Why it works: Mustard and vinegar are a kitchen classic. They rank in the top 4% of all ingredient pairs, and 14,067 recipes mention both. Both carry isobutyraldehyde, which smells malty, green. The science ↓
The recipe
Ingredients
Contains: egg, milk (auto-detected from the ingredients and method; we can miss things, so check labels)
Also mentioned in the method: cream
Directions
Make the base
Beat the raw egg yolk with enough oil to make the mixture as thick as cream.
Make the starch mixture
Cook the corn starch in water until thickened.
Add the coarse sea salt, mustard, sugar, and vinegar to the corn starch mixture.
Combine
Beat all ingredients together until well combined.
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 aroma chemistry they share, and how many recipes mention both.
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Mustard + vinegartop 4% of all pairsAroma overlaplowMentioned together14,067 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Sugar + vinegartop 8% of all pairsAroma overlapmoderateMentioned together20,804 recipes
Shared aroma: beta-damascenone (apple, rose).
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Corn + mustardtop 8% of all pairsAroma overlapstrongMentioned together463 recipes
Shared aroma: (e)-2-octenal (fatty, green).
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Egg + sugartop 10% of all pairsAroma overlapstrongMentioned together122,252 recipes
Shared aroma: 2-nonenal (fatty, green).
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Mustard + sugartop 11% of all pairsAroma overlapmoderateMentioned together8,424 recipes
Shared aroma: guaiacol (smoky, sweet).
Mustard and vinegar share little aroma chemistry, yet 14,067 recipes mention both: they likely 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
- Raw egg yolk
- Emulsifies the oil and water into a stable, creamy mixture.
- Oil
- Provides richness and body, forming the bulk of the emulsion.
- Corn starch
- Thickens the water so the mayonnaise stays stable and spoonable.
- Mustard
- Adds sharpness and helps stabilise the emulsion.
- Vinegar
- Adds acidity that brightens flavour and balances the richness.
The step that matters
Beat the egg yolk with oil until thick as cream. The yolk must be given enough oil while beating so its lecithin can disperse the oil into tiny droplets. Adding oil too fast or beating too little can cause the emulsion to break and separate.
Flavor stand-ins for the mustard
How well each one fits the dish's main ingredients (egg, corn, sugar, vinegar):
- Capsicumbetter flavor fit
- Cucumberabout as good a flavor fit
- Asparagusabout as good a flavor fit
- Mustardthe original
Fit is the average pairing score against egg, corn, sugar, vinegar. Candidates are from the same food group and used in at least 100 recipes. This compares flavor only: it does not check the job the ingredient does in the dish (bulk, moisture, acidity, structure).
“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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