Why it works: Egg and butter match in chemistry and in kitchens. They rank in the top 8% of all ingredient pairs, and 118,511 recipes mention both. Both carry nonanal, which smells fat, citrus. The science ↓
The recipe
Ingredients
Contains: egg, milk (auto-detected from the ingredients and method; we can miss things, so check labels)
Directions
Beat the eggs well in a stewpan.
Add butter, cream, pepper, salt, and sugar to the eggs.
Stir in boiled vegetables, chopped parsley, and herbs.
Substitute tarragon, shallot, fennel, truffle, or celery if desired.
Serve the mixture on hot toast.
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 aroma chemistry they share, and how many recipes mention both.
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Egg + buttertop 8% of all pairsAroma overlapstrongMentioned together118,511 recipes
Shared aroma: nonanal (fat, citrus).
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Parsley + tarragontop 2% of all pairsAroma overlapstrongMentioned together1,259 recipes
Shared aroma: estragole (anise, licorice).
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Pepper + parsleytop 2% of all pairsAroma overlapstrongMentioned together34,118 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
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Pepper + tarragontop 3% of all pairsAroma overlapstrongMentioned together1,691 recipes
Shared aroma: estragole (anise, licorice).
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Butter + creamtop 3% of all pairsAroma overlapstrongMentioned together41,494 recipes
Shared aroma: delta-dodecalactone (sweet, creamy).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
Flavor stand-ins for the tarragon
The recipe marks tarragon as optional. How well each one fits the dish's main ingredients (egg, butter, cream, pepper, sugar, peas, parsley):
- Nutmegabout as good a flavor fit
- Tarragonthe original
- Celeryabout as good a flavor fit
- Thymeabout as good a flavor fit
Fit is the average pairing score against egg, butter, cream, pepper, sugar, peas, parsley. Candidates are from the same food group and used in at least 100 recipes. This compares flavor only: it does not check the job the ingredient does in the dish (bulk, moisture, acidity, structure).
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