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To Dress a Cod's Head

A sauce made from a cod head, tail, and naddocks, thickened with butter and flour, seasoned with catsup, white wine, pepper, and salt.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 11 ingredients
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Why it works: Butter and white wine match in chemistry and in kitchens. They rank in the top 3% of all ingredient pairs, and 5,039 recipes mention both. Both carry ethyl octanoate, which smells fruity, wine. The science ↓

The recipe

Ingredients

Contains: milk, wheat, fish, shellfish (auto-detected from the ingredients and method; we can miss things, so check labels)

Directions

Make the stock

  1. Parboil the cod's head and tail with the naddocks, onions, whole pepper, and salt.

  2. Remove the cod fish.

  3. Boil the stock for 30 minutes.

  4. Strain the stock and thicken it with butter mixed with flour.

Finish the dressing

  1. Add catsup and white wine to the thickened stock.

  2. Slice the tail.

  3. Pick the fish from the head and add it to the boiling sauce.

  4. Let it boil for a few minutes.

  5. Add oysters or mussels if desired.

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

    Shared aroma: ethyl octanoate (fruity, wine).

  2. Onion + white winetop 5% of all pairs
    Aroma overlapmoderate
    Mentioned together4,426 recipes

    Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).

  3. Butter + oystertop 5% of all pairs
    Aroma overlapstrong
    Mentioned together8,175 recipes

    Shared aroma: 2,6-nonadienal (cucumber, green).

  4. Butter + flourtop 6% of all pairs
    Aroma overlaplow
    Mentioned together122,858 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  5. Onion + peppertop 6% of all pairs
    Aroma overlapmoderate
    Mentioned together68,463 recipes

    Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).

Butter and flour 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

Butter
Melts with flour to form a roux that thickens the stock into a smooth sauce.
Flour
Thickens the stock with butter, giving the dressing body.
White wine
Adds acidity and aroma that brighten the rich fish stock.
Onions
Add sweetness and aromatic flavor to the stock.

The step that matters

Thickening the stock with butter and flour. Flour must be cooked with the butter before or as it meets the hot stock, otherwise it stays lumpy and tastes raw. Stirring the mixture in smoothly gives an even, glossy sauce.

Flavor stand-ins for the onion

How well each one fits the dish's main ingredients (haddock, pepper, butter, flour, white wine, oyster):

  1. Potatobetter flavor fit
  2. Shallotabout as good a flavor fit
  3. Capsicumabout as good a flavor fit
  4. Onionthe original

Fit is the average pairing score against haddock, pepper, butter, flour, white wine, oyster. 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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