Why it works: Tarragon and parsley match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 1,563 recipes. Both carry estragole, which smells anise, licorice. The science ↓
Mayonnaise
Ingredients
Directions
Prepare the yolk
In a bowl, break the egg yolk and stir it with a wooden spoon.
Add salt, pepper, and vinegar.
Whisk in the oil
Slowly add the Lucca oil drop by drop while stirring continuously until thick.
Mix in the white vinegar and tarragon vinegar.
Make the panada and finish
In a separate pan, melt the butter and stir in the flour to make a panada.
Gradually add the milk and stir until boiling.
Mix in the stock, vinegar, sugar, mustard, and cream until smooth.
Serve
Serve the mayonnaise over the fish, garnished with parsley or tarragon.
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.
Photo for illustrative purposes only · Contact us to use it
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.
-
Tarragon + parsleytop 1% of all pairsSmell alikestrongCooked together1,563 recipes
Shared aroma: estragole (anise, licorice).
-
Tarragon + mustardtop 1% of all pairsSmell alikestrongCooked together901 recipes
Shared aroma: methyleugenol (clove, spice).
-
Pepper + parsleytop 2% of all pairsSmell alikestrongCooked together34,122 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Pepper + tarragontop 5% of all pairsSmell alikestrongCooked together2,399 recipes
Shared aroma: estragole (anise, licorice).
-
Vinegar + tarragontop 7% of all pairsSmell alikemoderateCooked together2,547 recipes
Shared aroma: isobutyraldehyde (malty, green).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Egg yolk
- Emulsifier that holds the oil and vinegar together in a stable, thick sauce.
- Lucca oil
- Supplies the fat that gives the sauce its body and rich texture.
- Vinegar
- Adds acidity that sharpens flavour and helps stabilise the emulsion.
- Cream
- Adds richness and softens the texture of the finished sauce.
- Stock
- Adds savoury depth and thins the sauce slightly.
The step that matters
Adding the oil drop by drop. Oil must be added slowly while stirring so each droplet is broken into the yolk and emulsified. Adding it too fast overwhelms the yolk, and the mayonnaise separates and stays runny instead of thickening.
Swap the parsley
How well each one fits the dish's main ingredients (egg, pepper, vinegar, tarragon, sugar, mustard, cream):
- Capersfits better
- Dillfits about as well
- Celeryfits about as well
- Parsleythe original
Fit is the average pairing score against egg, pepper, vinegar, tarragon, sugar, mustard, cream. 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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