Why it works: Butter and mushroom are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 12,525 recipes. Both carry trans-2-decenal, which smells waxy, orange. The science ↓
Hash, Horman
Ingredients
Directions
Make the sauce
Fry the onions in hot butter until rich brown.
Add flour and brown well.
Stir in stock and bring to a boil.
Add gravy, season with salt, pepper, lemon pickle, and mushroom ketchup.
Finish the hash
Layer the meat in the sauce, cover, and simmer for 30 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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Butter + mushroomtop 7% of all pairsSmell alikemoderateCooked together12,525 recipes
Shared aroma: trans-2-decenal (waxy, orange).
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Onion + mushroomtop 10% of all pairsSmell alikemoderateCooked together10,626 recipes
Shared aroma: 2,4-decadienal (seaweed).
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Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Flour + ketchuptop 13% of all pairsSmell alikemoderateCooked together2,435 recipes
Shared aroma: ethanol (alcoholic, ethereal).
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Meat + mushroomtop 15% of all pairsSmell alikemoderateCooked together1,423 recipes
Shared aroma: 1-octen-3-one (mushroom, metallic).
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
- Meat
- Provides the main body of the dish, becoming tender as it simmers slowly in the sauce.
- Butter
- Carries the heat that browns the onions and adds richness to the sauce.
- Flour
- Browned with the butter and onions, it thickens the stock into a sauce.
- Button onions
- Browned deeply in butter, they add sweetness and savoury depth to the sauce.
- Stock
- Forms the liquid base of the sauce and carries flavour through the dish.
The step that matters
Browning the onions and flour. Browning builds deep flavour through the Maillard reaction, but scorched onions or flour turn bitter. Cook until rich brown, not black, before adding liquid.
Swap the white pepper
How well each one fits the dish's main ingredients (meat, onion, butter, flour, lemon, mushroom, ketchup):
- Thymefits better
- Parsleyfits better
- Capersfits better
- White pepperthe original
Fit is the average pairing score against meat, onion, butter, flour, lemon, mushroom, ketchup. 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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