Why it works: Mustard and lettuce match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 1,356 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Lettuce Salad
Ingredients
Directions
Make the dressing
Mash the yolks of the hard-boiled eggs finely.
Add coarse sea salt and mustard to taste.
Mix in 2 teaspoons of olive oil or melted butter to form a paste.
Gradually add 1 teacup of vinegar and mix thoroughly.
Serve
Pour the dressing over the lettuce.
Slice the additional hard-boiled egg and lay it over the lettuce as a garnish.
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 + lettucetop 1% of all pairsSmell alikestrongCooked together1,356 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Olive + lettucetop 5% of all pairsSmell alikestrongCooked together2,580 recipes
Shared aroma: trans-2-hexenal (green, leafy).
-
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).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Egg yolks
- Emulsify with the oil or butter to give the dressing a thick, smooth body.
- Olive oil or melted butter
- Adds fat that carries flavour and helps bind the mashed yolks into a paste.
- Vinegar
- Adds acidity that sharpens the dressing and balances the richness of the yolks and fat.
The step that matters
Gradually add the vinegar. Adding the vinegar slowly while mixing lets the yolk and fat emulsify into a smooth dressing. Pouring it in all at once can break the mixture into a thin, separated liquid.
Swap the lettuce
How well each one fits the dish's main ingredients (egg, mustard, olive, vinegar):
- Horseradishfits about as well
- Cucumberfits about as well
- Lettucethe original
- Shallotfits about as well
Fit is the average pairing score against egg, mustard, olive, 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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