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 ↓
Mayonnaise Dressing
Ingredients
Directions
Make the dressing
In a bowl, mix the salad oil, sugar, coarse sea salt, and mustard until well combined.
Add the well-beaten egg yolks and mix thoroughly.
Stir in the vinegar and then the milk or cream.
Cook
Place the bowl in a saucepan with boiling water, ensuring the water surrounds the bowl to half its depth.
Stir the mixture over heat until it thickens to the consistency of custard.
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.
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Vinegar + mustardtop 7% of all pairsSmell alikemoderateCooked together14,067 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Vinegar + sugartop 15% of all pairsSmell alikemoderateCooked together20,806 recipes
Shared aroma: beta-damascenone (apple, rose).
-
Milk + eggtop 18% of all pairsSmell alikemoderateCooked together88,785 recipes
Shared aroma: 2-nonenal (fatty, green).
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Milk + sugartop 18% of all pairsSmell alikelowCooked together77,875 recipes
Shared aroma: 2-nonenal (fatty, green).
-
Sugar + mustardtop 19% of all pairsSmell alikemoderateCooked together8,424 recipes
Shared aroma: guaiacol (smoky, sweet).
Milk and sugar barely smell alike, yet cooks put them together in 77,875 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
- Egg yolks
- Their proteins set as they heat, thickening the dressing to a custard-like body.
- Salad oil
- Adds fat that gives the dressing richness and a smooth, silky mouthfeel.
- Vinegar
- Provides acidity, giving the dressing its sharp, tangy flavour.
- Milk or single cream
- Adds moisture and dairy richness, softening the dressing and mellowing the vinegar.
- Mustard
- Its natural compounds help hold the oil and liquids together as an emulsion.
- Sugar
- Adds sweetness that balances the acidity of the vinegar.
The step that matters
Stirring the mixture over heat until it thickens. Egg yolks set gently with steady, gentle heat. If the mixture gets too hot or is left unstirred, the yolks can scramble and curdle, so keep it moving and avoid overheating.
Swap the mustard
How well each one fits the dish's main ingredients (milk, vinegar, egg, sugar):
- Capsicumfits better
- Mustardthe original
- Cucumberfits about as well
- Sweet potatofits about as well
Fit is the average pairing score against milk, vinegar, egg, sugar. 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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