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 ↓
Salad Dressing
Ingredients
Directions
Make the dressing
Mash the yolks in a bowl.
Add sugar, salt, mustard, and white pepper; mix thoroughly.
Stir in the beaten eggs, melted butter, and vinegar.
Cook in a double boiler until thickened.
Finish and cool
Remove from heat and let cool.
Once cool, fold in the thick sour cream.
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.
Photo for illustrative purposes only · Contact us to use it
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 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).
-
Sugar + creamtop 9% of all pairsSmell alikemoderateCooked together43,450 recipes
Shared aroma: 2,3-butanedione (butter, sweet).
-
Sugar + vinegartop 15% of all pairsSmell alikemoderateCooked together20,806 recipes
Shared aroma: beta-damascenone (apple, rose).
-
Egg + buttertop 17% of all pairsSmell alikemoderateCooked together118,967 recipes
Shared aroma: decanal (soap, orange peel).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Egg yolks
- Emulsify with the butter and add richness and body to the dressing.
- Beaten eggs
- Set when heated in the double boiler, thickening the dressing into a smooth sauce.
- Melted butter
- Adds fat for richness and a smooth, silky mouthfeel.
- Vinegar
- Provides acidity that brightens the flavor and balances the sugar and fat.
- Sour cream
- Adds tang and creaminess to the cooled dressing.
The step that matters
Cook in a double boiler until thickened. Eggs thicken gently with indirect heat. Too much heat scrambles the egg proteins, leaving lumps and a grainy texture instead of a smooth dressing.
Swap the white pepper
How well each one fits the dish's main ingredients (sugar, egg, butter, vinegar, mustard, cream):
- Tarragonfits better
- Capersfits better
- Nutmegfits better
- White pepperthe original
Fit is the average pairing score against sugar, egg, butter, vinegar, mustard, cream. 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.
More salad dressing recipes
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.

Chicken Salad623 recipes
Tomato Salad179 recipes
Cold Slaw160 recipes
French Dressing58 recipes