Why it works: Pepper and asparagus are a kitchen classic. They rank in the top 10% of all ingredient pairs, and cooks put them together in 1,968 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
German Asparagus Soup
Ingredients
Directions
Prepare the soup
Prepare 2 quarts of white soup from bones or fresh meat.
Season the soup with salt and pepper.
Thicken the soup with flour mixed in milk until it reaches a cream‑like consistency.
Add the asparagus
Cut the green parts of the asparagus into ¾‑inch pieces.
Add the asparagus to the saucepan and boil until tender, but do not overcook.
Finish with egg yolks
For a richer soup, mix the yolks of 3 eggs with a little milk.
Remove the soup from heat for 1–2 minutes before adding the egg mixture.
Do not allow the soup to boil after adding the eggs.
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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Pepper + asparagustop 10% of all pairsSmell alikemoderateCooked together1,968 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Flour + asparagustop 12% of all pairsSmell alikemoderateCooked together936 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Flour + milktop 14% of all pairsSmell alikelowCooked together78,219 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Meat + asparagustop 15% of all pairsSmell alikemoderateCooked together142 recipes
Shared aroma: 1-octen-3-one (mushroom, metallic).
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Flour + eggtop 15% of all pairsSmell alikelowCooked together106,462 recipes
Shared aroma: isobutyraldehyde (malty, green).
Flour and milk barely smell alike, yet cooks put them together in 78,219 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 soup into a cream-like consistency as it cooks.
- Asparagus
- Provides the main vegetable flavour and tender texture in the soup.
- Egg yolks
- Enrich the soup and give it a silkier, thicker body.
The step that matters
Add the egg yolks off the heat and do not boil. Egg yolks begin to set and can curdle when overheated, so the soup must be removed from heat before they are added and kept below boiling afterward.
Swap the asparagus
How well each one fits the dish's main ingredients (meat, pepper, flour, milk, egg):
- Capsicumfits about as well
- Asparagusthe original
- Potatofits about as well
- Spinachfits about as well
Fit is the average pairing score against meat, pepper, flour, milk, 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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