Why it works: Vinegar and pepper are a kitchen classic. They rank in the top 14% of all ingredient pairs, and cooks put them together in 27,814 recipes. Both carry 4'-methylacetophenone, which smells bitter almond. The science ↓
Mayonnaise Dressing
Ingredients
Directions
Prepare
Chill the oil, egg yolk, and bowl on ice until cold.
Beat the yolk until light and foamy.
Make the emulsion
Gradually add the oil, one drop at a time, beating until thick.
Thin the mixture with a little vinegar and continue adding oil until thick.
Add salt and cayenne pepper to taste.
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 + peppertop 14% of all pairsSmell alikemoderateCooked together27,814 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
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Egg + vinegartop 33% of all pairsSmell alikelowCooked together12,922 recipes
Shared aroma: acetic acid (sour, vinegar).
-
Egg + peppertop 33% of all pairsSmell alikelowCooked together50,580 recipes
Shared aroma: 2-nonenal (fatty, green).
Egg and vinegar 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
- Egg yolk
- Its lecithin emulsifies the oil and water so the sauce stays thick instead of separating.
- Oil
- Forms the bulk of the sauce, providing richness and body as tiny droplets suspended in the yolk.
- Vinegar
- Adds acidity that brightens the flavour and helps thin the mixture while it thickens.
The step that matters
Adding the oil. Oil must go in slowly at first, because the yolk can only hold tiny droplets at the start. Adding too much at once breaks the emulsion, and the sauce separates into a greasy liquid.
“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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