Why it works: Mushroom and beef are a kitchen classic. They rank in the top 4% of all ingredient pairs, and cooks put them together in 3,232 recipes. Both carry 2,4-nonadienal, which smells fatty, green. The science ↓
Mushroom-toast, or Croute Aux Champignons
Ingredients
Directions
Prepare
Cut the stems closely from the mushrooms and peel them, removing the fur.
Make the mushrooms
Melt the butter in a well-tinned saucepan over low heat.
Add the mushrooms, sprinkle with mace and cayenne, and stew for 10 to 15 minutes, stirring often.
Add the flour and shake the pan until lightly browned.
Gradually pour in the gravy or beef broth and let the mushrooms stew for a couple of 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 their aromas overlap, and how often cooks already put them together.
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Mushroom + beeftop 4% of all pairsSmell alikemoderateCooked together3,232 recipes
Shared aroma: 2,4-nonadienal (fatty, green).
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Mushroom + buttertop 7% of all pairsSmell alikemoderateCooked together12,525 recipes
Shared aroma: trans-2-decenal (waxy, orange).
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Pepper + beeftop 10% of all pairsSmell alikemoderateCooked together18,971 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Mushroom + peppertop 11% of all pairsSmell alikemoderateCooked together13,580 recipes
Shared aroma: 2-nonenal (fatty, green).
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Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
Butter and flour barely smell alike, yet cooks put them together in 124,287 recipes: they work on texture and structure more than aroma.
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Mushrooms
- Form the main body of the dish and release moisture that becomes part of the sauce as they stew.
- Butter
- Carries the mushroom flavour and helps the mushrooms brown gently in the pan.
- Flour
- Lightly browned in the fat, it thickens the liquid into a smooth sauce.
- Gravy or beef broth
- Forms the savoury liquid that the mushrooms stew in, adding body and meaty flavour.
The step that matters
Shake the pan until the flour is lightly browned. Flour cooked in butter must be stirred or shaken constantly so it toasts evenly without scorching. Browned flour gives a nutty flavour and thickens the sauce better than raw flour would.
Swap the mace
How well each one fits the dish's main ingredients (mushroom, butter, pepper, flour, beef):
- Thymefits better
- Parsleyfits better
- Marjoramfits better
- Macethe original
Fit is the average pairing score against mushroom, butter, pepper, flour, beef. 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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