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French Dressing

A vinaigrette made with oil, vinegar, mustard, salt, pepper, cayenne, and beaten eggs.

From an old cookbook · modernised transcription
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Why it works: Vinegar and mustard are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 14,067 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓

French Dressing

Ingredients

Directions

  1. Heat the vinegar in a kettle of hot water until it scalds.

  2. Add the oil, mustard, salt, pepper, and cayenne to the vinegar.

  3. Stir the mixture until it thickens.

  4. Finally, mix in the beaten eggs.

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. Vinegar + mustardtop 7% of all pairs
    Smell alikemoderate
    Cooked together14,067 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  2. Mustard + peppertop 9% of all pairs
    Smell alikemoderate
    Cooked together15,430 recipes

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

  3. Vinegar + peppertop 14% of all pairs
    Smell alikemoderate
    Cooked together27,814 recipes

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

  4. Mustard + eggtop 28% of all pairs
    Smell alikemoderate
    Cooked together9,210 recipes

    Shared aroma: (e)-2-octenal (fatty, green).

  5. Vinegar + eggtop 33% of all pairs
    Smell alikelow
    Cooked together12,922 recipes

    Shared aroma: acetic acid (sour, vinegar).

Vinegar and egg barely smell alike, yet cooks put them together in 12,922 recipes: they work on texture and structure more than aroma.

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 dressing its tang.
Oil
Adds richness and body, and carries flavour through the dressing.
Mustard
Helps oil and vinegar stay combined by acting as an emulsifier.
Eggs
Their proteins set when heated, thickening the dressing and giving it body.

The step that matters

Mix in the beaten eggs last. Egg proteins thicken the dressing as they warm, but if the mixture is too hot they can scramble into lumps. Adding them last and stirring steadily keeps the dressing smooth.

Swap the mustard

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

  1. Capsicumfits better
  2. Mustardthe original
  3. Cucumberfits about as well
  4. Cabbagefits less well

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