Why it works: Cucumber and peas match in chemistry and in kitchens. They rank in the top 3% of all ingredient pairs, and 629 recipes mention both. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
The recipe
Ingredients
Contains: egg, milk, wheat (auto-detected from the ingredients and method; we can miss things, so check labels)
Directions
Make the base
Fry the vegetables and herbs slightly in butter, cutting the cucumber and carrots into pea shapes.
After 10 minutes, remove the vegetables and stir in flour, then add the stock and stir until thickened; strain.
Finish and serve
Mix the eggs and cream, move the pot off the heat, and stir in the egg and cream mixture until thickened; do not let it boil.
Add the tarragon and cooked vegetables to the soup, along with the lemon juice, 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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Cucumber + peastop 3% of all pairsAroma overlapstrongMentioned together629 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Butter + creamtop 3% of all pairsAroma overlapstrongMentioned together41,494 recipes
Shared aroma: delta-dodecalactone (sweet, creamy).
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Carrot + peastop 4% of all pairsAroma overlapstrongMentioned together2,994 recipes
Shared aroma: 2-isobutyl-3-methoxypyrazine (green bell pepper, earthy).
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Carrot + cucumbertop 5% of all pairsAroma overlapstrongMentioned together1,214 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Cream + sugartop 5% of all pairsAroma overlapmoderateMentioned together43,437 recipes
Shared aroma: 2,3-butanedione (butter, sweet).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Egg yolks
- Thicken the soup as they set gently with heat, giving it a smooth, rich body.
- Butter
- Carries the herbs and vegetables' flavour and gives the base a rich, fatty mouthfeel.
- Flour
- Thickens the stock into a smooth base when cooked with butter and liquid.
- Cream
- Adds richness and a soft, smooth texture to the finished soup.
- Lemon juice
- Adds acidity that brightens the flavour and balances the richness of the cream and yolks.
The step that matters
Adding the egg and cream mixture. Egg yolks thicken by gentle heat. If the soup boils after they go in, they can scramble and curdle, leaving the texture grainy instead of smooth.
Flavor stand-ins for the carrot
How well each one fits the dish's main ingredients (flour, butter, cream, sugar, egg, cucumber, peas):
- Asparagusbetter flavor fit
- Cauliflowerbetter flavor fit
- Potatobetter flavor fit
- Carrotthe original
Fit is the average pairing score against flour, butter, cream, sugar, egg, cucumber, peas. 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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