Why it works: Pepper and lemon 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
Make the sauce
Cream the butter in a bowl.
Add the flour, salt, and pepper or paprika, and mix well.
Stir in the lemon juice or tarragon vinegar.
Slowly add the boiling water while stirring until the mixture thickens.
Remove from heat and stir in the beaten egg yolks.
Serve
Serve from a sauce boat.
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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Pepper + lemontop 3% of all pairsAroma overlapstrongMentioned together27,047 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
-
Butter + flourtop 12% of all pairsAroma overlaplowMentioned together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Flour + eggtop 15% of all pairsAroma overlaplowMentioned together106,462 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Butter + lemontop 16% of all pairsAroma overlapmoderateMentioned together41,227 recipes
Shared aroma: 3-hexenal (apple, fruity).
-
Flour + lemontop 17% of all pairsAroma overlapmoderateMentioned together30,404 recipes
Shared aroma: isobutyraldehyde (malty, green).
Butter and flour share little aroma chemistry, yet 124,287 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 and richness, giving the sauce a smooth, silky mouthfeel.
- Flour
- Thickens the sauce early on, helping it hold together when the liquid is added.
- Egg yolks
- Emulsify and thicken the sauce as they set gently, giving body and richness.
- Lemon juice or tarragon vinegar
- Adds acidity that cuts the richness and brightens the buttery flavour.
The step that matters
Stir in the beaten egg yolks off the heat. Egg yolks set at low temperatures and can scramble if the sauce is too hot. Removing the pan from heat before adding them lets them thicken gently and keeps the sauce smooth.
“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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