Why it works: Spinach and pepper are a kitchen classic. They rank in the top 6% of all ingredient pairs, and cooks put them together in 3,400 recipes. Both carry nonanal, which smells fat, citrus. The science ↓
Spinach Soup
Ingredients
Directions
Prepare the spinach
Wash the spinach.
Cook the spinach without adding water, adding the salt and sliced onion.
When the spinach is tender, mash the mixture through a strainer or puree sieve.
Make the soup
Scald the milk in a double boiler.
Melt the butter in a saucepan and stir in the flour until blended.
Stir the butter and flour mixture into the hot milk and cook for 10 minutes.
Add 1 cup of the spinach pulp and the egg yolk diluted with the cream.
Cook for an additional 10 minutes.
Season with salt and pepper to taste.
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.
Photo for illustrative purposes only · Contact us to use it
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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Spinach + peppertop 6% of all pairsSmell alikemoderateCooked together3,400 recipes
Shared aroma: nonanal (fat, citrus).
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Milk + buttertop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Spinach + oniontop 8% of all pairsSmell alikestrongCooked together3,336 recipes
Shared aroma: coumarin (sweet, hay).
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Butter + creamtop 8% of all pairsSmell alikemoderateCooked together41,516 recipes
Shared aroma: delta-dodecalactone (sweet, creamy).
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Spinach + flourtop 10% of all pairsSmell alikemoderateCooked together1,564 recipes
Shared aroma: isobutyraldehyde (malty, green).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Spinach
- Forms the body and green flavor of the soup as it cooks down into a pulp.
- Butter
- Enriches the soup and, with flour, forms the base that thickens the milk.
- Flour
- Thickens the milk by binding with butter into a roux that gives body.
- Milk
- Forms the liquid base of the soup, thickened by the roux.
- Egg yolk
- Adds richness and helps thicken and smooth the soup when cooked gently.
- Cream
- Adds fat and richness, giving the soup a smoother, fuller texture.
The step that matters
Adding the egg yolk and cream. Egg yolk can curdle or scramble if it meets very hot liquid. Diluting it with cream first and keeping the soup at a gentle heat helps it thicken smoothly without turning grainy.
Swap the onion
How well each one fits the dish's main ingredients (spinach, milk, butter, flour, egg, cream, pepper):
- Asparagusfits better
- Chivefits better
- Potatofits better
- Onionthe original
Fit is the average pairing score against spinach, milk, butter, flour, egg, cream, pepper. 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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