Why it works: Pepper and mustard are a kitchen classic. They rank in the top 6% of all ingredient pairs, and 15,427 recipes mention both. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
The recipe
Ingredients
Contains: milk, wheat, fish (auto-detected from the ingredients and method; we can miss things, so check labels)
Directions
Prepare the cod
Scald and clean the cod sounds thoroughly.
Simmer them until tender, then remove from heat.
Dredge the sounds with flour.
Cook and serve
Broil the sounds over a clear fire.
In a separate pan, make a brown gravy by combining salt, pepper, Harvey's sauce, mustard, flour, and butter.
Boil the gravy until thickened, then pour it over the broiled sounds.
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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Pepper + mustardtop 6% of all pairsAroma overlapmoderateMentioned together15,427 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Sauce + mustardtop 6% of all pairsAroma overlapmoderateMentioned together2,120 recipes
Shared aroma: ethanol (alcoholic, ethereal).
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Flour + buttertop 6% of all pairsAroma overlaplowMentioned together122,858 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Sauce + buttertop 8% of all pairsAroma overlaplowMentioned together15,317 recipes
Shared aroma: ethanol (alcoholic, ethereal).
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Flour + mustardtop 11% of all pairsAroma overlapmoderateMentioned together4,913 recipes
Shared aroma: isobutyraldehyde (malty, green).
Flour and butter share little aroma chemistry, yet 122,858 recipes mention both: they likely 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
- Cod sounds
- Form the main body of the dish, becoming flaky and tender when simmered and broiled.
- Flour
- Dusts the sounds for a light coating and thickens the gravy.
- Butter
- Adds richness and helps the gravy turn smooth and glossy.
- Mustard
- Adds sharpness that balances the richness of the gravy.
The step that matters
Boil the gravy until thickened. Flour needs to boil for it to fully thicken the gravy; if it stays underheated the gravy will remain thin and may taste raw.
Flavor stand-ins for the mustard
How well each one fits the dish's main ingredients (flour, pepper, sauce, butter):
- Capsicumbetter flavor fit
- Shallotabout as good a flavor fit
- Potatoabout as good a flavor fit
- Mustardthe original
Fit is the average pairing score against flour, pepper, sauce, butter. 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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