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Mayonnaise Dressing

A creamy dressing made from eggs, mustard, oil, vinegar, salt, and cayenne pepper.

From an old cookbook · modernised transcription
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Why it works: Mustard and vinegar 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 ↓

Mayonnaise Dressing

Ingredients

Directions

  1. Combine eggs, salt, dry mustard, and cayenne pepper in a bowl.

  2. Beat the mixture with a whisk until well combined.

  3. Slowly add olive oil while whisking until emulsified.

  4. Stir in vinegar until fully incorporated.

  5. If too thick, add the white of one egg to loosen.

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. Mustard + vinegartop 7% of all pairs
    Smell alikemoderate
    Cooked together14,067 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  2. Mustard + olivetop 8% of all pairs
    Smell alikestrong
    Cooked together5,950 recipes

    Shared aroma: eucalyptol (eucalyptus, herbal).

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

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

  4. Olive + vinegartop 10% of all pairs
    Smell alikemoderate
    Cooked together12,297 recipes

    Shared aroma: isoamyl acetate (banana, fruity).

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

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

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

What each ingredient does

Eggs
Egg yolks emulsify the oil and vinegar, giving the dressing its thick, creamy body.
Olive oil
Forms the fat phase of the emulsion, providing richness and body.
Vinegar
Adds acidity that balances the richness of the oil and eggs.
Dry mustard
Its compounds help stabilise the emulsion and add sharp flavour.

The step that matters

Slowly add olive oil while whisking until emulsified. Adding oil too fast overwhelms the egg's emulsifying proteins, so the oil separates instead of forming a thick, stable dressing. Adding it gradually in a thin stream lets the droplets disperse evenly.

Swap the mustard

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

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

Fit is the average pairing score against egg, pepper, olive, 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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