Why it works: Lemon and pepper match in chemistry and in kitchens. They rank in the top 3% of all ingredient pairs, and cooks put them together in 27,047 recipes. Both carry trans-2-nonenal, which smells cardboard, fatty. The science ↓
Caper Sauce
Ingredients
Directions
Melt the butter in a saucepan.
Add the flour and cook until frothing.
Gradually add the milk or fish stock, stirring until thick.
Remove from heat and stir in the beaten egg yolks.
Season with lemon juice, salt, and pepper.
Finally, add the capers and mix well.
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.
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Lemon + peppertop 3% of all pairsSmell alikestrongCooked together27,047 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
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Lemon + caperstop 5% of all pairsSmell alikestrongCooked together1,222 recipes
Shared aroma: coumarin (sweet, hay).
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Flour + caperstop 6% of all pairsSmell alikestrongCooked together1,024 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Butter + milktop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
Butter and flour barely smell alike, yet cooks put them together in 124,287 recipes: they 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
- Flour
- Thickens the butter and liquid into a smooth, stable sauce body.
- Egg yolks
- Enrich the sauce with richness and body once stirred in off the heat.
- Butter
- Provides fat for richness and carries the flour into a roux.
- Milk or fish stock
- Forms the liquid base that the flour thickens into the sauce.
The step that matters
Stir in the egg yolks off the heat. Egg yolks thicken through gentle heat and can scramble if the sauce is too hot. Removing the pan from the heat before adding them lets the yolks enrich the sauce smoothly without curdling.
Swap the capers
How well each one fits the dish's main ingredients (butter, flour, milk, egg, lemon, pepper):
- Parsleyfits better
- Nutmegfits better
- Cardamomfits better
- Capersthe original
Fit is the average pairing score against butter, flour, milk, egg, lemon, 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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