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 ↓
Salad Dressing
Ingredients
Directions
Prepare
Chill the olive oil, bowl, and spoon before starting.
Separate the eggs.
In a bowl, mix the dry ingredients: salt, mustard, powdered sugar, and paprika.
Make the emulsion
Add the egg yolks and mix well.
Slowly add the olive oil, one drop at a time, while stirring constantly.
As the mixture thickens, alternate adding lemon juice and vinegar to thin it out.
Continue adding the remaining olive oil until fully incorporated.
Finish
Fold in the beaten egg whites at the end.
For a white dressing, use all lemon juice.
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.
Photo for illustrative purposes only · Contact us to use it
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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Lemon + olivetop 7% of all pairsSmell alikemoderateCooked together11,922 recipes
Shared aroma: 3-hexenal (apple, fruity).
-
Mustard + olivetop 8% of all pairsSmell alikestrongCooked together5,950 recipes
Shared aroma: eucalyptol (eucalyptus, herbal).
-
Vinegar + olivetop 10% of all pairsSmell alikemoderateCooked together12,297 recipes
Shared aroma: isoamyl acetate (banana, fruity).
-
Mustard + lemontop 11% of all pairsSmell alikestrongCooked together3,816 recipes
Shared aroma: eucalyptol (eucalyptus, herbal).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Eggs
- Egg yolks contain lecithin, which helps hold the oil and vinegar together as an emulsion.
- Olive oil
- Provides the fat that gives the dressing its body and rich mouthfeel.
- Mustard
- Helps stabilize the emulsion and adds a sharp, tangy flavor.
- Lemon juice
- Adds acidity that brightens the flavor and thins the thickening mixture.
- Vinegar
- Adds acidity that sharpens flavor and helps loosen the emulsion.
- Powdered sugar
- Adds mild sweetness that balances the sharpness of the acids.
The step that matters
Adding the olive oil slowly. Oil must be dispersed into the yolk mixture in tiny droplets while stirring constantly. Adding it too fast overwhelms the yolks' ability to bind it, so the emulsion breaks and the dressing separates instead of thickening.
Swap the lemon
How well each one fits the dish's main ingredients (mustard, sugar, vinegar, egg, olive):
- Lemonthe original
- Avocadofits about as well
- Cherryfits about as well
- Figfits less well
Fit is the average pairing score against mustard, sugar, vinegar, egg, olive. 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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