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Sauce

Sour Sauce for Fish

A quick vinegar-based sauce with mustard, pepper, and butter for fish.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 4 ingredients
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Why it works: Vinegar and mustard are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 14,067 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓

Sour Sauce for Fish

Ingredients

Directions

  1. Heat the vinegar in a saucepan.

  2. Stir in the mustard and pepper.

  3. Add the slice of butter and stir until dissolved.

  4. 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. Vinegar + mustardtop 7% of all pairs
    Smell alikemoderate
    Cooked together14,067 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  2. Mustard + peppertop 9% of all pairs
    Smell alikemoderate
    Cooked together15,430 recipes

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

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

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

  4. Pepper + buttertop 21% of all pairs
    Smell alikemoderate
    Cooked together85,593 recipes

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

  5. Mustard + buttertop 22% of all pairs
    Smell alikemoderate
    Cooked together8,003 recipes

    Shared aroma: guaiacol (smoky, sweet).

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

What each ingredient does

Vinegar
Provides the sharp, acidic flavor that defines the sauce.
Prepared mustard
Adds sharpness and helps keep the butter and vinegar blended together.
Butter
Adds richness and a smooth, glossy body as it melts into the sauce.

The step that matters

Adding the butter. Butter melts into warm vinegar to form a smooth sauce. If the mixture is too hot, the butter can separate into greasy droplets instead of staying blended, so it should be stirred gently until dissolved.

Swap the mustard

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

  1. Capsicumfits better
  2. Mustardthe original
  3. Cabbagefits less well
  4. Onionfits less well

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