Why it works: Mustard and onion match in chemistry and in kitchens. They rank in the top 6% of all ingredient pairs, and cooks put them together in 9,259 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Brussels Sprouts with Curry Sauce
Ingredients
Directions
Prepare the sprouts
Pick over Brussels sprouts, remove wilted leaves, and soak in cold salt water for 15 minutes.
Cook in boiling salted water for 20 minutes, or until easily pierced with a skewer.
Drain the Brussels sprouts and pour over ½ cup curry sauce.
Make the curry sauce
To make the curry sauce, mix ¼ teaspoon mustard, ¼ teaspoon salt, and a few grains of paprika.
Add the beaten egg yolk, olive oil, vinegar, and onion juice.
Cook over hot water, stirring constantly until the mixture thickens.
Stir in ¼ teaspoon curry powder, melted butter, and chopped parsley.
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 + oniontop 6% of all pairsSmell alikestrongCooked together9,259 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Mustard + vinegartop 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).
-
Olive + oniontop 8% of all pairsSmell alikemoderateCooked together29,779 recipes
Shared aroma: 2,4-decadienal (seaweed).
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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
- Brussels sprouts
- Form the main vegetable; cooking softens them until a skewer pierces them easily.
- Egg yolk
- Emulsifies the oil and vinegar and thickens the sauce as it heats.
- Olive oil
- Adds fat and richness, helping form a smooth emulsified sauce.
- Vinegar
- Adds acidity that sharpens the sauce and balances the richness of the yolk and oil.
- Butter
- Adds fat and a rounder, richer flavor to the finished sauce.
The step that matters
Cook the sauce over hot water while stirring constantly. Egg yolk thickens with gentle heat but can scramble if overheated or left unstirred. Constant stirring over hot water keeps the heat even so the sauce thickens smoothly.
Swap the brussels sprouts
How well each one fits the dish's main ingredients (sauce, mustard, egg, olive, vinegar, onion, butter):
- Horseradishfits better
- Chivefits better
- Shallotfits better
- Brussels sproutsthe original
Fit is the average pairing score against sauce, mustard, egg, olive, vinegar, onion, butter. 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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