Why it works: Lettuce and flour match in chemistry and in kitchens. They rank in the top 8% of all ingredient pairs, and 1,205 recipes mention both. Both carry isobutyraldehyde, which smells malty, green. The science ↓
The recipe
Ingredients
Contains: egg, milk, wheat (auto-detected from the ingredients and method; we can miss things, so check labels)
Directions
Prepare the lettuce
Wash the lettuce and tie it with string to keep the leaves together.
Boil water in a pot, add salt, and cook the lettuce until tender.
Remove the lettuce and press gently to squeeze out excess water.
Make the sauce
In a saucepan, melt the butter and mix in the flour.
Gradually add the cream or milk, stirring until smooth.
Add the lettuce, a pinch of salt, nutmeg, and sugar to the sauce.
Let it boil for 10 minutes.
Remove the lettuce, stir in the beaten egg yolks, and serve.
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 aroma chemistry they share, and how many recipes mention both.
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Lettuce + flourtop 8% of all pairsAroma overlapstrongMentioned together1,205 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Butter + creamtop 3% of all pairsAroma overlapstrongMentioned together41,494 recipes
Shared aroma: delta-dodecalactone (sweet, creamy).
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Cream + sugartop 5% of all pairsAroma overlapmoderateMentioned together43,437 recipes
Shared aroma: 2,3-butanedione (butter, sweet).
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Flour + nutmegtop 6% of all pairsAroma overlapmoderateMentioned together18,411 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Cream + nutmegtop 6% of all pairsAroma overlapmoderateMentioned together7,917 recipes
Shared aroma: acetic acid (sour, vinegar).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Lettuce
- Becomes the tender vegetable base that absorbs the sauce and gives the dish its body.
- Butter
- Adds fat and richness, and carries flavour into the sauce.
- All-purpose flour
- Thickens the butter and cream into a smooth sauce as it cooks.
- Cream or rich milk
- Forms the liquid base of the sauce and adds richness and body.
- Egg yolks
- Enrich and thicken the sauce, adding smoothness and a silky texture.
- Sugar
- Adds sweetness that balances the savoury salt and nutmeg.
The step that matters
Stir in the beaten egg yolks off the heat. Egg yolks thicken by gentle heat, but if the sauce is too hot they can scramble into grainy specks. Removing the lettuce first and stirring steadily keeps the sauce smooth and creamy.
Flavor stand-ins for the nutmeg
How well each one fits the dish's main ingredients (lettuce, butter, flour, cream, sugar, egg):
- Nutmegthe original
- Cinnamonabout as good a flavor fit
Fit is the average pairing score against lettuce, butter, flour, cream, sugar, egg. Candidates are from the same food group and used in at least 100 recipes. This compares flavor only: it does not check the job the ingredient does in the dish (bulk, moisture, acidity, structure).
“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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