Name: Another Tartar Mustard
Ingredients: 1 part mustard; 1 part horseradish vinegar; 1 part chili vinegar

Why it works: Mustard and horseradish match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 1,832 recipes. Both carry coumarin, which smells sweet, hay. The science ↓

Another Tartar Mustard

Ingredients

1 part mustard
1 part horseradish vinegar
1 part chili vinegar

Directions

Make the mustard

Mix mustard smoothly with horseradish vinegar and chili vinegar.
Transfer to jars or bottles and seal tightly.

Variations

You can use flavored vinegars like cucumber, shallot, or others, as well as mushroom, gherkin, or India pickle liquor.

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.

Mustard + horseradishtop 1% of all pairs

Smell alikestrong

Cooked together1,832 recipes

Shared aroma: coumarin (sweet, hay).
Mustard + vinegartop 7% of all pairs

Smell alikemoderate

Cooked together14,067 recipes

Shared aroma: isobutyraldehyde (malty, green).
Horseradish + vinegartop 12% of all pairs

Smell alikemoderate

Cooked together2,609 recipes

Shared aroma: isobutyraldehyde (malty, green).

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 base flavor of the condiment.
Horseradish vinegar: Adds sharpness and pungent heat that balances the mustard.
Chili vinegar: Adds acidity and gentle heat to the mixture.

“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.