Why it works: Onion and vinegar are a kitchen classic. They rank in the top 14% of all ingredient pairs, and cooks put them together in 18,226 recipes. Both carry acetic acid, which smells sour, vinegar. The science ↓
Pickled Onions
Ingredients
Directions
Prepare
Peel and slice the onions.
Place the onions in a jar.
Cover the onions with vinegar.
Add spices to taste.
Rest
Seal the jar and let it sit for at least a week before using.
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 + vinegartop 14% of all pairsSmell alikemoderateCooked together18,226 recipes
Shared aroma: acetic acid (sour, vinegar).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Onions
- Main ingredient; they soften and take on the sharp, tangy flavour of the vinegar as they pickle.
- Vinegar
- Acidity that preserves the onions and gives them their sour, tangy character.
The step that matters
Covering the onions fully with vinegar. Onions left exposed above the liquid can spoil and discolour. Keeping every slice submerged lets the acid preserve them evenly while the flavour develops over the resting week.
“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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