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 Dressing
Ingredients
Directions
Prepare
Chill the oil in the refrigerator.
In a deep dish, combine the cold egg yolks, salt, sugar, and white pepper; beat thoroughly.
Make the mayonnaise
Gradually add a few drops of oil while continuously beating in the same direction.
Once the mixture thickens slightly, add a few drops of vinegar.
Continue alternating between adding oil and vinegar until all is incorporated.
Use 1½ tablespoons of vinegar for 1 pint of oil.
Optionally, add ½ teaspoon of mustard 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.
-
Vinegar + mustardtop 7% of all pairsSmell alikemoderateCooked together14,067 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
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).
-
White pepper + vinegartop 20% of all pairsSmell alikelowCooked together1,154 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Egg + sugartop 21% of all pairsSmell alikemoderateCooked together122,807 recipes
Shared aroma: 2-nonenal (fatty, green).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Egg yolks
- Emulsifier that holds the oil and vinegar together, giving the dressing its thick, creamy body.
- Oil
- Supplies the fat that forms the bulk of the emulsion, giving the dressing its rich texture.
- Vinegar
- Adds acidity that balances the richness of the oil and helps stabilise the emulsion.
The step that matters
Adding the oil slowly at the start. Oil must be added a few drops at a time while beating constantly, so tiny droplets disperse and the yolk lecithin can coat them. Adding it too fast breaks the emulsion, leaving a thin, separated dressing.
Swap the mustard
The recipe marks mustard as optional. How well each one fits the dish's main ingredients (egg, sugar, white pepper, vinegar):
- Capsicumfits about as well
- Mustardthe original
- Cucumberfits about as well
- Horseradishfits less well
Fit is the average pairing score against egg, sugar, white pepper, 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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