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French Dressing with Onion

A vinaigrette made with salt, pepper, oil, onion juice, vinegar, and ice.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 ingredients
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Why it works: Pepper and onion are a kitchen classic. They rank in the top 11% of all ingredient pairs, and cooks put them together in 68,474 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓

French Dressing with Onion

Ingredients

Directions

  1. In a bowl, combine the salt, pepper, oil, onion juice, and vinegar.

  2. Add a few small lumps of ice to the mixture.

  3. Beat thoroughly until well mixed.

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. Pepper + oniontop 11% of all pairs
    Smell alikemoderate
    Cooked together68,474 recipes

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

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

    Shared aroma: acetic acid (sour, vinegar).

  3. Pepper + vinegartop 14% of all pairs
    Smell alikemoderate
    Cooked together27,814 recipes

    Shared aroma: 4'-methylacetophenone (bitter almond).

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

What each ingredient does

Oil
Forms the body of the dressing and carries flavour.
Vinegar
Adds acidity that brightens the dressing and balances the oil.
Onion juice
Provides the onion flavour that defines the dressing.

The step that matters

Beat thoroughly with the ice. Beating breaks the oil into tiny droplets dispersed in the vinegar, creating an emulsion that stays creamy. Beating until well mixed matters because under-beaten oil and vinegar separate quickly. The ice lumps help cool the mixture, which slows separation and helps it thicken.

Swap the onion

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

  1. Capsicumfits better
  2. Mustardfits better
  3. Cabbagefits better
  4. Onionthe original

Fit is the average pairing score against 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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