Why it works: Potato and milk match in chemistry and in kitchens. They rank in the top 4% of all ingredient pairs, and 3,611 recipes mention both. Both carry (e,z)-2,6-nonadienal, which smells cucumber, melon. The science ↓
The recipe
Ingredients
Contains: egg, milk, fish (auto-detected from the ingredients and method; we can miss things, so check labels)
Directions
The book gives no oven temperature. The 400°F (200°C) in the steps was added when the recipe was transcribed, as a starting point.
Prepare
Preheat the oven to 400°F (200°C).
Remove the bones and skin from the salt cod and place the flesh in a pie dish.
Pour the leftover egg sauce over the cod and season lightly with pepper.
If there is no egg sauce, use fresh melted butter to moisten the fish.
Assemble and bake
Mash a few potatoes with milk or butter.
Arrange the mashed potatoes around the edge of the fish.
Bake for about 30 minutes, or until the potatoes are golden brown.
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 aroma chemistry they share, and how many recipes mention both.
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Potato + milktop 4% of all pairsAroma overlapstrongMentioned together3,611 recipes
Shared aroma: (e,z)-2,6-nonadienal (cucumber, melon).
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Pepper + potatotop 5% of all pairsAroma overlapstrongMentioned together8,303 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Egg + milktop 9% of all pairsAroma overlapmoderateMentioned together88,465 recipes
Shared aroma: 2-nonenal (fatty, green).
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Pepper + milktop 12% of all pairsAroma overlapstrongMentioned together26,983 recipes
Shared aroma: ethyl 2-methylbutyrate (fruity, apple).
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Sauce + potatotop 14% of all pairsAroma overlaplowMentioned together1,072 recipes
Shared aroma: ethanol (alcoholic, ethereal).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Salt cod
- Forms the main body of the dish, providing the savoury, flaky fish base.
- Egg sauce
- Adds moisture and richness so the fish does not dry out in the oven.
- Potatoes
- Form a mashed topping that browns in the oven, adding a golden crust.
- Milk or butter
- Adds fat and moisture to the mashed potatoes, making them smooth and creamy.
The step that matters
Arrange the mashed potatoes around the edge of the fish. The potatoes act as a border that holds in moisture and browns during baking, so the fish beneath stays tender while the topping turns golden.
Flavor stand-ins for the potato
How well each one fits the dish's main ingredients (egg, sauce, pepper, milk):
- Capsicumbetter flavor fit
- Tomatoabout as good a flavor fit
- Asparagusabout as good a flavor fit
- Potatothe original
Fit is the average pairing score against egg, sauce, pepper, milk. Candidates are from the same food group and used in at least 100 recipes. This compares flavor only: it does not check the job the ingredient does in the dish (bulk, moisture, acidity, structure).
“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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