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Mackerel, with Black Butter

Mackerel cooked in salted water and topped with a hot butter‑parsley sauce, finished with vinegar.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 ingredients
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Why it works: Butter and parsley are a kitchen classic. They rank in the top 15% of all ingredient pairs, and cooks put them together in 28,563 recipes. Both carry trans-2-hexenal, which smells green, leafy. The science ↓

Mackerel, with Black Butter

Ingredients

Directions

Cook the fish

  1. Broil or boil the mackerel in salted water.

Make the black butter

  1. Heat the butter in a frying pan until very hot.

  2. Fry the parsley in the butter.

  3. Pour the butter and parsley over the mackerel.

Finish and serve

  1. Rinse the frying pan with vinegar.

  2. Pour the vinegar over the plate.

  3. Serve immediately.

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 their aromas overlap, and how often cooks already put them together.

  1. Butter + parsleytop 15% of all pairs
    Smell alikemoderate
    Cooked together28,563 recipes

    Shared aroma: trans-2-hexenal (green, leafy).

  2. Parsley + vinegartop 16% of all pairs
    Smell alikemoderate
    Cooked together6,477 recipes

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

  3. Butter + vinegartop 23% of all pairs
    Smell alikemoderate
    Cooked together13,513 recipes

    Shared aroma: isoamyl acetate (banana, pear).

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

What each ingredient does

Mackerel
Forms the main body of the dish, providing the protein and flaky texture.
Butter
Fat that is heated until browned, giving the sauce its nutty, dark flavour.
Parsley
Fried briefly in the butter, adding a fresh herbal aroma and crisp texture.
Vinegar
Adds sharp acidity that cuts through the rich, browned butter.

The step that matters

Heating the butter until very hot. Butter must be heated until the milk solids brown without burning. Too little heat leaves the sauce pale and flat, while overheating turns it bitter and acrid. Watch closely as the colour darkens.

Swap the parsley

How well each one fits the dish's main ingredients (butter, vinegar):

  1. Tarragonfits better
  2. Garlicfits about as well
  3. Parsleythe original
  4. Capersfits about as well

Fit is the average pairing score against butter, vinegar. Candidates are from the same food group and used in at least 100 recipes.

“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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