Why it works: Onion and garlic match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and 29,058 recipes mention both. Both carry furaneol, which smells caramel, strawberry. The science ↓
Tomato Sauce
Ingredients
Directions
Simmer the tomatoes, onion, salt, pepper, and garlic together for 10 minutes.
Rub the mixture through a sieve.
In a separate pan, cook the flour and butter together for 1 minute.
Gradually add the tomato mixture, stirring until smooth.
Simmer for an additional 5 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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Onion + garlictop 1% of all pairsAroma overlapstrongMentioned together29,058 recipes
Shared aroma: furaneol (caramel, strawberry).
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Tomato + garlictop 3% of all pairsAroma overlapmoderateMentioned together14,076 recipes
Shared aroma: furaneol (caramel, strawberry).
-
Pepper + clovetop 5% of all pairsAroma overlapstrongMentioned together17,451 recipes
Shared aroma: ethyl octanoate (fruity, wine).
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Tomato + peppertop 7% of all pairsAroma overlapmoderateMentioned together17,923 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Pepper + garlictop 8% of all pairsAroma overlapmoderateMentioned together27,090 recipes
Shared aroma: beta-phellandrene (minty, terpene).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Tomatoes
- Form the body and bulk of the sauce, providing the main flavor and liquid.
- Flour
- Thickens the sauce as it cooks with the butter, giving it a smooth, body-rich texture.
- Butter
- Cooks with the flour to form a roux that helps thicken the sauce and adds richness.
- Onion
- Adds aromatic sweetness and savory depth as it softens into the tomatoes.
The step that matters
Adding the tomato mixture to the roux. Pour the tomato mixture in gradually while stirring. Adding it all at once can leave lumps of flour that do not dissolve, so the sauce will not turn smooth.
Flavor stand-ins for the clove
How well each one fits the dish's main ingredients (tomato, onion, pepper, garlic, flour, butter):
- Thymebetter flavor fit
- Cuminbetter flavor fit
- Parsleybetter flavor fit
- Clovethe original
Fit is the average pairing score against tomato, onion, pepper, garlic, 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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