Why it works: Haddock and sauce match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 200 recipes. Both carry ethanol, which smells alcoholic, ethereal. 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. The book gives no cooking times either; the times in the steps were added in transcription, so check for doneness rather than trusting the clock.
Prepare
Preheat the oven to 350°F (175°C).
Place a few pieces of bacon at the bottom of a pie dish.
Cut the fresh cod or haddock into pieces and layer them over the bacon.
Add the chopped onion and parsley between the layers of fish.
Season with pepper and coarse sea salt.
Make the gravy
In a saucepan, heat the butter and stir in the flour until brown.
Gradually add the warm water and flavor with brown sauce or catsup.
Assemble and bake
Pour the gravy over the fish.
Cover with pie crust and bake gently until the fish is cooked through, about 30-40 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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Haddock + saucetop 1% of all pairsSmell alikestrongCooked together200 recipes
Shared aroma: ethanol (alcoholic, ethereal).
-
Parsley + peppertop 2% of all pairsSmell alikestrongCooked together34,122 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Onion + parsleytop 9% of all pairsSmell alikemoderateCooked together25,843 recipes
Shared aroma: 2,4-decadienal (seaweed).
-
Onion + peppertop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
Butter and flour barely smell alike, yet cooks put them together in 124,287 recipes: they work on texture and structure more than aroma.
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Fresh cod or haddock
- Forms the main body of the pie and cooks through in the oven.
- Butter
- Provides fat for cooking the flour and carries flavor into the gravy.
- Flour
- Thickens the warm water into a gravy that coats the fish.
- Bacon
- Releases fat and salty, smoky flavor into the fish below.
- Brown sauce or catsup
- Adds sweetness, acidity and savory depth to the gravy.
The step that matters
Cooking the flour in the butter. Stirring flour into hot butter and cooking it briefly removes raw starch taste and lets the flour thicken smoothly when the warm water is added gradually. Adding all the liquid at once can cause lumps.
Swap the onion
How well each one fits the dish's main ingredients (haddock, parsley, pepper, butter, flour, sauce):
- Shallotfits better
- Chivefits better
- Potatofits better
- Onionthe original
Fit is the average pairing score against haddock, parsley, pepper, butter, flour, sauce. 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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