Why it works: Butter and milk are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 81,283 recipes. Both carry (z)-4-heptenal, which smells biscuit, cream. The science ↓
Cooked Salad Dressing
Ingredients
Directions
Beat the egg yolks in a bowl.
Add the sugar, salt, mustard, pepper, and flour; mix well.
Slowly add the sweet milk while stirring.
Then add the hot vinegar and mix.
Cook in a double boiler until thick like very thick cream.
Remove from heat and stir in the butter until melted and combined.
For a milder dressing, add ½ cup of thick 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.
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.
-
Butter + milktop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
-
Mustard + vinegartop 7% of all pairsSmell alikemoderateCooked together14,067 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Mustard + flourtop 13% of all pairsSmell alikemoderateCooked together5,066 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Milk + flourtop 14% of all pairsSmell alikelowCooked together78,219 recipes
Shared aroma: isobutyraldehyde (malty, green).
Butter and flour barely smell alike, yet cooks put them together in 124,287 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
- Egg yolks
- Thicken the dressing and add richness as they cook into a custard-like base.
- Flour
- Stabilizes the dressing so it thickens smoothly and holds its body without separating.
- Sweet milk
- Forms the creamy liquid base that the egg yolks and flour thicken.
- Hot vinegar
- Adds the sharp acidity that balances the richness and sweetness of the dressing.
- Butter
- Adds fat and a smooth, rounded mouthfeel to the finished dressing.
The step that matters
Cook in a double boiler until thick like very thick cream. Egg yolks can curdle or scramble if overheated. Gentle, indirect heat from a double boiler lets the yolks and flour thicken the dressing evenly without lumps or separation.
Swap the white pepper
How well each one fits the dish's main ingredients (mustard, butter, egg, vinegar, milk, flour, sugar):
- Cinnamonfits better
- Capersfits better
- Tarragonfits better
- White pepperthe original
Fit is the average pairing score against mustard, butter, egg, vinegar, milk, flour, sugar. 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.
Raspberry Vinegar214 recipes
Sugar Vinegar20 recipes
Vegetable Soup350 recipes
Brown Coffee with Egg175 recipes