Why it works: Tarragon and vinegar are a kitchen classic. They rank in the top 4% of all ingredient pairs, and 1,299 recipes mention both. Both carry isobutyraldehyde, which smells malty, green. The science ↓
Bearnaise Sauce
Ingredients
Directions
Beat the egg yolks in a double boiler, then add the salad oil and hot water.
Cook until the mixture thickens, stirring constantly.
Remove from heat and add salt, vinegar, and paprika or cayenne.
For a richer sauce, substitute butter for oil: cream 3 tablespoons of butter and cook with the egg yolks, omitting the hot water.
Once thick, remove from heat and stir in 2 more tablespoons of creamed butter and seasonings.
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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Tarragon + vinegartop 4% of all pairsAroma overlapmoderateMentioned together1,299 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Egg + buttertop 8% of all pairsAroma overlapstrongMentioned together118,511 recipes
Shared aroma: nonanal (fat, citrus).
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Tarragon + buttertop 10% of all pairsAroma overlapmoderateMentioned together1,193 recipes
Shared aroma: anethole (sweet, anise).
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Egg + tarragontop 13% of all pairsAroma overlaplowMentioned together1,054 recipes
Shared aroma: 2-methylbutyraldehyde (malty, chocolate).
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Vinegar + buttertop 14% of all pairsAroma overlapmoderateMentioned together13,453 recipes
Shared aroma: isoamyl acetate (banana, pear).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Egg yolks
- Emulsify and thicken the sauce as they cook gently with the oil.
- Salad oil
- Provides fat that is emulsified into the yolks for a smooth, rich texture.
- Butter
- Adds richness and flavor, giving a creamier body when used in place of oil.
The step that matters
Cook until the mixture thickens, stirring constantly. Egg yolks set and thicken with gentle heat, but overheating scrambles them. Constant stirring over a double boiler keeps the heat even so the sauce becomes smooth rather than curdled.
Flavor stand-ins for the tarragon
How well each one fits the dish's main ingredients (egg, vinegar, butter):
- Tarragonthe original
- Parsleyabout as good a flavor fit
Fit is the average pairing score against egg, vinegar, butter. 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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