Why it works: Butter and flour are a kitchen classic. They rank in the top 12% of all ingredient pairs, and cooks put them together in 124,287 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓
Asparagus a LA Frangaise
Ingredients
Directions
Prepare the asparagus
Bring a pot of water to a boil and add salt and baking soda.
Add the asparagus and cook for 10 to 12 minutes until tender.
Drain the asparagus and spread it on a clean cloth to dry.
Make the sauce and serve
Melt the butter in a clean saucepan over medium heat.
Add the asparagus and sauté for 8 to 10 minutes, shaking the pan often.
Sprinkle in the flour and sugar, then pour in boiling water to nearly cover the asparagus.
Boil rapidly until little liquid remains.
Stir in the beaten egg yolks and serve hot, ensuring the sauce adheres to the asparagus.
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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Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Asparagus + flourtop 12% of all pairsSmell alikemoderateCooked together936 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Flour + sugartop 15% of all pairsSmell alikemoderateCooked together92,116 recipes
Shared aroma: phenylacetaldehyde (hawthorne, honey).
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Flour + eggtop 15% of all pairsSmell alikelowCooked together106,462 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Asparagus + eggtop 17% of all pairsSmell alikemoderateCooked together1,338 recipes
Shared aroma: 2-nonenal (fatty, 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
- Asparagus
- The main vegetable, cooked until tender and then finished in the buttery sauce.
- Butter
- Adds fat and richness, carrying flavour through the sauce and coating the asparagus.
- Flour
- Thickens the cooking liquid so the sauce can cling to the asparagus.
- Egg yolks
- Enrich and thicken the sauce as they set gently with the hot liquid.
The step that matters
Stir in the egg yolks gently. Egg yolks thicken when heated but can scramble if the liquid is too hot or boiling when they are added. Stirring them in off the boil and serving promptly keeps the sauce smooth and clinging to the asparagus.
Swap the asparagus
How well each one fits the dish's main ingredients (butter, flour, sugar, egg):
- Chivefits about as well
- Leekfits about as well
- Shallotfits about as well
- Asparagusthe original
Fit is the average pairing score against butter, flour, sugar, egg. 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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