Why it works: Butter and lemon are a kitchen classic. They rank in the top 16% of all ingredient pairs, and 41,227 recipes mention both. Both carry 3-hexenal, which smells apple, fruity. The science ↓
Hollandaise Sauce
Ingredients
Directions
Make the sauce
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.
Just before serving, add the boiling water.
Cook and serve
Cook over boiling water, stirring until the mixture thickens to a custard‑like consistency.
Serve immediately with cauliflower, asparagus tips, or fish.
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.
-
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).
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 fat that gives the sauce a smooth, silky body.
- Egg yolks
- Emulsify the butter and thicken into a custard as they gently heat.
- Lemon juice
- Adds acidity that brightens the rich butter and egg yolks.
- Boiling water
- Adds moisture that loosens the sauce and helps keep it smooth.
The step that matters
Cook gently over boiling water while stirring. Egg yolks thicken as they warm, but if the heat is too high they scramble and the sauce curdles. Constant stirring keeps the heat even so the mixture thickens smoothly into a custard.
Flavor stand-ins for the lemon
How well each one fits the dish's main ingredients (butter, egg):
- Lemonthe original
- Vanillaabout as good a flavor fit
- Coconutabout as good a flavor fit
Fit is the average pairing score against butter, egg. 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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