Why it works: Butter and parsley are a kitchen classic. They rank in the top 15% of all ingredient pairs, and cooks put them together in 28,563 recipes. Both carry trans-2-hexenal, which smells green, leafy. The science ↓
Cupped Eggs
Ingredients
Directions
Prepare
Butter the required number of egg cups.
Carefully break a fresh egg into each cup.
Cook and serve
Set the cups in a strainer over boiling water.
Cook until the whites are turned and set.
Drop a bit of sweet, fresh butter on top of each egg.
Shake a pinch of minced parsley over the butter.
Serve immediately.
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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Butter + parsleytop 15% of all pairsSmell alikemoderateCooked together28,563 recipes
Shared aroma: trans-2-hexenal (green, leafy).
-
Egg + buttertop 17% of all pairsSmell alikemoderateCooked together118,967 recipes
Shared aroma: decanal (soap, orange peel).
-
Egg + parsleytop 21% of all pairsSmell alikemoderateCooked together18,765 recipes
Shared aroma: 2,4-decadienal (seaweed).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Fresh eggs
- Whites set around the yolk to form the cupped egg's firm, tender body.
- Butter
- Adds richness and a smooth fat layer that carries flavour across the top of the egg.
- Minced parsley
- Adds a fresh, herbal aroma and a light green note that contrasts with the rich egg.
The step that matters
Cook until the whites are turned and set. Egg whites set between about 60 and 70 degrees C, while yolks thicken at higher temperatures. Gentle steam heat over boiling water sets the white evenly without overcooking the yolk. Lifting the cups too early leaves the white runny; cooking too long makes the yolk chalky and rubbery.
Swap the parsley
How well each one fits the dish's main ingredients (egg, butter):
- Nutmegfits about as well
- Parsleythe original
- Capersfits about as well
- Tarragonfits less well
Fit is the average pairing score against egg, 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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