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
Make the emulsion
In a bowl, separate the egg whites from the yolk.
Beat the yolk with mustard and vinegar until smooth.
Slowly add the oil while whisking continuously until the mixture thickens.
Season
Season with salt and 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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Mustard + vinegartop 7% of all pairsSmell alikemoderateCooked together14,067 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Mustard + peppertop 9% of all pairsSmell alikemoderateCooked together15,430 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Vinegar + peppertop 14% of all pairsSmell alikemoderateCooked together27,814 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Egg + mustardtop 28% of all pairsSmell alikemoderateCooked together9,210 recipes
Shared aroma: (e)-2-octenal (fatty, green).
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Egg + vinegartop 33% of all pairsSmell alikelowCooked together12,922 recipes
Shared aroma: acetic acid (sour, vinegar).
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
- The yolk's lecithin emulsifies the oil into the vinegar, holding the sauce together.
- Mustard
- Its particles help stabilize the emulsion and add a sharp flavor.
- Vinegar
- Adds acidity that brightens the flavor and balances the richness of the oil.
- Oil
- Forms the fat phase that gives the dressing its thick, creamy body.
The step that matters
Adding the oil slowly while whisking. The oil must be broken into tiny droplets that the yolk can coat. Adding it too fast overwhelms the emulsifier, so the mixture stays runny or separates instead of thickening.
Swap the mustard
How well each one fits the dish's main ingredients (egg, vinegar, pepper):
- Capsicumfits better
- Mustardthe original
- Cucumberfits about as well
- Cabbagefits less well
Fit is the average pairing score against egg, vinegar, pepper. 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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