Name: Mustard Sauce for Lettuce or Cabbage
Ingredients: 2 tablespoons white sugar; ⅔ tablespoon prepared mustard; 1 teaspoon salt; ⅓ teaspoon pepper; ¼ cup butter (size of a black walnut); 1 hard-boiled egg yolk; vinegar (to taste); 1-2 eggs (well beaten)

Why it works: Mustard and vinegar 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 for Lettuce or Cabbage

Ingredients

Directions

Make the sauce

In a bowl, mix together the sugar, mustard, salt, pepper, butter, and egg yolk.
Add vinegar as needed to achieve desired consistency.
Transfer the mixture to a saucepan and heat until it comes to a boil.
Stir in the beaten eggs and cook, stirring briskly, until thickened.

Serve

Pour the sauce over finely chopped cabbage or lettuce before serving.

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 + vinegartop 7% of all pairs

Smell alikemoderate

Cooked together14,067 recipes

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

Smell alikestrong

Cooked together849 recipes

Shared aroma: eucalyptol (eucalyptus, herbal).
Mustard + peppertop 9% of all pairs

Smell alikemoderate

Cooked together15,430 recipes

Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Pepper + walnuttop 13% of all pairs

Smell alikemoderate

Cooked together3,039 recipes

Shared aroma: 2-nonenal (fatty, green).
Pepper + vinegartop 14% of all pairs

Smell alikemoderate

Cooked together27,814 recipes

Shared aroma: 4'-methylacetophenone (bitter almond).

Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs

What each ingredient does

Eggs: Beaten eggs cook and thicken the sauce as it heats, giving it body.
Egg yolk: Adds richness and helps emulsify the butter into the sauce.
Butter: Adds fat and richness, smoothing the texture of the sauce.
White sugar: Balances the sharpness of the mustard and vinegar with sweetness.
Prepared mustard: Provides the sharp, pungent flavour that defines the sauce.
Vinegar: Adds acidity that brightens the sauce and sharpens its flavour.

The step that matters

Stir in the beaten eggs and cook, stirring briskly, until thickened. Egg proteins set as the sauce heats, thickening it. If the eggs are added without constant stirring or the sauce overheats, they can scramble into lumps instead of forming a smooth, thick sauce.

Swap the walnut

How well each one fits the dish's main ingredients (sugar, mustard, pepper, butter, egg, vinegar):

Sesamefits about as well
Beansfits about as well
Chestnutfits about as well
Walnutthe original

Fit is the average pairing score against sugar, mustard, pepper, butter, egg, vinegar. 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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Mustard Sauce for Lettuce or Cabbage