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 dressing
Combine yolks of 4 fresh raw eggs and 2 hard-boiled eggs in a cold bowl. Beat until smooth.
Gradually add 4 tablespoons of oil a few drops at a time, mixing well until the mixture resembles jelly.
Add 2 heaping teaspoons of salt, 1 teaspoon of pepper, and 1 teaspoon of mustard.
Slowly mix in 2 tablespoons of vinegar.
If the mixture curdles, chill in refrigerator for 40 minutes, then mix again.
Finish and store
For lobster salad, add mashed lobster meat pressed through a sieve.
Store dressing in a cold place until ready to serve; do not mix with salad until serving.
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).
-
Pepper + mustardtop 9% of all pairsSmell alikemoderateCooked together15,430 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Pepper + vinegartop 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).
-
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 yolks
- Emulsifiers that bind oil and vinegar into a stable, thick dressing.
- Oil
- Provides fat that, dispersed into the yolks, gives the dressing its rich body.
- Vinegar
- Adds acidity that brightens flavour and helps keep the emulsion stable.
- Mustard
- Its natural emulsifiers help hold the oil and yolk mixture together.
The step that matters
Adding the oil. Oil must be added a few drops at a time so it disperses into the yolks as tiny droplets. Adding it too fast breaks the emulsion, causing the mixture to curdle or separate.
Swap the mustard
How well each one fits the dish's main ingredients (egg, pepper, vinegar):
- Capsicumfits better
- Mustardthe original
- Cucumberfits about as well
- Cabbagefits less well
Fit is the average pairing score against egg, 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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