Why it works: Butter and milk are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 81,283 recipes. Both carry (z)-4-heptenal, which smells biscuit, cream. 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.
Make the potato mash
Mash the hot potatoes and mix with butter and milk.
Season with salt, pepper, and nutmeg, and mix well.
Assemble the pie
Remove skin and bones from the fish, flake it finely, and place it in a greased shallow pie dish lined with mashed potatoes.
Season the fish with salt and pepper.
Pour in the fish stock or fish sauce.
Cover with remaining mashed potatoes, smooth the surface, and create a pattern with a fork.
Brush lightly with beaten egg.
Bake
Bake in a 350°F (175°C) oven for 25 to 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 + milktop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Pepper + nutmegtop 7% of all pairsSmell alikestrongCooked together13,015 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
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Potato + nutmegtop 8% of all pairsSmell alikemoderateCooked together1,052 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
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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
- Potatoes
- Form the bulk of the topping, which crisps and browns as it bakes.
- Butter
- Adds richness and fat, giving the mash a smooth texture.
- Milk
- Adds moisture so the mashed potato becomes soft and spreadable.
- Cold cooked fish
- Provides the main filling, flaked so it blends into the sauce and layers.
- Fish stock or fish sauce
- Adds liquid and savory depth to the fish filling.
- Egg
- Brushed on top, it promotes browning and a glossy golden finish.
The step that matters
Smoothing and sealing the potato topping. Mashed potato spread thickly over the fish seals in the moist filling, and a smooth, even layer helps it brown evenly rather than drying or leaving wet spots.
Swap the nutmeg
How well each one fits the dish's main ingredients (potato, butter, milk, pepper, fish, egg):
- Parsleyfits about as well
- Nutmegthe original
- Thymefits about as well
- Dillfits about as well
Fit is the average pairing score against potato, butter, milk, pepper, fish, 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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