Name: Mustard Sauce
Ingredients: 1 tablespoon sugar; 3 tablespoons salad oil; 2 tablespoons vinegar; 1 teaspoon mixed mustard; pepper to taste; salt to taste

Why it works: Vinegar and mustard are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 14,067 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓

Mustard Sauce

Ingredients

Directions

In a bowl, combine the sugar, salad oil, vinegar, mixed mustard, pepper, and salt.
Beat all the ingredients together until well mixed.
This sauce requires no cooking.

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.

Vinegar + mustardtop 7% of all pairs

Smell alikemoderate

Cooked together14,067 recipes

Shared aroma: isobutyraldehyde (malty, green).
Mustard + peppertop 9% of all pairs

Smell alikemoderate

Cooked together15,430 recipes

Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Vinegar + peppertop 14% of all pairs

Smell alikemoderate

Cooked together27,814 recipes

Shared aroma: 4'-methylacetophenone (bitter almond).
Sugar + vinegartop 15% of all pairs

Smell alikemoderate

Cooked together20,806 recipes

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

Sugar: Adds sweetness to balance the sharpness of the vinegar and mustard.
Salad oil: Adds fat and smoothness, giving the sauce body and a rich mouthfeel.
Vinegar: Adds acidity that sharpens the flavor and cuts through the oil.
Mixed mustard: Adds pungent flavor and helps the oil and vinegar blend into a more stable mixture.