Why it works: Parsley and pepper match in chemistry and in kitchens. They rank in the top 2% of all ingredient pairs, and cooks put them together in 34,122 recipes. Both carry 4'-methylacetophenone, which smells bitter almond. The science ↓
Tomato Sauce
Ingredients
Directions
Make the tomato base
Stew the tomatoes with cloves, parsley, pepper, and salt for 30 minutes.
Press the mixture through a sieve.
Finish the sauce
In a saucepan, melt the butter over medium heat until it bubbles.
Add the flour and cook, stirring, until well mixed.
Stir in the tomato pulp until smooth.
If desired, add stock and onion slices for extra flavor.
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 their aromas overlap, and how often cooks already put them together.
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Parsley + peppertop 2% of all pairsSmell alikestrongCooked together34,122 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
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Clove + peppertop 5% of all pairsSmell alikestrongCooked together17,451 recipes
Shared aroma: ethyl octanoate (fruity, wine).
-
Clove + parsleytop 6% of all pairsSmell alikestrongCooked together6,768 recipes
Shared aroma: cuminaldehyde (Spicy, cumin).
-
Tomato + peppertop 7% of all pairsSmell alikemoderateCooked together17,923 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Tomato + oniontop 8% of all pairsSmell alikemoderateCooked together20,633 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, flavor, and pulp that forms the sauce.
- Butter
- Adds richness and fat that carries flavor in the sauce.
- Flour
- Thickens the sauce as it cooks with the butter, giving it body.
The step that matters
Cooking the butter and flour together. The flour must cook in the melted butter until well mixed so it thickens smoothly and loses its raw taste. Adding the tomato pulp before this roux is fully combined can leave lumps and a floury flavor.
Swap the onion
The recipe marks onion as optional. How well each one fits the dish's main ingredients (tomato, clove, parsley, pepper, butter, flour):
- Carrotfits better
- Capsicumfits better
- Shallotfits better
- Onionthe original
Fit is the average pairing score against tomato, clove, parsley, pepper, butter, flour. Candidates are from the same food group and used in at least 100 recipes.
“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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