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
Beat the butter until creamy.
Add the egg yolks, lemon juice, salt, and cayenne pepper.
Place the mixture in a vessel over boiling water.
Beat with an egg beater until it thickens.
Gradually add the boiling water while beating continuously.
Cook until the sauce reaches the consistency of thick custard, about 5 to 7 minutes.
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
- Adds richness and fat, giving the sauce a smooth, silky mouthfeel.
- Egg yolks
- Emulsify with the butter and set into a thick, custard-like texture when heated.
- Lemon juice
- Adds acidity that brightens the sauce and balances the richness of the butter.
- Boiling water
- Loosens the mixture and helps the yolks cook gently into a smooth, pourable sauce.
The step that matters
Cook over boiling water while beating continuously. Egg yolks thicken through gentle heat, but overheating scrambles them. Constant beating and adding water gradually keeps the heat even so the sauce thickens smoothly rather than 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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