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 ↓
Made Mustard
Ingredients
Directions
Pour a little boiling water over the mustard.
Add the coarse sea salt and stir in the olive oil slowly.
Mix in the sugar and the beaten egg yolk.
Pour in vinegar to taste.
Let it sit overnight for best 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.
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Mustard + vinegartop 7% of all pairsSmell alikemoderateCooked together14,067 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Mustard + olivetop 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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Sugar + vinegartop 15% of all pairsSmell alikemoderateCooked together20,806 recipes
Shared aroma: beta-damascenone (apple, rose).
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Mustard + sugartop 19% of all pairsSmell alikemoderateCooked together8,424 recipes
Shared aroma: guaiacol (smoky, sweet).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Mustard
- Provides the main sharp, pungent flavor of the sauce.
- Egg yolk
- Its lecithin helps bind the oil and watery parts into a smooth, creamy emulsion.
- Olive oil
- Adds fat and richness, giving the sauce a smooth, rounded texture.
- Sugar
- Softens the sharpness of the mustard and vinegar for a rounder balance.
- Vinegar
- Adds acidity that brightens the flavor and cuts the richness of the oil.
The step that matters
Stirring in the olive oil slowly. Egg yolk and mustard can only hold oil in suspension if it is added gradually while stirring. Adding it too fast breaks the emulsion, so the sauce turns oily and separates instead of staying thick and smooth.
Swap the mustard
How well each one fits the dish's main ingredients (olive, sugar, egg, vinegar):
- Capsicumfits about as well
- Cucumberfits about as well
- Mustardthe original
- Asparagusfits less well
Fit is the average pairing score against olive, sugar, egg, 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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