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
In a bowl, cream the butter until smooth.
Add the egg yolks one at a time, mixing well after each addition.
Season with lemon juice, onion juice, salt, and cayenne pepper before adding the next yolk.
Slowly add the boiling water while mixing.
Place the bowl over a pan of boiling water and beat the sauce until it thickens to a creamy consistency, avoiding boiling.
Continue to beat for a few minutes after removing from heat before serving.
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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Onion + peppertop 11% of all pairsAroma overlapmoderateMentioned together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Butter + oniontop 15% of all pairsAroma overlapmoderateMentioned together42,912 recipes
Shared aroma: decanal (soap, orange peel).
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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).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Butter
- Provides fat and richness, giving the sauce its smooth, creamy body.
- Egg yolks
- Emulsify the butter and water and thicken the sauce as they gently cook.
- Lemon juice
- Adds acidity that brightens the rich butter and helps keep the sauce balanced.
The step that matters
Beat over gently simmering water, not boiling. Egg yolks thicken through gentle heat and can scramble or curdle if they get too hot. Keeping the water below a boil lets the yolks thicken slowly while the butter emulsifies into a smooth sauce.
Flavor stand-ins for the onion
How well each one fits the dish's main ingredients (butter, egg, lemon, pepper):
- Asparagusbetter flavor fit
- Capsicumbetter flavor fit
- Spinachbetter flavor fit
- Onionthe original
Fit is the average pairing score against butter, egg, lemon, pepper. Candidates are from the same food group and used in at least 100 recipes. This compares flavor only: it does not check the job the ingredient does in the dish (bulk, moisture, acidity, structure).
“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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