Why it works: Parsley and pepper match in chemistry and in kitchens. They rank in the top 2% of all ingredient pairs, and 34,122 recipes mention both. Both carry 4'-methylacetophenone, which smells bitter almond. The science ↓
Plain Tomato Sauce
Ingredients
Directions
Prepare
Cut the tomatoes into quarters and place them in a saucepan.
Add the parsley, green onions, leek, bay leaf, cloves, and peppercorns.
Cook and strain
Cover the saucepan and cook over medium heat until the tomatoes are thoroughly soft.
Remove the herb bundle and strain the tomatoes through a fine sieve.
Reduce and finish
Return the puree to a flat saucepan and reduce it over medium heat to the desired consistency.
Season with salt and pepper, then stir in a piece of butter before serving.
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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Parsley + peppertop 2% of all pairsAroma overlapstrongMentioned together34,122 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
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Onion + leektop 4% of all pairsAroma overlapstrongMentioned together1,326 recipes
Shared aroma: ethyl butyrate (apple, fruity).
-
Parsley + leektop 4% of all pairsAroma overlapstrongMentioned together759 recipes
Shared aroma: trans-2-hexenal (green, leafy).
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Clove + peppertop 5% of all pairsAroma overlapstrongMentioned together17,451 recipes
Shared aroma: ethyl octanoate (fruity, wine).
-
Leek + clovetop 6% of all pairsAroma overlapstrongMentioned together579 recipes
Shared aroma: 2-nonanone (fruity, floral).
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 flavour of the sauce, softening into a puree when cooked.
- Butter
- Adds richness and a smooth, rounded mouthfeel to the finished sauce.
The step that matters
Reducing the puree to the desired consistency. Tomato puree thickens gradually as water evaporates over medium heat. Stopping too early leaves it thin, while over-reducing can make it pasty or scorch on the base of the pan, so it needs regular stirring and checking.
Flavor stand-ins for the clove
How well each one fits the dish's main ingredients (tomato, parsley, onion, leek, pepper, butter):
- Thymebetter flavor fit
- Garlicbetter flavor fit
- Celerybetter flavor fit
- Clovethe original
Fit is the average pairing score against tomato, parsley, onion, leek, pepper, 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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