Why it works: Egg and butter are a kitchen classic. They rank in the top 17% of all ingredient pairs, and cooks put them together in 118,967 recipes. Both carry decanal, which smells soap, orange peel. The science ↓
Boiled Eggs
Ingredients
Directions
Cook the eggs
Place eggs in a covered vessel of cold water.
Bring the water to a boil; cook for 5 minutes for soft-boiled eggs.
For hard-boiled eggs, cook for 30 to 45 minutes.
Serve
Remove the large end of the shell and add a small piece of the white for seasoning.
Serve in an egg cup with salt, pepper, and butter.
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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Egg + buttertop 17% of all pairsSmell alikemoderateCooked together118,967 recipes
Shared aroma: decanal (soap, orange peel).
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Pepper + buttertop 21% of all pairsSmell alikemoderateCooked together85,593 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
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Egg + peppertop 33% of all pairsSmell alikelowCooked together50,580 recipes
Shared aroma: 2-nonenal (fatty, green).
Egg and pepper barely smell alike, yet cooks put them together in 50,580 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
- Fresh eggs
- Provide the main body of the dish; the white and yolk set when heated.
- Butter
- Adds richness and fat to the cooked egg.
The step that matters
Timing the boil. Egg whites and yolks set at different temperatures as they heat, so cooking time determines whether the yolk stays soft or turns firm. Small changes in minutes noticeably change the result.
“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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