Why it works: Onion and butter are a kitchen classic. They rank in the top 15% of all ingredient pairs, and cooks put them together in 42,912 recipes. Both carry decanal, which smells soap, orange peel. The science ↓
Fried Onions
Ingredients
Directions
Chop onions very finely in a wooden bowl.
Heat butter and oil in a pan.
Fry onions until light brown.
Pour fried onions over steak or mix with potatoes.
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 + buttertop 15% of all pairsSmell alikemoderateCooked together42,912 recipes
Shared aroma: decanal (soap, orange peel).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Onions
- Provide the main flavour and sweetness as they caramelise and brown in the fat.
- Butter
- Adds richness and aroma, and helps the onions brown in the pan.
- Oil
- Raises the frying temperature and keeps the butter from burning too quickly.
The step that matters
Fry onions until light brown. Onions need steady, moderate heat and time to brown. Pushing the heat too high can scorch the outside while the inside stays raw and bitter, so stop when they are evenly light brown.
“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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