Why it works: Lemon and pepper match in chemistry and in kitchens. They rank in the top 3% of all ingredient pairs, and 27,047 recipes mention both. Both carry trans-2-nonenal, which smells cardboard, fatty. The science ↓
Hollandaise Sauce
Ingredients
Directions
Rub the butter into a cream.
Add the egg yolks one at a time, beating well.
Stir in the lemon juice, pepper, and salt.
Add the boiling water five minutes before serving.
Place the bowl in a saucepan of boiling water and stir briskly until it thickens.
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 aroma chemistry they share, and how many recipes mention both.
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Lemon + peppertop 3% of all pairsAroma overlapstrongMentioned together27,047 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
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Butter + lemontop 16% of all pairsAroma overlapmoderateMentioned together41,227 recipes
Shared aroma: 3-hexenal (apple, fruity).
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Butter + eggtop 17% of all pairsAroma overlapmoderateMentioned together118,967 recipes
Shared aroma: decanal (soap, orange peel).
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Egg + lemontop 19% of all pairsAroma overlaplowMentioned together44,316 recipes
Shared aroma: (e,e)-2,4-decadienal (fatty, deep fried).
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Butter + peppertop 21% of all pairsAroma overlapmoderateMentioned together85,593 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
Egg and lemon share little aroma chemistry, yet 44,316 recipes mention both: they likely 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 richness and fat, giving the sauce a smooth, creamy mouthfeel.
- Egg yolks
- Emulsify with the butter and set as they heat, thickening the sauce into a custard-like texture.
- Lemon juice
- Adds acidity that brightens the rich butter and helps stabilise the emulsion.
- Boiling water
- Adds moisture that loosens the sauce and helps keep it from becoming too thick.
The step that matters
Place the bowl in a saucepan of boiling water and stir briskly until it thickens.. Egg yolks thicken only within a narrow temperature range. Too much heat scrambles them and curdles the sauce, while too little leaves it thin, so constant stirring over gentle heat matters.
“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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