Why it works: Cabbage and onion match in chemistry and in kitchens. They rank in the top 7% of all ingredient pairs, and cooks put them together in 3,001 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
A Red Cabbage Relish
Ingredients
Directions
Combine sliced cabbage and onion in a stewpan.
Add vinegar and simmer for 4 to 5 hours, stirring frequently.
Stir in flour and butter before serving.
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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Cabbage + oniontop 7% of all pairsSmell alikestrongCooked together3,001 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Flour + buttertop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Cabbage + vinegartop 13% of all pairsSmell alikemoderateCooked together2,924 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
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Onion + vinegartop 14% of all pairsSmell alikemoderateCooked together18,226 recipes
Shared aroma: acetic acid (sour, vinegar).
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Onion + buttertop 15% of all pairsSmell alikemoderateCooked together42,912 recipes
Shared aroma: decanal (soap, orange peel).
Flour and butter barely smell alike, yet cooks put them together in 124,287 recipes: they work on texture and structure more than aroma.
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Red cabbage
- Forms the bulk of the relish and gives its colour and body as it softens.
- Vinegar
- Adds acidity that balances sweetness and helps keep the cabbage's colour bright.
- Flour
- Thickens the cooking liquid so the relish becomes less watery.
- Butter
- Adds fat and richness, giving the relish a smoother, rounder mouthfeel.
The step that matters
Simmering the cabbage with vinegar. A long, gentle simmer with frequent stirring softens the cabbage evenly and keeps it from scorching on the base of the pan. Stirring also helps the liquid reduce into a thick, cohesive relish.
Swap the cabbage
How well each one fits the dish's main ingredients (onion, vinegar, flour, butter):
- Shallotfits better
- Chivefits better
- Mustardfits better
- Cabbagethe original
Fit is the average pairing score against onion, vinegar, flour, 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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