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Mustard the Common Way

A thick mustard batter made with mustard flour, salt, boiling water, and optional powdered sugar.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 4 ingredients
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Why it works: Mustard and flour are a kitchen classic. They rank in the top 13% of all ingredient pairs, and cooks put them together in 5,066 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓

Mustard the Common Way

Ingredients

Directions

Make the sauce

  1. In a bowl, mix the mustard flour and coarse sea salt.

  2. Gradually add boiling water while stirring until the mixture resembles a thick batter.

  3. Beat the mixture well with a spoon until smooth.

Store

  1. Allow it to cool before transferring to a mustard container.

  2. If desired, mix in powdered sugar for added sweetness.

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 + flourtop 13% of all pairs
    Smell alikemoderate
    Cooked together5,066 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  2. Flour + sugartop 15% of all pairs
    Smell alikemoderate
    Cooked together92,116 recipes

    Shared aroma: phenylacetaldehyde (hawthorne, honey).

  3. 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

Mustard flour
Provides the main body and pungent flavour of the sauce once hydrated with water.
Boiling water
Hydrates the mustard flour, turning it into a thick, smooth batter.
Powdered sugar
Adds sweetness that balances the sharp bite of the mustard.

The step that matters

Adding the boiling water. Mustard's pungency comes from enzymes and compounds released when the flour is mixed with water, and the mixing temperature and timing affect how sharp the mustard becomes. Adding the water gradually while stirring keeps the batter smooth and even in texture.

Swap the mustard

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

  1. Arrowrootfits better
  2. Beetrootfits better
  3. Sweet potatofits better
  4. Mustardthe original

Fit is the average pairing score against flour, sugar. 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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