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 the mushrooms
Cut the stems from the mushrooms, peel them, and remove the gills.
Make the mushroom mixture
Melt the butter in a saucepan over low heat, then add the mushrooms.
Sprinkle the mushrooms with mace and cayenne, and stew for 10 to 15 minutes, stirring often.
Add the flour and stir until lightly browned.
Gradually pour in the gravy or broth, and let the mushrooms stew for 2 minutes.
Season with salt and lemon juice.
Fry the bread and serve
Fry the bread in butter until light brown, slightly hollowing it out first.
Serve the mushroom mixture on the toasted bread.
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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Butter + breadtop 7% of all pairsSmell alikemoderateCooked together27,232 recipes
Shared aroma: delta-decalactone (sweet, creamy).
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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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Mushroom + breadtop 10% of all pairsSmell alikemoderateCooked together2,536 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 cooks into the sauce as they stew.
- Butter
- Carries the heat and adds richness and browning to the mushrooms and the fried bread.
- Flour
- Thickens the cooking liquid into a light sauce once it is browned and mixed with the gravy or broth.
- Gravy or beef broth
- Supplies the liquid for the sauce and adds savoury, meaty flavour.
- Bread
- Provides a crisp, browned base that holds the mushroom mixture.
The step that matters
Adding the gravy or broth to the flour-thickened mushrooms. Pouring liquid in gradually while stirring keeps the flour dispersed so the sauce thickens smoothly instead of forming lumps. Adding it all at once makes lumps that are hard to remove.
Swap the mace
How well each one fits the dish's main ingredients (mushroom, butter, flour, beef, lemon, bread):
- Thymefits better
- Marjoramfits better
- Parsleyfits better
- Macethe original
Fit is the average pairing score against mushroom, butter, flour, beef, lemon, bread. 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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