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Sauce

Prepared Mustard

A thickened mustard sauce made with mustard, vinegar, sugar, salt, egg, and butter.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 ingredients
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Why it works: Mustard and vinegar 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 ↓

Prepared Mustard

Ingredients

Directions

  1. In a bowl, stir the mustard into the vinegar.

  2. Add the sugar, salt, and beaten egg.

  3. Place the bowl in a pan of boiling water on the stove.

  4. Stir the mixture until it thickens.

  5. Remove from heat and stir in the butter while hot.

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. Mustard + vinegartop 7% of all pairs
    Smell alikemoderate
    Cooked together14,067 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  2. Sugar + vinegartop 15% of all pairs
    Smell alikemoderate
    Cooked together20,806 recipes

    Shared aroma: beta-damascenone (apple, rose).

  3. Egg + buttertop 17% of all pairs
    Smell alikemoderate
    Cooked together118,967 recipes

    Shared aroma: decanal (soap, orange peel).

  4. Sugar + buttertop 17% of all pairs
    Smell alikemoderate
    Cooked together98,233 recipes

    Shared aroma: guaiacol (smoky, sweet).

  5. Mustard + sugartop 19% of all pairs
    Smell alikemoderate
    Cooked together8,424 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

Egg
Thickens the sauce as it cooks, giving it a smooth, creamy body.
Mustard
Provides the sharp, pungent flavour that defines the sauce.
Vinegar
Adds acidity that balances the sweetness and sharpness of the mustard.
Butter
Stirred in while hot, it adds richness and a glossy finish.
Sugar
Balances the acidity of the vinegar and mustard with sweetness.

The step that matters

Stirring the egg mixture over boiling water. Egg proteins set gradually when gently heated. Too much heat or too little stirring can scramble the egg, leaving lumps, so the mixture should be stirred steadily until it thickens smoothly.

Swap the mustard

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

  1. Mustardthe original
  2. Capsicumfits about as well
  3. Cucumberfits about as well
  4. Shallotfits about as well

Fit is the average pairing score against sugar, egg, vinegar, 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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