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
Wash the butter in cold water using a spoon.
Divide the butter into three pieces and place one piece in a saucepan with the egg yolks and lemon juice.
Place the saucepan in a larger one containing boiling water and stir constantly until the butter melts.
As the sauce thickens, add the second piece of butter, then the third piece.
Add boiling water and cook for one minute.
Remove from heat and stir in salt and cayenne.
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 gives the sauce its rich texture and smooth body when emulsified.
- Egg yolks
- Act as emulsifiers and thicken the sauce as they gently cook with the butter.
- Lemon juice
- Adds acidity that brightens the flavour and helps stabilise the emulsion.
The step that matters
Adding the butter and heating over boiling water. Egg yolks thicken only when heated gently; if the heat is too high they scramble, and if butter is added too fast the emulsion can break and the sauce turns greasy or separated.
“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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