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 mayonnaise
In a bowl, beat the raw egg with a wooden spoon until smooth.
Add the salt and mustard, mixing until well combined.
Gradually add the olive oil, a few drops at a time, blending well after each addition.
Continue until the mixture is smooth and thick enough for a spoon to stand in it.
Finish the dressing
Dilute with vinegar or lemon juice until it reaches the consistency of thick cream.
If desired, add a little anchovy for flavor.
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.
-
Mustard + vinegartop 7% of all pairsSmell alikemoderateCooked together14,067 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
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).
-
Olive + anchovytop 12% of all pairsSmell alikemoderateCooked together880 recipes
Shared aroma: hexanol (green, fruity).
-
Egg + anchovytop 12% of all pairsSmell alikemoderateCooked together2,330 recipes
Shared aroma: decanal (soap, orange peel).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Raw egg
- Its yolk lecithin emulsifies the oil and water, holding the dressing together and making it thick.
- Olive oil
- Provides the fat that, dispersed in droplets, gives the dressing its body and richness.
- Mixed mustard
- Helps stabilise the emulsion and adds a sharp, tangy flavour.
- Vinegar or lemon juice
- Adds acidity for brightness and thins the dressing to a creamy consistency.
The step that matters
Adding the olive oil. If oil is poured in too quickly, the droplets cannot be surrounded by the egg yolk and the emulsion breaks, leaving a greasy, runny mixture. Adding it slowly, a few drops at a time, lets the emulsion form and thicken.
Swap the mustard
How well each one fits the dish's main ingredients (egg, olive, vinegar, anchovy):
- Capsicumfits better
- Cucumberfits about as well
- Mustardthe original
- Tomatofits about as well
Fit is the average pairing score against egg, olive, vinegar, anchovy. 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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