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 Francaise
Ingredients
Directions
Prepare the asparagus
Boil a large pot of water with salt and a few grains of 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
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 yolks of the eggs.
Serve
Serve the asparagus hot, heaped on a dish with the sauce adhering.
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).
-
Flour + eggtop 15% of all pairsSmell alikelowCooked together106,462 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
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
- Is the main vegetable, cooked until tender and then finished in the butter sauce.
- Butter
- Provides fat and richness, carrying flavour into the sauce and coating the asparagus.
- Flour
- Thickens the cooking liquid so the sauce clings to the asparagus.
- Eggs
- Their beaten yolks enrich and thicken the sauce as it sets.
The step that matters
Stir in the beaten yolks of the eggs. Egg yolks thicken when heated gently; if the sauce is too hot or boiled after adding them, they can scramble and turn grainy instead of smooth and creamy.
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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