Why it works: Olive and onion are a kitchen classic. They rank in the top 8% of all ingredient pairs, and cooks put them together in 29,779 recipes. Both carry 2,4-decadienal, which smells seaweed. The science ↓
Bearnaise Sauce
Ingredients
Directions
Make the emulsion
Beat the egg yolks until very light.
Gradually add the stock and olive oil while stirring continuously.
Place over low heat and stir constantly until the mixture thickens.
Finish and serve
Remove from heat, add seasoning, and mix well.
Allow to cool 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 their aromas overlap, and how often cooks already put them together.
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Olive + oniontop 8% of all pairsSmell alikemoderateCooked together29,779 recipes
Shared aroma: 2,4-decadienal (seaweed).
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Vinegar + olivetop 10% of all pairsSmell alikemoderateCooked together12,297 recipes
Shared aroma: isoamyl acetate (banana, fruity).
-
Onion + peppertop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Olive + peppertop 11% of all pairsSmell alikemoderateCooked together30,263 recipes
Shared aroma: 2,4-decadienal (seaweed).
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Vinegar + oniontop 14% of all pairsSmell alikemoderateCooked together18,226 recipes
Shared aroma: acetic acid (sour, vinegar).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Egg yolks
- Their proteins emulsify the oil and thicken the sauce when gently heated.
- Olive oil
- Adds fat and richness, forming the emulsion with the yolks for a smooth texture.
- Vinegar
- Adds acidity that sharpens the flavour and balances the richness of the yolks and oil.
- White stock
- Adds liquid that loosens the emulsion and contributes savoury flavour.
The step that matters
Thickening over low heat. Egg yolks set when they get too hot, so the sauce can curdle or scramble. Low heat and constant stirring let the yolks thicken gradually and hold the emulsion together.
Swap the onion
How well each one fits the dish's main ingredients (egg, vinegar, olive, pepper):
- Capsicumfits better
- Cucumberfits better
- Tomatofits better
- Onionthe original
Fit is the average pairing score against egg, vinegar, olive, pepper. Candidates are from the same food group and used in at least 100 recipes.
“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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