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
In a bowl, mix salt and egg yolks with a wooden spoon.
Add dry mustard and mix until smooth using a hand mixer.
Gradually add salad oil, a few drops at a time, beating until thick.
Finally, add vinegar until the dressing reaches the desired consistency.
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).
-
Mustard + eggtop 28% of all pairsSmell alikemoderateCooked together9,210 recipes
Shared aroma: (e)-2-octenal (fatty, green).
-
Vinegar + eggtop 33% of all pairsSmell alikelowCooked together12,922 recipes
Shared aroma: acetic acid (sour, vinegar).
Vinegar and egg 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
- Emulsifier that holds the oil and vinegar together, giving the dressing its thick, creamy structure.
- Salad oil
- Fat that forms the body of the dressing when beaten slowly into the yolks.
- Dry mustard
- Helps stabilise the emulsion and adds a sharp, savoury flavour.
- Strong vinegar
- Adds acidity that brightens the flavour and thins the dressing to the desired consistency.
The step that matters
Adding the oil gradually. Oil added too fast cannot be absorbed by the egg yolks, so the emulsion breaks and the dressing separates. Adding it a few drops at a time while beating lets the yolk coat each droplet and stay thick.
Swap the mustard
How well each one fits the dish's main ingredients (vinegar, egg):
- Cucumberfits about as well
- Mustardthe original
- Capsicumfits about as well
- Shallotfits less well
Fit is the average pairing score against vinegar, egg. 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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