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
Prepare
Fill a bowl with hot water, then pour it out and wipe the bowl dry.
Make the sauce
Add the butter to the bowl and beat until soft and creamy.
Add the egg yolks one by one, beating until blended with the butter.
Stir in the lemon juice, salt, and cayenne pepper, and beat until smooth.
Remove the spoon and beat the mixture with an egg beater for five minutes.
Place the bowl over a double boiler with boiling water.
Add the boiling water to the butter and egg mixture and cook until thickened like mayonnaise, beating constantly.
Serve
Serve hot or cold.
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 a smooth, creamy body to the emulsion.
- Egg yolks
- Emulsify the butter and thicken the sauce as they heat.
- Lemon juice
- Adds acidity that brightens the flavour and balances the richness.
- Boiling water
- Adds moisture and heat that helps the sauce thicken to a mayonnaise-like consistency.
The step that matters
Cooking the sauce over a double boiler while beating constantly. Egg yolks thicken at moderate heat but scramble if overheated. Constant beating keeps the emulsion smooth and evenly heated, so the sauce thickens without 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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