Why it works: Flour and mustard 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 ↓
To Make a Mustard Plaster
Ingredients
Directions
Mix flour and water to form a stiff paste.
Spread the paste on a cloth.
Sprinkle dry mustard thickly on the paste.
Place a thin cloth over the mustard and dampen it with hot water.
For a milder plaster, mix mustard with the white of an egg and a little water instead.
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.
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Flour + mustardtop 13% of all pairsSmell alikemoderateCooked together5,066 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Flour + eggtop 15% of all pairsSmell alikelowCooked together106,462 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Mustard + eggtop 28% of all pairsSmell alikemoderateCooked together9,210 recipes
Shared aroma: (e)-2-octenal (fatty, green).
Flour and egg barely smell alike, yet cooks put them together in 106,462 recipes: they work on texture and structure more than aroma.
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
Swap the mustard
How well each one fits the dish's main ingredients (flour, egg):
- Arrowrootfits better
- Chivefits better
- Shallotfits better
- Mustardthe original
Fit is the average pairing score against flour, egg. Candidates are from the same food group and used in at least 100 recipes.
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