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 with salt and mustard until fine.
Add olive oil or melted butter to make a paste, using butter if fresh oil is unavailable.
Mix thoroughly and gradually add the vinegar to dilute.
Serve
Pour the dressing over the lettuce.
Slice the additional egg and lay it over the lettuce for 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 form a smooth, thick paste that binds the dressing.
- Olive oil or melted butter
- Adds fat and richness, and helps the mashed yolks form a smooth paste.
- Vinegar
- Adds acidity that sharpens the dressing and thins it when added gradually.
- Mustard
- Adds sharp flavour and helps hold the yolk and oil mixture together.
The step that matters
Add the vinegar gradually. Adding vinegar slowly while mixing lets the yolk and fat emulsion absorb it evenly. Pouring it in all at once can split the paste and leave the dressing thin and watery.
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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