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Sauce

Black Butter

A browned butter sauce with parsley and vinegar, served over boiled fish.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 3 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 ↓

Black Butter

Ingredients

Directions

Make the sauce

  1. Melt the butter over medium heat in a frying pan until it darkens, being careful not to burn it.

  2. Add the parsley sprigs and fry them briefly.

Serve

  1. Pour the butter and parsley over the boiled fish.

  2. Add vinegar to the frying pan, heat it, and pour it over the fish.

  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

Butter
Provides the rich fat base, and as it darkens its milk solids toast for a nutty flavour.
Vinegar
Adds acidity that sharpens and balances the rich, buttery sauce.

The step that matters

Darkening the butter without burning it. As butter heats, its milk solids brown and give a nutty flavour. If they go past golden into black, they turn bitter and acrid, so the pan needs close attention and medium heat.

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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