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Mayonnaise Dressing

A simple mayonnaise dressing made with egg yolks, salt, mustard, cayenne pepper, olive oil, and vinegar.

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. Beat the yolks of 2 raw eggs slightly.

  2. Add ¼ teaspoon of coarse sea salt, ¼ teaspoon of mustard, and a pinch of cayenne pepper.

  3. Add olive oil drop by drop, stirring constantly until it thickens.

  4. Thin the mixture with vinegar, alternating with the oil, until ½ pint has been absorbed.

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

Egg yolks
Emulsifiers that bind the oil and water so the dressing thickens smoothly.
Olive oil
Supplies the fat that, emulsified into the yolks, builds the thick body of the dressing.
Vinegar
Thins the emulsion and adds acidity that balances the richness of the oil.
Mustard
Helps stabilise the emulsion and adds a sharp, savoury flavour.

The step that matters

Adding the oil drop by drop. Oil must be dispersed into the yolks in small amounts while stirring constantly. Adding it too fast overwhelms the yolk emulsifiers, so the mixture splits and fails to thicken.

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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