Why it works: Butter and egg 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
serves 6Ingredients
Contains: egg, milk (auto-detected from the ingredients and method; we can miss things, so check labels)
Directions
Make the sauce
In a skillet, fry the onion with parsley, thyme, bay leaf, and garlic in butter until softened.
Add stock and red wine or cider; cook gently until well blended.
Poach and serve
In a separate pot, poach the eggs in a mixture of vinegar and water.
Drain the poached eggs and place them on pieces of toast that have been briefly soaked in hot water.
Strain the sauce, season with salt and pepper, and pour it around the eggs.
Garnish with fresh parsley before serving.
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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Butter + eggtop 8% of all pairsAroma overlapstrongMentioned together118,511 recipes
Shared aroma: nonanal (fat, citrus).
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Parsley + thymetop 1% of all pairsAroma overlapstrongMentioned together9,057 recipes
Shared aroma: cuminaldehyde (Spicy, cumin).
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Onion + garlictop 1% of all pairsAroma overlapstrongMentioned together29,030 recipes
Shared aroma: furaneol (caramel, strawberry).
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Parsley + garlictop 4% of all pairsAroma overlapmoderateMentioned together9,294 recipes
Shared aroma: beta-phellandrene (minty, terpene).
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Thyme + red winetop 4% of all pairsAroma overlapmoderateMentioned together749 recipes
Shared aroma: 1-octen-3-ol (mushroom, earthy).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Eggs
- Provide the main structure and body of the dish as they set in the poaching liquid.
- Butter
- Adds richness and carries the aromatics as they soften in the skillet.
- Red wine or cider
- Adds acidity and depth of flavour to the sauce as it reduces gently.
- Stock
- Forms the liquid base of the sauce and adds savoury flavour.
- Onion
- Adds sweetness and savoury depth as it softens in butter.
The step that matters
Poach the eggs in vinegar and water. Vinegar lowers the pH of the poaching water, which helps the egg whites coagulate quickly and hold a neat shape around the yolk.
Flavor stand-ins for the garlic
The recipe marks garlic as optional. How well each one fits the dish's main ingredients (onion, parsley, thyme, butter, red wine, egg, vinegar):
- Marjoramabout as good a flavor fit
- Tarragonabout as good a flavor fit
- Rosemaryabout as good a flavor fit
- Garlicthe original
Fit is the average pairing score against onion, parsley, thyme, butter, red wine, egg, vinegar. 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).
“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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