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Sauce

Boiled Dressing

A thickened mustard-based sauce made with butter, milk, eggs, and vinegar.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 7 ingredients
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Why it works: Butter and milk are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 81,283 recipes. Both carry (z)-4-heptenal, which smells biscuit, cream. The science ↓

Boiled Dressing

Ingredients

Directions

  1. Scald dry mustard, salt, and sugar with hot water.

  2. Pour in melted butter and milk.

  3. Add beaten eggs and cook over hot water until thickened, stirring constantly.

  4. Gradually add hot vinegar.

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 + milktop 7% of all pairs
    Smell alikemoderate
    Cooked together81,283 recipes

    Shared aroma: (z)-4-heptenal (biscuit, cream).

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

    Shared aroma: isobutyraldehyde (malty, green).

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

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

  4. Butter + eggtop 17% of all pairs
    Smell alikemoderate
    Cooked together118,967 recipes

    Shared aroma: decanal (soap, orange peel).

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

Eggs
Coagulate when heated, thickening the dressing into a creamy texture.
Butter
Adds richness and a smooth mouthfeel to the dressing.
Vinegar
Adds sharp acidity that balances the richness and sweetness.
Milk
Adds moisture and body, softening the dressing's texture.

The step that matters

Cooking the eggs over hot water. Eggs thicken as their proteins set with heat, but overheating can curdle them. Cooking gently over hot water while stirring constantly keeps the dressing smooth and evenly thickened.

Swap the mustard

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

  1. Capsicumfits about as well
  2. Potatofits about as well
  3. Mustardthe original
  4. Asparagusfits about as well

Fit is the average pairing score against sugar, butter, milk, egg, 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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