Why it works: Cream and butter match in chemistry and in kitchens. They rank in the top 3% of all ingredient pairs, and 41,494 recipes mention both. Both carry delta-dodecalactone, which smells sweet, creamy. The science ↓
The recipe
Ingredients
Contains: milk, wheat, fish (auto-detected from the ingredients and method; we can miss things, so check labels)
Directions
The book gives no oven temperature. The 350°F (175°C) in the steps was added when the recipe was transcribed, as a starting point.
Prepare the fish
Boil the fish, remove the bones, and break it into small pieces.
Make the sauce
In a saucepan, mix the cream, flour, onion, and butter.
Cook over medium heat, stirring until thickened like custard.
Bake and serve
In a baking dish, layer the fish and pounded crackers alternately.
Bake at 350°F (175°C) for 30 minutes.
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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Cream + buttertop 3% of all pairsAroma overlapstrongMentioned together41,494 recipes
Shared aroma: delta-dodecalactone (sweet, creamy).
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Fish + buttertop 5% of all pairsAroma overlapstrongMentioned together4,432 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Flour + buttertop 6% of all pairsAroma overlaplowMentioned together122,858 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Onion + buttertop 7% of all pairsAroma overlapmoderateMentioned together42,827 recipes
Shared aroma: guaiacol (smoky, sweet).
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Fish + oniontop 9% of all pairsAroma overlapmoderateMentioned together1,919 recipes
Shared aroma: 2-nonanone (fruity, floral).
Flour and butter share little aroma chemistry, yet 122,858 recipes mention both: they likely 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
- Fish
- Forms the main body of the dish and provides its substance.
- Cream
- Adds moisture and richness, helping the sauce become smooth and custard-like.
- Flour
- Thickens the sauce so it sets into a custard-like texture.
- Butter
- Adds fat and richness, carrying flavour through the sauce.
- Pounded crackers
- Adds crisp texture and absorbs some moisture as the dish bakes.
The step that matters
Cook the sauce until thickened. Flour thickens only when heated enough with liquid, so the sauce must reach a custard-like thickness before layering. Undercooked flour leaves the sauce thin and gives a raw starchy taste, while overcooking can cause sticking or scorching on the base of the pan.
Flavor stand-ins for the onion
How well each one fits the dish's main ingredients (fish, cream, flour, butter):
- Potatobetter flavor fit
- Leekabout as good a flavor fit
- Asparagusabout as good a flavor fit
- Onionthe original
Fit is the average pairing score against fish, cream, flour, butter. 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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