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 the base
Beat the butter until creamy.
Add the egg yolks one at a time, mixing well.
Stir in the lemon juice, cayenne pepper, and salt, beating thoroughly.
Cook and thicken
Place the bowl with the mixture over a saucepan of boiling water.
Beat with an egg beater until it begins to thicken, about 1 minute.
Gradually add the boiling water while continuing to beat.
Stir until the sauce thickens to a soft custard consistency.
Continue stirring for a few minutes after removing from heat.
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 with the butter and set into a soft custard as they heat.
- Butter
- Provides fat that, emulsified with the yolks, gives the sauce its rich body.
- Lemon juice
- Adds acidity that balances the richness and helps keep the emulsion stable.
The step that matters
Adding the boiling water gradually while beating. Egg yolks can scramble if heated too quickly. Gradual additions of hot liquid and constant beating keep the heat even, so the yolks thicken smoothly into an emulsified custard 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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