Why it works: Pepper and onion are a kitchen classic. They rank in the top 11% of all ingredient pairs, and cooks put them together in 68,474 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
French Dressing for Salads
Ingredients
Directions
In a bowl, combine salt and pepper.
Add oil, onion juice, and vinegar in the order given, then mix well until combined.
Use for vegetable, egg, meat, or fish salads.
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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Pepper + oniontop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Onion + vinegartop 14% of all pairsSmell alikemoderateCooked together18,226 recipes
Shared aroma: acetic acid (sour, vinegar).
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Pepper + vinegartop 14% of all pairsSmell alikemoderateCooked together27,814 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Oil
- Forms the base of the dressing, carrying flavour and giving a smooth, rich mouthfeel.
- Vinegar
- Adds acidity that sharpens the flavour and balances the richness of the oil.
- Onion juice
- Adds a savoury aroma and flavour without adding solid pieces.
The step that matters
Mix well until combined. Oil and vinegar do not mix on their own. Thorough mixing breaks the oil into tiny droplets dispersed through the vinegar, which makes the dressing look uniform and coat salad leaves evenly. If it is not mixed well, the oil and vinegar separate quickly.
Swap the onion
How well each one fits the dish's main ingredients (pepper, vinegar):
- Capsicumfits better
- Mustardfits better
- Cabbagefits better
- Onionthe original
Fit is the average pairing score against pepper, 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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