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 Pie
Ingredients
Directions
The book says “a very moderate oven”. The 350°F (175°C) in the steps is the modern equivalent, not the book's own figure.
Prepare
Cut the mutton into 1-inch pieces and chop through the bones.
Assemble
Layer the meat in a pie dish, followed by a layer of potatoes, then chopped onion and seasoning.
Repeat the layers until the dish is full.
Pour in the milk and cover with the pie crust.
Bake
Bake at 350°F (175°C) for 1 hour and 15 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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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).
-
Onion + peppertop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Mutton + peppertop 16% of all pairsSmell alikelowCooked together5,442 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Mutton
- Provides the rich meat flavour and fat that fills the pie.
- Potatoes
- Bulk the filling and soften into a starchy, tender layer as they cook.
- Short crust
- Forms the enclosing pastry that seals in the filling while it bakes.
- Milk
- Adds moisture and richness, helping the filling turn creamy as it cooks.
The step that matters
Pouring in the milk before the crust. The milk must reach the layers before the pastry seals the dish, so the filling cooks through in a moist, even way rather than drying out or staying watery at the base.
Swap the onion
How well each one fits the dish's main ingredients (mutton, potato, milk, pepper):
- Capsicumfits better
- Carrotfits better
- Tomatofits better
- Onionthe original
Fit is the average pairing score against mutton, potato, milk, 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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