Why it works: Mustard and celery are a kitchen classic. They rank in the top 2% of all ingredient pairs, and cooks put them together in 4,169 recipes. Both carry guaiacol, which smells smoky, sweet. The science ↓
A Good Boiled Dressing
Ingredients
Directions
Prepare the base
Beat the yolks of 4 eggs in a bowl.
Add 1 teaspoon of sugar and 1 teaspoon of mixed mustard.
Stir in ½ cup of vinegar, ½ cup of butter, and ½ cup of cream.
Cook the dressing
Place the bowl over hot water on the stove and stir frequently until thick like boiled custard.
Season and store
Once cooled, season with salt, pepper, and celery extract if desired.
Thin the dressing with lemon juice as needed.
Refrigerate and use within 10 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 + celerytop 2% of all pairsSmell alikemoderateCooked together4,169 recipes
Shared aroma: guaiacol (smoky, sweet).
-
Pepper + celerytop 5% of all pairsSmell alikestrongCooked together16,012 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Mustard + vinegartop 7% of all pairsSmell alikemoderateCooked together14,067 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Butter + creamtop 8% of all pairsSmell alikemoderateCooked together41,516 recipes
Shared aroma: delta-dodecalactone (sweet, creamy).
-
Mustard + peppertop 9% of all pairsSmell alikemoderateCooked together15,430 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Egg yolks
- Their proteins set when heated, thickening the dressing and giving it body.
- Vinegar
- Adds sharp acidity that cuts the richness of the butter and cream.
- Butter
- Adds fat for smooth richness and a silky mouthfeel.
- Cream
- Adds moisture and softens the dressing's texture.
- Sugar
- Adds sweetness that balances the sharpness of the vinegar.
- Mixed mustard
- Its emulsifying compounds help hold the fat and liquids together smoothly.
The step that matters
Cooking over hot water until thick. Egg yolk proteins thicken with gentle heat, but too much heat or too little stirring can scramble them into lumps. Stir frequently over moderate heat so the custard thickens evenly and stays smooth.
Swap the celery
The recipe marks celery as optional. How well each one fits the dish's main ingredients (egg, sugar, mustard, vinegar, butter, cream, pepper):
- Tarragonfits better
- Nutmegfits better
- Capersfits better
- Celerythe original
Fit is the average pairing score against egg, sugar, mustard, vinegar, butter, cream, pepper. 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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