Why it works: Lemon and parsley match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 14,037 recipes. Both carry beta-phellandrene, which smells minty, terpene. The science ↓
Sauce Velout&
Ingredients
Directions
Make the sauce
In a saucepan, melt the butter over medium heat.
Stir in the flour until pale yellow.
Gradually add the stock, stirring until smooth.
Remove from heat and stir in the egg yolks.
Season and serve
If keeping warm, place over hot water without boiling.
Add salt, pepper, lemon juice, and parsley.
If using onion, strain the sauce 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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Lemon + parsleytop 1% of all pairsSmell alikestrongCooked together14,037 recipes
Shared aroma: beta-phellandrene (minty, terpene).
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Pepper + parsleytop 2% of all pairsSmell alikestrongCooked together34,122 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
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Pepper + lemontop 3% of all pairsSmell alikestrongCooked together27,047 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
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Parsley + oniontop 9% of all pairsSmell alikemoderateCooked together25,843 recipes
Shared aroma: 2,4-decadienal (seaweed).
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Pepper + oniontop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Egg yolks
- Enrich the sauce and thicken it gently as it warms, adding richness and body.
- Butter
- Forms the fat base of the roux and adds richness and flavour.
- Flour
- Thickens the stock by forming a roux with the melted butter.
- Stock
- Provides the liquid base that the roux thickens into a smooth sauce.
The step that matters
Keep the sauce below boiling after adding the egg yolks. Egg yolks coagulate and can curdle or scramble if overheated, so the sauce should be held over hot water rather than on direct heat once the yolks go in.
Swap the onion
The recipe marks onion as optional. How well each one fits the dish's main ingredients (egg, butter, flour, pepper, lemon, parsley):
- Shallotfits better
- Chivefits better
- Spinachfits better
- Onionthe original
Fit is the average pairing score against egg, butter, flour, pepper, lemon, parsley. 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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