Why it works: Pepper and lemon match in chemistry and in kitchens. They rank in the top 3% of all ingredient pairs, and cooks put them together in 27,047 recipes. Both carry trans-2-nonenal, which smells cardboard, fatty. The science ↓
Sauce Hollandaise
Ingredients
Directions
Make the base
Melt the butter in a saucepan over low heat, stirring with a wooden spoon.
Sprinkle the flour over the melted butter, stirring continuously.
Gradually pour in the warm water while stirring until the sauce thickens.
Finish and serve
Remove the saucepan from the heat.
In a bowl, beat the egg yolks with the lemon juice or vinegar.
Slowly add the egg mixture to the sauce, stirring continuously.
Let the sauce thicken, but do not let it boil, or it will curdle.
Serve over fish.
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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Pepper + lemontop 3% of all pairsSmell alikestrongCooked together27,047 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
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Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Flour + eggtop 15% of all pairsSmell alikelowCooked together106,462 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Butter + lemontop 16% of all pairsSmell alikemoderateCooked together41,227 recipes
Shared aroma: 3-hexenal (apple, fruity).
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Flour + lemontop 17% of all pairsSmell alikemoderateCooked together30,404 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
- Butter
- Provides fat and richness, giving the sauce its smooth, creamy body.
- Egg yolks
- Emulsify the butter and set into a thick, silky sauce when gently heated.
- Flour
- Thickens the warm butter and water into a stable base that holds the sauce together.
- Lemon juice or vinegar
- Adds acidity that brightens the rich butter and balances the sweetness of the yolks.
The step that matters
Adding the egg mixture without boiling. Egg yolks thicken through gentle heat, but if the sauce gets too hot they scramble and curdle. Stirring constantly and keeping the heat low prevents this.
“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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