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
Mix mustard, salt, and cayenne until well blended.
Add egg yolk.
Stir in a few drops of olive oil steadily.
When half the oil is used or the dressing thickens, alternate adding a few drops of vinegar.
Continue this process until all oil and vinegar are incorporated.
If the dressing is too thick, beat in a small amount of cream just before serving.
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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Mustard + vinegartop 7% of all pairsSmell alikemoderateCooked together14,067 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Mustard + olivetop 8% of all pairsSmell alikestrongCooked together5,950 recipes
Shared aroma: eucalyptol (eucalyptus, herbal).
-
Mustard + peppertop 9% of all pairsSmell alikemoderateCooked together15,430 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Olive + vinegartop 10% of all pairsSmell alikemoderateCooked together12,297 recipes
Shared aroma: isoamyl acetate (banana, fruity).
-
Pepper + olivetop 11% of all pairsSmell alikemoderateCooked 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 yolk
- Emulsifies the oil and vinegar so the dressing thickens smoothly.
- Olive oil
- Provides the fat that forms the body and richness of the dressing.
- Vinegar
- Adds acidity that balances the richness of the oil and sharpens flavor.
- Mustard
- Helps stabilize the emulsion and adds sharpness.
The step that matters
Adding oil and vinegar slowly. Oil must be added a few drops at a time so it disperses into tiny droplets held by the egg yolk. Adding it too fast breaks the emulsion, leaving the dressing thin and oily instead of thick.
Swap the mustard
How well each one fits the dish's main ingredients (pepper, egg, olive, vinegar, cream):
- Capsicumfits better
- Spinachfits about as well
- Mustardthe original
- Cucumberfits about as well
Fit is the average pairing score against pepper, egg, olive, vinegar, cream. 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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