Why it works: Parsley and pepper match in chemistry and in kitchens. They rank in the top 2% of all ingredient pairs, and 34,118 recipes mention both. Both carry 4'-methylacetophenone, which smells bitter almond. The science ↓
The recipe
Ingredients
Contains: egg, milk, wheat, fish (auto-detected from the ingredients and method; we can miss things, so check labels)
Directions
The book says “a moderately hot oven”. The 350°F (175°C) in the steps is the modern equivalent, not the book's own figure.
Prepare
Wash and dry the fish thoroughly.
Make a stuffing with 2 tablespoons bread crumbs, parsley, onion, pepper, salt, and butter moistened with 1 egg.
Stuff the mixture into the open part of the fish and secure it with skewers.
Brush the fish with the remaining beaten egg and sprinkle with bread crumbs, pepper, and salt.
Bake and serve
Place the fish in a well‑buttered deep dish, add a few pieces of butter on top, and bake at 350 °F (175 °C) for about 45 minutes, basting occasionally.
Serve hot in the dish it was cooked in.
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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Parsley + peppertop 2% of all pairsAroma overlapstrongMentioned together34,118 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
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Bread + buttertop 3% of all pairsAroma overlapstrongMentioned together27,145 recipes
Shared aroma: delta-decalactone (sweet, creamy).
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Egg + breadtop 6% of all pairsAroma overlapstrongMentioned together22,584 recipes
Shared aroma: (e)-2-octenal (fatty, green).
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Parsley + oniontop 6% of all pairsAroma overlapstrongMentioned together25,834 recipes
Shared aroma: coumarin (sweet, hay).
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Onion + peppertop 6% of all pairsAroma overlapmoderateMentioned together68,463 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Cod
- Forms the main body of the dish and cooks into flakes as it bakes.
- Eggs
- Bind the buttered stuffing and form a glaze that helps the crumbs brown.
- Bread crumbs
- Absorb butter and juices to add body to the stuffing and crisp the surface.
- Butter
- Adds moisture and richness, helping the fish stay tender and the top brown.
- Onion
- Adds aroma and savoury flavour to the stuffing as it cooks.
The step that matters
Basting the fish during baking. Cod is lean and dries out quickly in the oven. Regular basting with butter and juices keeps the flesh moist and promotes even browning on the surface.
Flavor stand-ins for the onion
How well each one fits the dish's main ingredients (egg, bread, butter, parsley, pepper):
- Capsicumbetter flavor fit
- Potatobetter flavor fit
- Carrotbetter flavor fit
- Onionthe original
Fit is the average pairing score against egg, bread, butter, parsley, pepper. 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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