Why it works: Onion and mustard 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 ↓
Mustard Pickles
Ingredients
Directions
Prepare
Scald the onions.
Make the pickles
Mix pickles, onions, mustard, sugar, and enough vinegar to cover pickles.
Heat the mixture slowly on the back of the stove for 1 hour.
Add the tied mixed spices.
Seal while hot.
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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Onion + mustardtop 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).
-
Onion + vinegartop 14% of all pairsSmell alikemoderateCooked together18,226 recipes
Shared aroma: acetic acid (sour, vinegar).
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Sugar + vinegartop 15% of all pairsSmell alikemoderateCooked together20,806 recipes
Shared aroma: beta-damascenone (apple, rose).
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Mustard + sugartop 19% of all pairsSmell alikemoderateCooked together8,424 recipes
Shared aroma: guaiacol (smoky, sweet).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Pickles
- Form the bulk of the dish and supply the main pickled texture.
- Mixed mustard
- Provides the sharp, pungent flavour that defines the pickle.
- Vinegar
- Acidity that preserves the pickles and sharpens the overall flavour.
- Sugar
- Balances the sharpness of the vinegar and mustard with sweetness.
The step that matters
Heating slowly on the back of the stove. Gentle, prolonged heat softens the onions and pickles and lets the vinegar and spices blend without boiling the vegetables to mush or scorching the sugar.
Swap the onion
How well each one fits the dish's main ingredients (mustard, sugar, vinegar):
- Horseradishfits better
- Radishfits better
- Shallotfits better
- Onionthe original
Fit is the average pairing score against mustard, sugar, 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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