Why it works: Milk and butter 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 ↓
Hollandaise Sauce
Ingredients
Directions
Prepare
Boil the vinegar with the seasonings.
Separate the yolks and whites of the eggs, beating them separately.
Make the sauce
Bring the milk to a boil and pour it over the yolks.
Add the boiling vinegar and stir on the stove until it thickens like custard; do not let it boil or it will curdle.
Remove from heat and beat the whipped egg whites with the melted butter or oil.
Store for future use and serve warm or cold.
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.
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Milk + buttertop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Vinegar + mustardtop 7% of all pairsSmell alikemoderateCooked together14,067 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Mustard + peppertop 9% of all pairsSmell alikemoderateCooked together15,430 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Vinegar + peppertop 14% of all pairsSmell alikemoderateCooked together27,814 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
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Butter + eggtop 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
- Eggs
- Yolks thicken the sauce as they set gently, and whites add lightness when beaten.
- Oil or melted butter
- Adds fat and richness, giving the sauce a smooth, silky mouthfeel.
- Vinegar
- Adds acidity that sharpens the flavor and balances the richness of the fat.
- Sweet milk
- Adds liquid and mild dairy flavor, helping make a smooth, custard-like base.
The step that matters
Stirring the custard without boiling. Egg yolks thicken as they warm gently, but high heat makes them scramble and curdle. Keep the heat low and stir steadily until the sauce coats a spoon.
Swap the mustard
How well each one fits the dish's main ingredients (vinegar, milk, butter, pepper, egg):
- Capsicumfits better
- Potatofits better
- Asparagusfits about as well
- Mustardthe original
Fit is the average pairing score against vinegar, milk, butter, pepper, egg. 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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