Why it works: Ketchup and sauce match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 1,099 recipes. Both carry ethanol, which smells alcoholic, ethereal. The science ↓
Indian Mustard
Ingredients
Directions
Make the paste
In a bowl, mix equal parts mustard and flour to form a stiff paste with boiling water.
Add salt to the mixture.
Make the sauce
In a saucepan, boil the shallots with vinegar, mushroom ketchup, and anchovy sauce for 10 minutes.
Pour the hot mixture over the mustard and flour paste, stirring until smooth.
Store
Store in bottles, adding a bruised shallot to each bottle.
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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Ketchup + saucetop 1% of all pairsSmell alikestrongCooked together1,099 recipes
Shared aroma: ethanol (alcoholic, ethereal).
-
Mustard + shallottop 1% of all pairsSmell alikestrongCooked together859 recipes
Shared aroma: eucalyptol (eucalyptus, herbal).
-
Anchovy + saucetop 2% of all pairsSmell alikemoderateCooked together2,057 recipes
Shared aroma: ethanol (alcoholic, ethereal).
-
Ketchup + anchovytop 2% of all pairsSmell alikestrongCooked together479 recipes
Shared aroma: ethanol (alcoholic, ethereal).
-
Shallot + mushroomtop 4% of all pairsSmell alikemoderateCooked together1,982 recipes
Shared aroma: 2,4-decadienal (seaweed).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Mustard
- Provides the sharp, pungent flavour that defines the sauce.
- Flour
- Thickens the paste so the mustard holds a stiff, smooth body.
- Shallots
- Add a mild, savoury onion-like aroma to the sauce.
- Vinegar
- Adds acidity that sharpens flavour and helps preserve the sauce.
- Mushroom ketchup
- Contributes deep savoury umami flavour.
- Anchovy sauce
- Adds salty, savoury depth to the sauce.
The step that matters
Pour the hot mixture over the paste while stirring. Adding the hot liquid gradually while stirring lets the flour starch hydrate evenly, so the sauce becomes smooth rather than lumpy.
Swap the mustard
How well each one fits the dish's main ingredients (flour, shallot, vinegar, mushroom, ketchup, anchovy, sauce):
- Horseradishfits about as well
- Chivefits about as well
- Mustardthe original
- Capsicumfits about as well
Fit is the average pairing score against flour, shallot, vinegar, mushroom, ketchup, anchovy, sauce. 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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