin (sweet, hay).
Mustard + celerytop 2% of all pairs

Smell alikemoderate

Cooked together4,169 recipes

Shared aroma: guaiacol (smoky, sweet).
Cucumber + horseradishtop 2% of all pairs

Smell alikestrong

Cooked together640 recipes

Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Turmeric + mustardtop 3% of all pairs

Smell alikestrong

Cooked together2,279 recipes

Shared aroma: guaiacol (smoky, sweet).
Cucumber + mustardtop 3% of all pairs

Smell alikestrong

Cooked together2,281 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

Vinegar: Provides the sharp acidity that gives the pickle its tang and helps preserve it.
Sugar: Adds sweetness that balances the acidity of the vinegar.
Sour cucumbers: Form the bulk of the pickle and soak up the flavour of the hot brine.
Onions: Add savoury flavour and soften slightly as they absorb the hot brine.
Horseradish: Adds pungent heat and a sharp aroma that cuts through the sweetness.
Turmeric: Gives the pickling liquid its yellow colour and a mild earthy flavour.

The step that matters

Pour the hot mixture over the sliced cucumbers and onions. The brine must be hot when poured. Heat helps the liquid penetrate the vegetables and season them evenly, and a cooler brine would soak in more slowly and unevenly.

Swap the onion

How well each one fits the dish's main ingredients (cucumber, vinegar, sugar, turmeric, mustard, celery, horseradish):

Radishfits better
Cauliflowerfits better
Beetrootfits better
Onionthe original

Fit is the average pairing score against cucumber, vinegar, sugar, turmeric, mustard, celery, horseradish. 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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Sliced Cucumber Pickles