Why it works: Butter and bread match in chemistry and in kitchens. They rank in the top 3% of all ingredient pairs, and 27,145 recipes mention both. Both carry delta-decalactone, 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)
Also mentioned in the method: fish, snapper
Directions
Make the tomato mixture
Stew tomatoes until soft enough to strain easily, and add soda to the tomatoes when ready to blend the two mixtures together.
Make the white sauce
Heat the milk in a double boiler, and blend in the cornstarch, making a white sauce.
Beat in the butter.
Combine and serve
Add the soda to the tomatoes, and when effervescence ceases add the tomato mixture to the white sauce.
Strain and serve.
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. See the original page.
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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 + breadtop 3% of all pairsAroma overlapstrongMentioned together27,145 recipes
Shared aroma: delta-decalactone (sweet, creamy).
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Butter + milktop 3% of all pairsAroma overlapstrongMentioned together81,222 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Milk + breadtop 4% of all pairsAroma overlapstrongMentioned together11,363 recipes
Shared aroma: 2-undecenal (sweet).
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Tomato + breadtop 4% of all pairsAroma overlapstrongMentioned together1,013 recipes
Shared aroma: 2-nonenal (fatty, green).
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Tomato + parsleytop 5% of all pairsAroma overlapstrongMentioned together5,396 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Tomatoes
- Supply the main body and acidity of the soup once stewed and strained.
- Cornstarch
- Thickens the hot milk into a smooth white sauce as its starch swells with heat.
- Milk
- Forms the creamy liquid base of the white sauce.
- Butter
- Adds fat for a smoother, richer mouthfeel and flavor.
The step that matters
Adding the tomato mixture to the white sauce. Tomatoes are acidic, and acid can curdle hot milk. Letting the soda reaction finish first reduces the acidity, and the mixture should be added gradually and kept from boiling hard to keep it smooth.
Flavor stand-ins for the parsley
How well each one fits the dish's main ingredients (tomato, butter, milk, bread):
- Cinnamonbetter flavor fit
- Thymeabout as good a flavor fit
- Celeryabout as good a flavor fit
- Parsleythe original
Fit is the average pairing score against tomato, butter, milk, bread. 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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