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French Dressing

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

From an old cookbook · modernised transcription
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Why it works: Onion and olive are a kitchen classic. They rank in the top 8% of all ingredient pairs, and cooks put them together in 29,779 recipes. Both carry 2,4-decadienal, which smells seaweed. The science ↓

French Dressing

Ingredients

Directions

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

  2. Mix well and slowly add olive oil while stirring.

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. Onion + olivetop 8% of all pairs
    Smell alikemoderate
    Cooked together29,779 recipes

    Shared aroma: 2,4-decadienal (seaweed).

  2. Vinegar + olivetop 10% of all pairs
    Smell alikemoderate
    Cooked together12,297 recipes

    Shared aroma: isoamyl acetate (banana, fruity).

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

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

  4. Pepper + olivetop 11% of all pairs
    Smell alikemoderate
    Cooked together30,263 recipes

    Shared aroma: 2,4-decadienal (seaweed).

  5. Onion + vinegartop 14% of all pairs
    Smell alikemoderate
    Cooked 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

Olive oil
Forms the main body of the dressing and carries flavour as the fat component.
Vinegar
Adds acidity that brightens the dressing and balances the richness of the oil.
Onion juice
Adds savoury, aromatic flavour to the dressing.

The step that matters

Adding the olive oil slowly while stirring. Oil and vinegar do not naturally mix. Adding the oil slowly while stirring breaks it into small droplets that stay suspended longer, giving a smoother, less separated dressing.

Swap the onion

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

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

Fit is the average pairing score against pepper, vinegar, olive. 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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