Why it works: Tomato and mushroom are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 2,719 recipes. Both carry 1-octen-3-one, which smells mushroom, metallic. The science ↓
Sharp Sauce
Ingredients
Directions
In a saucepan, heat the salad oil over medium heat.
Add the finely chopped onion, tomato, and mushrooms; cook until browned.
Stir in the flour and let it brown as well.
Pour in the water or vegetable stock and stir until it boils.
Add the vinegar and sweet herbs; simmer for a few minutes.
Strain the sauce and serve.
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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Tomato + mushroomtop 7% of all pairsSmell alikemoderateCooked together2,719 recipes
Shared aroma: 1-octen-3-one (mushroom, metallic).
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Pepper + nutmegtop 7% of all pairsSmell alikestrongCooked together13,015 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
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Tomato + peppertop 7% of all pairsSmell alikemoderateCooked together17,923 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Onion + tomatotop 8% of all pairsSmell alikemoderateCooked together20,633 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Flour + nutmegtop 8% of all pairsSmell alikemoderateCooked together18,623 recipes
Shared aroma: isobutyraldehyde (malty, green).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Flour
- Thickens the sauce as it cooks and browns, adding body and a toasted flavour.
- Onion
- Browns in the oil to add savoury sweetness and depth of flavour.
- Mushrooms
- Browning releases savoury flavour that adds richness to the sauce.
- Vinegar
- Adds acidity that gives the sauce its sharp taste.
The step that matters
Browning the flour. Flour must be stirred and cooked until it turns golden, which cooks out its raw taste and builds color and flavour. Adding liquid too soon leaves lumps and a pale, floury sauce.
Swap the nutmeg
How well each one fits the dish's main ingredients (onion, tomato, mushroom, flour, vinegar, pepper):
- Garlicfits better
- Thymefits better
- Tarragonfits better
- Nutmegthe original
Fit is the average pairing score against onion, tomato, mushroom, flour, vinegar, pepper. 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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