Why it works: Potato and onion are a kitchen classic. They rank in the top 3% of all ingredient pairs, and cooks put them together in 9,023 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Potato and Mutton Pie
Ingredients
Directions
The book says “a quick oven”. The 400°F (200°C) in the steps is the modern equivalent, not the book's own figure.
Prepare the filling
Turn out the mutton and remove the fat.
Boil the potatoes, then mash them with butter, milk, and seasoning.
Slice the onions and fry them in the fat from the mutton.
Butter a deep pie dish and line it with mashed potatoes.
Add the sliced mutton mixed with onions and season well.
Assemble and bake
Cover with a thick layer of mashed potatoes.
Sprinkle breadcrumbs on top and dot with small pieces of butter.
Bake in a 400°F (200°C) oven for 20 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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Potato + oniontop 3% of all pairsSmell alikemoderateCooked together9,023 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Butter + breadtop 7% of all pairsSmell alikemoderateCooked together27,232 recipes
Shared aroma: delta-decalactone (sweet, creamy).
-
Butter + milktop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Potato + peppertop 9% of all pairsSmell alikemoderateCooked together8,305 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Potato + milktop 9% of all pairsSmell alikemoderateCooked together3,611 recipes
Shared aroma: (e,z)-2,6-nonadienal (cucumber, melon).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Roast mutton
- Forms the savory meat filling and carries the flavor of the pie.
- Potatoes
- Form the mashed base and top layer, giving a soft, moist, structured crust.
- Butter
- Adds richness and moisture to the mashed potatoes and melts over the top for browning.
- Onions
- Frying softens and sweetens them, adding depth to the meat filling.
- Milk
- Loosens the mashed potatoes so they spread smoothly and stay moist.
The step that matters
Cover with a thick layer of mashed potatoes. A thick, evenly spread potato layer seals the filling so it stays moist during baking, and its surface browns as the butter and starch heat.
Swap the onion
How well each one fits the dish's main ingredients (mutton, potato, butter, sauce, milk, bread, pepper):
- Tomatofits better
- Capsicumfits better
- Asparagusfits about as well
- Onionthe original
Fit is the average pairing score against mutton, potato, butter, sauce, milk, bread, 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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