Why it works: Vinegar and mustard 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 Dekssing
Ingredients
Directions
Place the egg yolk in a cold bowl.
Add the lemon juice, vinegar, salt, mustard, cayenne, and sugar; mix until smooth.
Slowly add the oil, one drop at a time, stirring constantly.
As the mixture thickens, thin it with additional vinegar and lemon juice.
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 + mustardtop 7% of all pairsSmell alikemoderateCooked together14,067 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Olive + lemontop 7% of all pairsSmell alikemoderateCooked together11,922 recipes
Shared aroma: 3-hexenal (apple, fruity).
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Olive + mustardtop 8% of all pairsSmell alikestrongCooked together5,950 recipes
Shared aroma: eucalyptol (eucalyptus, herbal).
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Olive + vinegartop 10% of all pairsSmell alikemoderateCooked together12,297 recipes
Shared aroma: isoamyl acetate (banana, fruity).
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Lemon + mustardtop 11% of all pairsSmell alikestrongCooked together3,816 recipes
Shared aroma: eucalyptol (eucalyptus, herbal).
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, forming a stable, thick mayonnaise.
- Salad oil
- Provides the fat that forms the body and rich texture of the dressing.
- Lemon juice
- Adds acidity that brightens flavor and helps keep the emulsion stable.
- Vinegar
- Adds acidity for sharpness and helps thin and balance the emulsion.
- Mustard
- Acts as a secondary emulsifier that helps hold the oil and liquid together.
The step that matters
Adding the oil slowly while stirring constantly. Oil must be dispersed into the yolk in tiny droplets before more is added. Adding it too fast overwhelms the egg yolk's emulsifier, so the mixture splits and fails to thicken.
Swap the lemon
How well each one fits the dish's main ingredients (olive, vinegar, egg, mustard, sugar):
- Lemonthe original
- Avocadofits about as well
- Cherryfits about as well
- Figfits less well
Fit is the average pairing score against olive, vinegar, egg, mustard, sugar. 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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