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Sauce

Black Butter

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

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 ingredients
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Why it works: Parsley and pepper match in chemistry and in kitchens. They rank in the top 2% of all ingredient pairs, and cooks put them together in 34,122 recipes. Both carry 4'-methylacetophenone, which smells bitter almond. The science ↓

Black Butter

Ingredients

Directions

  1. Melt the butter in a stew pan over medium heat until it turns brown.

  2. Add the parsley leaves, vinegar, salt, and pepper.

  3. Boil the mixture for 1 minute.

  4. Serve with boiled fish.

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. Parsley + peppertop 2% of all pairs
    Smell alikestrong
    Cooked together34,122 recipes

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

  2. Vinegar + peppertop 14% of all pairs
    Smell alikemoderate
    Cooked together27,814 recipes

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

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

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

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

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

  5. Butter + peppertop 21% of all pairs
    Smell alikemoderate
    Cooked together85,593 recipes

    Shared aroma: trans-2-nonenal (cardboard, fatty).

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

What each ingredient does

Butter
Browns to give the sauce a nutty, toasted flavour and a rich fat base.
Vinegar
Adds acidity that sharpens the rich butter and balances its flavour.
Parsley leaves
Contribute a fresh, herbal aroma and flavour to the sauce.

The step that matters

Browning the butter. Butter's milk solids brown quickly and then burn, which turns the sauce bitter. Watch the colour closely and stop once it reaches a golden-brown, nutty stage.

Swap the parsley

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

  1. Tarragonfits about as well
  2. Parsleythe original
  3. Thymefits less well
  4. Dillfits less well

Fit is the average pairing score against butter, vinegar, pepper. 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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