Why it works: Parsley and thyme match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and 9,057 recipes mention both. Both carry cuminaldehyde, which smells Spicy, cumin. The science ↓
The recipe
Ingredients
Contains: egg, milk, wheat, fish (auto-detected from the ingredients and method; we can miss things, so check labels)
Also mentioned in the method: fish
Directions
The book says “a moderate oven”. The 350°F (175°C) in the steps is the modern equivalent, not the book's own figure.
Prepare the fish
Boil the whitefish until cooked.
Remove all bones and shred the fish finely.
Make the sauce
In a pot, bring the milk, onion, and parsley to a boil.
Stir in the flour and egg yolks.
Season with white pepper, thyme, and salt.
Assemble and bake
In a baking pan, layer the sauce and fish alternately, finishing with sauce on top.
Sprinkle with cracker crumbs and a light grating of cheese.
Bake at 350°F (175°C) for one hour.
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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Parsley + thymetop 1% of all pairsAroma overlapstrongMentioned together9,057 recipes
Shared aroma: cuminaldehyde (Spicy, cumin).
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Onion + thymetop 5% of all pairsAroma overlapmoderateMentioned together11,172 recipes
Shared aroma: coumarin (sweet, hay).
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Parsley + white peppertop 5% of all pairsAroma overlapmoderateMentioned together1,451 recipes
Shared aroma: myrcene (balsamic, herbaceous).
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White pepper + thymetop 6% of all pairsAroma overlapmoderateMentioned together443 recipes
Shared aroma: eucalyptol (eucalyptus, herbal).
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Onion + parsleytop 6% of all pairsAroma overlapstrongMentioned together25,834 recipes
Shared aroma: coumarin (sweet, hay).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Whitefish
- Forms the bulk of the dish and gives it its main flavor and body.
- Milk
- Forms the liquid base of the sauce, giving it creaminess and body.
- Flour
- Thickens the milk into a smooth sauce that holds the fish together.
- Egg yolks
- Enrich the sauce and help it set firm and smooth in the oven.
- Cheese
- Melts and browns on top, adding savory flavor and a golden crust.
The step that matters
Stirring the flour and egg yolks into the sauce. Egg yolks can curdle or scramble if the sauce is too hot when they are added, leaving a grainy texture. Adding them off the heat or after the sauce cools slightly, while stirring steadily, keeps the sauce smooth and creamy.
Flavor stand-ins for the white pepper
How well each one fits the dish's main ingredients (whitefish, milk, onion, parsley, flour, egg, thyme):
- Dillbetter flavor fit
- Celerybetter flavor fit
- Marjorambetter flavor fit
- White pepperthe original
Fit is the average pairing score against whitefish, milk, onion, parsley, flour, egg, thyme. 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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