Why it works: Pepper and potato are a kitchen classic. They rank in the top 9% of all ingredient pairs, and cooks put them together in 8,305 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Fish Pie
Ingredients
Directions
The book gives no oven temperature. The 350°F (175°C) in the steps was added when the recipe was transcribed, as a starting point.
Prepare
Flake the fish and remove bones and skin.
Place the fish in a pie dish and season with pepper, coarse sea salt, and melted butter.
Cover the fish with a layer of smoothly mashed potatoes.
Optionally, brush the top with beaten egg yolk before baking.
Bake and brown
Heat the pie in a 350°F (175°C) oven until warmed through.
If the potatoes are not browned, use a salamander or broiler to brown the top.
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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Pepper + potatotop 9% of all pairsSmell alikemoderateCooked together8,305 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Fish + buttertop 12% of all pairsSmell alikemoderateCooked together4,488 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Butter + potatotop 13% of all pairsSmell alikemoderateCooked together6,456 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Fish + potatotop 15% of all pairsSmell alikemoderateCooked together134 recipes
Shared aroma: (e,z)-2,6-nonadienal (cucumber, melon).
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Butter + eggtop 17% of all pairsSmell alikemoderateCooked together118,967 recipes
Shared aroma: decanal (soap, orange peel).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Remains of any fish
- Forms the main body of the filling and provides the flavour of the pie.
- Melted butter
- Adds fat and richness, carrying flavour through the fish and keeping it moist.
- Mashed potatoes
- Forms a soft topping that bakes and browns into a crust over the filling.
- Egg yolk
- Brushed on top, it helps the potato topping take on a deeper golden colour.
The step that matters
Browning the potato top. Mashed potato browns slowly at 350°F, so the top may stay pale. A salamander or broiler adds direct heat that browns the surface quickly, but it can scorch if left unattended.
Swap the potato
How well each one fits the dish's main ingredients (fish, pepper, butter, egg):
- Capsicumfits about as well
- Asparagusfits about as well
- Potatothe original
- Chivefits about as well
Fit is the average pairing score against fish, pepper, butter, egg. 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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