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To Dress a Cod’s Head and Shoulders

A method of dressing a cod's head and shoulders with salt, vinegar, egg, breadcrumbs, butter, and oyster sauce.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 10 ingredients
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Why it works: Bread and butter match in chemistry and in kitchens. They rank in the top 3% of all ingredient pairs, and 27,145 recipes mention both. Both carry delta-decalactone, which smells sweet, creamy. 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)

Directions

Prepare the cod

  1. Clean the cod's head and shoulders and soak it in coarse sea salt overnight.

  2. Skin the cod and bind it with tape to keep it firm.

Poach

  1. Place it in a fish kettle, back upwards, with plenty of cold water, a handful of salt, and vinegar.

  2. Heat slowly and boil for about 30 minutes.

  3. Let it drain on a rack over the kettle.

Finish and serve

  1. Transfer it to a serving dish, carefully removing the tape.

  2. Brush the cod with beaten egg, sprinkle with bread crumbs, pepper, and salt, and dot with butter.

  3. Brown it before a clear fire.

  4. Serve with rich oyster sauce around the fish, avoiding pouring it on top.

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

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

  2. Pepper + beeftop 4% of all pairs
    Aroma overlapstrong
    Mentioned together18,971 recipes

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

  3. Bread + oystertop 5% of all pairs
    Aroma overlapmoderate
    Mentioned together2,544 recipes

    Shared aroma: 2-nonenal (fatty, green).

  4. Bread + beeftop 5% of all pairs
    Aroma overlapstrong
    Mentioned together4,031 recipes

    Shared aroma: 2-acetyl-1-pyrroline (popcorn, roasted).

  5. Egg + oystertop 5% of all pairs
    Aroma overlapstrong
    Mentioned together4,093 recipes

    Shared aroma: 2-nonenal (fatty, green).

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, cooked whole and served as the centrepiece.
Beaten egg
Coats the surface so the bread crumbs adhere and the top browns evenly.
Bread crumbs
Form a crisp, golden crust on the surface when browned.
Butter
Adds fat that promotes browning and a rich flavour on the crust.
Vinegar
Acidity in the poaching water that helps keep the flesh firm and white.

The step that matters

Brown it before a clear fire. The egg, crumbs and butter only form a golden crust under direct, strong heat. Too little heat leaves the topping pale and soggy, while too much can scorch the crumbs before the surface is evenly coloured.

“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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