Why it works: Vinegar and mustard 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
Mix the flour, cayenne pepper, sugar, and salt in a bowl.
In a separate bowl, beat the eggs and add the vinegar and water.
Combine the wet and dry ingredients.
Cook and finish
Cook the mixture over hot water until thick, stirring constantly.
If using butter, add it after thickening.
If using olive oil, add it very slowly while stirring.
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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Vinegar + mustardtop 7% of all pairsSmell alikemoderateCooked together14,067 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Mustard + olivetop 8% of all pairsSmell alikestrongCooked together5,950 recipes
Shared aroma: eucalyptol (eucalyptus, herbal).
-
Pepper + mustardtop 9% of all pairsSmell alikemoderateCooked together15,430 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Vinegar + olivetop 10% of all pairsSmell alikemoderateCooked together12,297 recipes
Shared aroma: isoamyl acetate (banana, fruity).
-
Pepper + olivetop 11% of all pairsSmell alikemoderateCooked together30,263 recipes
Shared aroma: 2,4-decadienal (seaweed).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Eggs
- Thicken the dressing as they set when gently heated, giving body to the sauce.
- Flour
- Thickens the liquid by absorbing water and swelling as it heats.
- Vinegar
- Adds acidity that gives the dressing its sharp, tangy flavor.
- Sugar
- Balances the acidity with sweetness.
- Olive oil or butter
- Adds richness and fat, giving the dressing a smoother mouthfeel.
The step that matters
Adding the oil or butter. Fat added too quickly to a hot egg mixture can fail to emulsify and may curdle or separate. Adding olive oil slowly while stirring lets it disperse evenly, and adding butter after thickening keeps the dressing smooth.
Swap the mustard
How well each one fits the dish's main ingredients (flour, pepper, sugar, egg, vinegar, olive):
- Capsicumfits better
- Mustardthe original
- Cucumberfits about as well
- Shallotfits about as well
Fit is the average pairing score against flour, pepper, sugar, egg, vinegar, 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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