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 one at a time, mixing well.
Stir in the lemon juice, cayenne pepper, and salt.
Place the mixture in a saucepan over boiling water or on top of a kettle.
Beat continuously until it begins to thicken.
Gradually add the boiling water while beating constantly.
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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Lemon + eggtop 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).
Lemon and egg 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 set into a thick, silky sauce when gently heated.
- Butter
- Provides fat that, emulsified with the yolks, gives the sauce its rich body.
- Lemon juice
- Adds acidity that brightens the rich butter and helps stabilise the emulsion.
- Boiling water
- Adds moisture and gentle heat that loosens the sauce and helps it thicken smoothly.
The step that matters
Beat continuously until it begins to thicken. Egg yolks scramble if they get too hot or sit still over heat. Constant beating spreads the heat evenly and keeps the yolks emulsified with the butter, so the sauce thickens smoothly instead of 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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