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 ↓
Boiled Dressing
Ingredients
Directions
Prepare
Separate the eggs.
In a bowl, combine the yolks with sugar, mustard, oil, salt, milk, paprika, and vinegar, adding the vinegar very slowly.
Cook and finish
Cook the mixture in a double boiler until thick.
Fold the mixture into the beaten egg whites until well combined.
Strain the dressing and let it cool.
Store in a cool place; it will keep for several days.
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 pairsSmell alikemoderateCooked together14,067 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Sugar + vinegartop 15% of all pairsSmell alikemoderateCooked together20,806 recipes
Shared aroma: beta-damascenone (apple, rose).
-
Egg + milktop 18% of all pairsSmell alikemoderateCooked together88,785 recipes
Shared aroma: 2-nonenal (fatty, green).
-
Sugar + milktop 18% of all pairsSmell alikelowCooked together77,875 recipes
Shared aroma: 2-nonenal (fatty, green).
-
Sugar + mustardtop 19% of all pairsSmell alikemoderateCooked together8,424 recipes
Shared aroma: guaiacol (smoky, sweet).
Sugar and milk barely smell alike, yet cooks put them together in 77,875 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
What each ingredient does
- Eggs
- Yolks thicken the dressing when cooked, and whites add lightness when folded in.
- Sugar
- Adds sweetness to balance the sharpness of the vinegar.
- Mustard
- Adds sharp flavour that complements the vinegar and egg.
- Milk
- Adds moisture and a mild, creamy body to the dressing.
- Vinegar
- Adds acidity that gives the dressing its tang.
The step that matters
Adding the vinegar slowly. Pouring hot vinegar into the yolks too quickly can heat them unevenly, causing curdling or lumps. Adding it gradually lets the yolks warm gently and blend smoothly before cooking.
Swap the mustard
How well each one fits the dish's main ingredients (egg, sugar, milk, vinegar):
- Capsicumfits better
- Mustardthe original
- Cucumberfits about as well
- Sweet potatofits about as well
Fit is the average pairing score against egg, sugar, milk, 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.
You might also like
The free Flavor Lab newsletter: one surprising pairing a week and the molecular reason it works, in 60 seconds. No spam, unsubscribe anytime.
Prefer an account? Create a free account to save pairings and unlock the full chemistry.
Tomato Soup526 recipes
Brown Bread461 recipes
Mutton Broth292 recipes
Yorkshire Pudding264 recipes