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
Cream the butter in a bowl.
Add the egg yolks one at a time, beating well after each addition.
Stir in the lemon juice, salt, and cayenne pepper.
Gradually add the boiling water while stirring.
Place the bowl in a pan of boiling water and stir until thickened.
Remove immediately to prevent curdling.
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 fat that makes the sauce rich and gives it a smooth, silky body.
- Egg yolks
- Their proteins set gently with heat, thickening the sauce and holding it together as an emulsion.
- Lemon juice
- Adds acidity that brightens the flavour and helps balance the richness of the butter.
The step that matters
Thickening over boiling water. Egg yolks thicken from gentle heat, but if they get too hot they scramble and curdle. Keeping the heat moderate and removing the bowl as soon as it thickens protects the smooth texture.
“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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