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
6-8 servingsIngredients
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 400°F (200°C) in the steps was added when the recipe was transcribed, as a starting point.
Prepare
If using fresh tomatoes, peel and cut them into large pieces.
In a large shallow stew pan, combine the tomatoes, butter, and chopped onion.
Stew and season
Stew uncovered over medium heat for 2 hours, stirring occasionally to prevent scorching.
Season with salt, pepper, and sugar, then transfer to an earthenware bake-dish.
Bake and serve
Cover the top with bread crumbs and dots of butter.
Bake in a 400°F (200°C) oven for 1 hour or until well browned.
If any liquid remains, leave the dish in the oven with the door open until thickened.
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 + breadtop 3% of all pairsAroma overlapstrongMentioned together27,145 recipes
Shared aroma: delta-decalactone (sweet, creamy).
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Tomato + peppertop 4% of all pairsAroma overlapstrongMentioned together17,913 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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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 + oniontop 4% of all pairsAroma overlapstrongMentioned together20,622 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Onion + peppertop 6% of all pairsAroma overlapmoderateMentioned together68,463 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Tomatoes
- Provide the main body and acidic, juicy base that reduces into a thick sauce.
- Butter
- Adds richness and fat, helping the dish brown on top with the bread crumbs.
- Onion
- Adds savory aroma and depth as it softens into the stewed tomatoes.
- Bread crumbs
- Form a crisp, golden topping that browns in the oven.
The step that matters
Stewing uncovered and stirring. Uncovered stewing lets water evaporate so the tomatoes thicken rather than stay watery. Stirring prevents the sugars and solids on the bottom of the pan from scorching, which would give a bitter taste.
Flavor stand-ins for the onion
How well each one fits the dish's main ingredients (tomato, butter, pepper, sugar, bread):
- Capsicumbetter flavor fit
- Potatobetter flavor fit
- Carrotbetter flavor fit
- Onionthe original
Fit is the average pairing score against tomato, butter, pepper, sugar, 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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