Why it works: Bread and butter 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 (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
Cut rounds of bread about the size of a coin, ¼ inch thick.
Fry the bread in a little hot butter or lard until golden, then drain.
Assemble and bake
Place a thick slice of tomato on each round of bread.
Top with a thick layer of grated Parmesan cheese mixed with a small amount of cream.
Bake in a moderate oven at 350°F (175°C) until brown.
Serve
Serve on a napkin.
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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Bread + buttertop 3% of all pairsAroma overlapstrongMentioned together27,145 recipes
Shared aroma: delta-decalactone (sweet, creamy).
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Tomato + parmesan cheesetop 3% of all pairsAroma overlapstrongMentioned together2,490 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
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Butter + parmesan cheesetop 3% of all pairsAroma overlapstrongMentioned together4,158 recipes
Shared aroma: guaiacol (smoky, sweet).
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Butter + creamtop 3% of all pairsAroma overlapstrongMentioned together41,494 recipes
Shared aroma: delta-dodecalactone (sweet, creamy).
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Bread + tomatotop 4% of all pairsAroma overlapstrongMentioned together1,013 recipes
Shared aroma: 2-nonenal (fatty, green).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Bread
- Forms the crisp base that holds the tomato and cheese topping.
- Tomato
- Adds moisture and acidity that contrasts with the rich cheese.
- Parmesan cheese
- Melts and browns in the oven to form the savory topping.
- Cream
- Loosens the cheese so it spreads evenly and bakes softer.
- Butter or lard
- Fries the bread, adding fat for golden colour and flavour.
The step that matters
Bake until brown. Baking long enough lets the cheese melt and brown fully, while stopping early leaves it pale and soft. Overbaking can dry the cheese and harden the topping, so watch the colour rather than the clock.
Flavor stand-ins for the tomato
How well each one fits the dish's main ingredients (bread, butter, parmesan cheese, cream):
- Potatoabout as good a flavor fit
- Tomatothe original
- Asparagusabout as good a flavor fit
- Onionabout as good a flavor fit
Fit is the average pairing score against bread, butter, parmesan cheese, cream. 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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