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 ↓
Tomato Salad Dressing
Ingredients
Directions
Make the dressing
Combine vinegar, sugar, salt, mustard, and beaten egg in a bowl.
Cook the mixture over hot water until thickened.
Serve
Let it cool, then pour over tomatoes.
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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Vinegar + mustardtop 7% of all pairsSmell alikemoderateCooked together14,067 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Vinegar + sugartop 15% of all pairsSmell alikemoderateCooked together20,806 recipes
Shared aroma: beta-damascenone (apple, rose).
-
Sugar + mustardtop 19% of all pairsSmell alikemoderateCooked together8,424 recipes
Shared aroma: guaiacol (smoky, sweet).
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Sugar + eggtop 21% of all pairsSmell alikemoderateCooked together122,807 recipes
Shared aroma: 2-nonenal (fatty, green).
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Mustard + eggtop 28% of all pairsSmell alikemoderateCooked together9,210 recipes
Shared aroma: (e)-2-octenal (fatty, green).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Egg
- Thickens the dressing as it cooks and gives it a creamy body.
- Vinegar
- Provides the sharp acidity that gives the dressing its tang.
- Sugar
- Balances the acidity with sweetness.
- Mustard
- Adds sharpness and aroma that complement the acidity.
The step that matters
Cook the mixture over hot water until thickened. The egg proteins set gently as they warm, thickening the dressing. Heating too fast or too long can scramble the egg, leaving lumps instead of a smooth, uniform dressing. Gentle, indirect heat from hot water helps prevent this.
Swap the mustard
How well each one fits the dish's main ingredients (vinegar, sugar, egg):
- Mustardthe original
- Capsicumfits about as well
- Cucumberfits about as well
- Shallotfits less well
Fit is the average pairing score against vinegar, sugar, 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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