Why it works: Mushroom and butter 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 ↓
A Nice Hash of Mutton
Ingredients
Directions
Combine cold gravy, chopped onion, and mushrooms in a saucepan.
Boil gently, then add the cold mutton pieces.
Thicken the gravy with flour and butter, stirring until smooth.
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 + buttertop 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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Flour + buttertop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Mushroom + muttontop 13% of all pairsSmell alikemoderateCooked together685 recipes
Shared aroma: 1-octen-3-ol (mushroom, earthy).
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Onion + buttertop 15% of all pairsSmell alikemoderateCooked together42,912 recipes
Shared aroma: decanal (soap, orange peel).
Flour and butter 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
- Mutton
- Provides the main meat and substance of the hash.
- Flour
- Thickens the gravy by swelling with liquid as it heats.
- Butter
- Adds richness and helps smooth the flour into the gravy.
- Mushrooms
- Add savoury, earthy flavour and a soft texture.
- Onion
- Adds savoury depth and aroma as it softens in the gravy.
The step that matters
Thicken the gravy with flour and butter. Adding flour without cooking it, or letting it sit undissolved, leaves lumps and a raw floury taste. Stirring as the mixture heats lets the starch swell evenly and thicken the gravy smoothly.
Swap the onion
How well each one fits the dish's main ingredients (mushroom, mutton, flour, butter):
- Shallotfits better
- Leekfits better
- Asparagusfits better
- Onionthe original
Fit is the average pairing score against mushroom, mutton, flour, butter. 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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