Why it works: Parsley and celery match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and 6,810 recipes mention both. Both carry 4'-methylacetophenone, which smells bitter almond. The science ↓
Tomato Sauce
Ingredients
Directions
Make the tomato base
In a saucepan, combine tomatoes, parsley, bay leaf, celery, onion, and cloves.
Simmer for 20 minutes.
Press the mixture through a sieve.
Thicken and season
Melt the butter in a separate pan without browning it.
Add the flour to the melted butter and stir until smooth.
Gradually add the strained tomato juice, cooking and stirring gently until it thickens.
Season with salt and pepper to taste.
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 + celerytop 1% of all pairsAroma overlapstrongMentioned together6,810 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Parsley + peppertop 2% of all pairsAroma overlapstrongMentioned together34,122 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Tomato + celerytop 4% of all pairsAroma overlapmoderateMentioned together3,377 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Clove + peppertop 5% of all pairsAroma overlapstrongMentioned together17,451 recipes
Shared aroma: ethyl octanoate (fruity, wine).
-
Celery + peppertop 5% of all pairsAroma overlapstrongMentioned together16,012 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
- Provide the main body, acidity and flavor of the sauce.
- Butter
- Carries flavor and enriches the sauce while forming the roux base.
- Flour
- Thickens the sauce as a roux with the melted butter.
The step that matters
Add the strained tomato juice gradually to the roux. Flour must be fully mixed into the melted butter first, then liquid added slowly while stirring, so no lumps form and the sauce thickens smoothly. Gentle cooking keeps the starch from scorching and the sauce from sticking.
Flavor stand-ins for the onion
How well each one fits the dish's main ingredients (tomato, parsley, celery, clove, butter, flour, pepper):
- Carrotbetter flavor fit
- Okrabetter flavor fit
- Capsicumbetter flavor fit
- Onionthe original
Fit is the average pairing score against tomato, parsley, celery, clove, butter, flour, pepper. 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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