Why it works: Spinach and asparagus match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 274 recipes. Both carry 2-methoxy-4-vinylphenol, which smells clove, smoky. The science ↓
Asparagus Soup
Ingredients
Directions
In a pot, combine the broiled bone, peas, and enough water to cover.
Add the celery, sweet herbs, onion, cayenne pepper, and salt.
Boil briskly for 5 hours.
Strain the mixture and pulp the solids.
Stir in a little spinach juice and the boiled asparagus pieces.
Add walnut soy and mushroom catsup for flavor.
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.
-
Spinach + asparagustop 1% of all pairsSmell alikestrongCooked together274 recipes
Shared aroma: 2-methoxy-4-vinylphenol (clove, smoky).
-
Peas + asparagustop 4% of all pairsSmell alikestrongCooked together808 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Celery + peppertop 5% of all pairsSmell alikestrongCooked together16,012 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Celery + spinachtop 5% of all pairsSmell alikestrongCooked together616 recipes
Shared aroma: 2-methoxy-4-vinylphenol (clove, smoky).
-
Walnut + celerytop 6% of all pairsSmell alikestrongCooked together852 recipes
Shared aroma: alpha-pinene (pine, turpentine).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Peas
- Provide the main body and thickness of the soup as they break down during boiling.
- Asparagus
- Adds the characteristic green vegetable flavor and pieces for texture in the finished soup.
- Onion
- Builds a savory aromatic base as it softens and flavors the long-simmered broth.
- Mushroom catsup
- Adds deep savory, umami flavor to the soup.
The step that matters
Boil briskly for 5 hours. A long, vigorous boil extracts flavor from the bone and vegetables and breaks down the peas, but the water level must be maintained so the pot does not boil dry and scorch.
Swap the walnut
How well each one fits the dish's main ingredients (peas, celery, onion, pepper, spinach, asparagus, mushroom):
- Beansfits better
- Lentilsfits better
- Sesamefits better
- Walnutthe original
Fit is the average pairing score against peas, celery, onion, pepper, spinach, asparagus, mushroom. 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.
You might also like
The free Flavor Lab newsletter: one surprising pairing a week and the molecular reason it works, in 60 seconds. No spam, unsubscribe anytime.
Prefer an account? Create a free account to save pairings and unlock the full chemistry.

Green Peas229 recipes
Cream of Celery Soup113 recipes
Asparagus Salad77 recipes
Mushroom Soup60 recipes