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
In a saucepan, combine 1 piece of butter, egg yolks, and lemon juice.
Place the saucepan over hot water and stir constantly until the butter melts.
Add the second piece of butter, and as the sauce thickens, add the third piece.
Gradually stir in the boiling water.
Cook while stirring constantly until the sauce reaches the consistency of soft custard.
Remove from heat and stir in salt and cayenne pepper.
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
- Egg yolks
- Emulsify the butter and thicken the sauce as they cook gently.
- Butter
- Adds richness and fat that is emulsified into the yolks for a smooth texture.
- Lemon juice
- Adds acidity that brightens the sauce and helps keep the emulsion stable.
The step that matters
Cook the sauce gently over hot water while stirring constantly. Egg yolks thicken at moderate heat but scramble if overheated. Constant stirring and gentle heat let the yolks set into a smooth custard while the butter emulsifies, preventing curdling.
“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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