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To Boil a Cod’s Head and Shoulders

A boiled cod head and shoulders served with roe, milt, lobster, oysters, and a butter‑flour gravy.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 12 ingredients
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Why it works: Pepper and parsley 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, shellfish (auto-detected from the ingredients and method; we can miss things, so check labels)

Also mentioned in the method: lobster, oyster

Directions

Prepare the fish

  1. Wash the cod's head and shoulders clean and dry them with a cloth.

  2. In a pot, combine 3 measures of water with 1 measure of coarse sea salt and bring to a boil.

  3. Remove any scum from the pot, then add the fish and boil rapidly for 25 to 30 minutes.

Coat and brown

  1. Rub the boiled fish with the yolks of 2 or 3 eggs.

  2. Coat the fish with a thick layer of grated bread crumbs mixed with pepper and minced parsley.

  3. Dot the fish with small pieces of butter and place it in the oven to brown.

Make the sauce

  1. In a separate pan, mix ¼ pound of butter with a large tablespoon of flour, 1 quart of gravy, 1 tea-cup of white wine, pepper, salt, and a little grated nutmeg.

  2. Mince the white meat of a lobster.

  3. Slightly brown 3 dozen oysters in a frying pan.

  4. Add the lobster and oysters with half their liquor to the gravy.

Serve

  1. Serve the boiled fish with the roe and milt parboiled, sliced, and fried, garnished with curled parsley and horseradish.

Recipe from a historical cookbook (Internet Archive).

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.

  1. Pepper + parsleytop 2% of all pairs
    Aroma overlapstrong
    Mentioned together34,118 recipes

    Shared aroma: 4'-methylacetophenone (bitter almond).

  2. Bread + buttertop 3% of all pairs
    Aroma overlapstrong
    Mentioned together27,145 recipes

    Shared aroma: delta-decalactone (sweet, creamy).

  3. Parsley + nutmegtop 3% of all pairs
    Aroma overlapstrong
    Mentioned together5,062 recipes

    Shared aroma: 4'-methylacetophenone (bitter almond).

  4. Butter + white winetop 3% of all pairs
    Aroma overlapstrong
    Mentioned together5,039 recipes

    Shared aroma: ethyl octanoate (fruity, wine).

  5. Pepper + nutmegtop 4% of all pairs
    Aroma overlapstrong
    Mentioned together13,015 recipes

    Shared aroma: 4'-methylacetophenone (bitter almond).

Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs

What each ingredient does

Cod's head and shoulders
Forms the main body of the dish and is cooked by boiling until firm and flaky.
Egg yolks
Brushed on the fish to add richness and help the bread crumb coating brown and hold.
Grated bread crumbs
Form a crust over the fish that browns in the oven and adds texture.
Butter
Adds richness to the crust and enriches the sauce, helping it brown and taste rounded.
Flour (in the method)
Thickens the butter and gravy mixture into a smooth sauce.
Oysters (in the method)
Lightly browned, they add briny flavour and tender texture to the sauce.

The step that matters

Boiling the fish rapidly. Boiling vigorously for the stated time cooks the thick head and shoulders through; if the water is too gentle or the time is cut short, the centre stays underdone and the flesh does not flake cleanly.

Flavor stand-ins for the nutmeg

How well each one fits the dish's main ingredients (egg, bread, pepper, parsley, butter, tea, white wine):

  1. Thymeabout as good a flavor fit
  2. Nutmegthe original
  3. Sageabout as good a flavor fit
  4. Marjoramabout as good a flavor fit

Fit is the average pairing score against egg, bread, pepper, parsley, butter, tea, white wine. 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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