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Pickled Onions

Pickled onions are small onions preserved in white wine vinegar with salt and whole white pepper.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 4 ingredients
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Why it works: Wine and vinegar are a kitchen classic. They rank in the top 12% of all ingredient pairs, and cooks put them together in 3,493 recipes. Both carry sotolon, which smells curry, maple. The science ↓

Pickled Onions

Ingredients

Directions

Prepare

  1. Peel the small onions.

  2. In a saucepan, heat the white-wine vinegar.

Make the pickling liquid

  1. Add the salt and whole white pepper.

  2. Boil quickly, then skim the vinegar.

Pickle and store

  1. Add the onions and let them simmer for 3 to 4 minutes.

  2. Once clear, place the onions in a jar and pour the vinegar over them.

  3. Tie down the jar when completely cold.

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. Wine + vinegartop 12% of all pairs
    Smell alikemoderate
    Cooked together3,493 recipes

    Shared aroma: sotolon (curry, maple).

  2. Onion + vinegartop 14% of all pairs
    Smell alikemoderate
    Cooked together18,226 recipes

    Shared aroma: acetic acid (sour, vinegar).

  3. Vinegar + white peppertop 20% of all pairs
    Smell alikelow
    Cooked together1,154 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  4. Onion + winetop 20% of all pairs
    Smell alikemoderate
    Cooked together7,784 recipes

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

  5. Wine + white peppertop 26% of all pairs
    Smell alikelow
    Cooked together288 recipes

    Shared aroma: eucalyptol (eucalyptus, herbal).

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

What each ingredient does

Onions
Main ingredient; they soften and turn mild and tender as they simmer in the hot vinegar.
White-wine vinegar
Provides the acidity that flavours the onions and keeps them tart and preserved.
Whole white pepper
Adds a mild, sharp aroma to the pickling liquid.

The step that matters

Simmer the onions only until clear. Simmering for too long softens the onions past the crisp-tender texture of a good pickle. Stopping once they turn translucent keeps them firm while the hot vinegar still penetrates and seasons them.

Swap the white pepper

How well each one fits the dish's main ingredients (onion, wine, vinegar):

  1. Garlicfits better
  2. Tarragonfits better
  3. Thymefits better
  4. White pepperthe original

Fit is the average pairing score against onion, wine, 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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