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
Beat the egg yolks until very light.
Stir in the sugar, salt, and mustard.
Slowly add the olive oil while stirring constantly.
Keep the eggs and oil cold, using ice if necessary.
If the dressing is too thin, reduce the amount of vinegar.
Optionally, fold in stiffly beaten egg whites or a little cream.
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).
-
Olive + vinegartop 10% of all pairsSmell alikemoderateCooked together12,297 recipes
Shared aroma: isoamyl acetate (banana, fruity).
-
Sugar + vinegartop 15% of all pairsSmell alikemoderateCooked together20,806 recipes
Shared aroma: beta-damascenone (apple, rose).
-
Sugar + mustardtop 19% of all pairsSmell alikemoderateCooked together8,424 recipes
Shared aroma: guaiacol (smoky, sweet).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Egg yolks
- Emulsify the oil into droplets, forming a thick, stable sauce.
- Olive oil
- Provides the fat that gives the dressing its body and richness.
- Vinegar
- Adds acidity for flavour and helps thin the dressing to the right consistency.
- Mustard
- Helps stabilise the emulsion and adds sharpness.
The step that matters
Slowly add the olive oil while stirring constantly. Egg yolk lecithin can only hold oil in tiny droplets if the oil is added gradually. Adding it too fast overwhelms the yolks, so the emulsion breaks and the dressing separates into a greasy liquid.
Swap the mustard
How well each one fits the dish's main ingredients (egg, sugar, olive, vinegar):
- Capsicumfits about as well
- Cucumberfits about as well
- Mustardthe original
- Asparagusfits less well
Fit is the average pairing score against egg, sugar, 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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