Why it works: Turnip and leek match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 1,046 recipes. Both carry coumarin, which smells sweet, hay. The science ↓
Spring Soup
Ingredients
Directions
Prepare the soup
Chop equal quantities of carrots, turnips, onions, and leeks.
Stew the chopped vegetables in good stock.
Add French beans, peas, bean cucumbers, asparagus tops, lettuces, sorrel, and chervil.
Stir in 1 teaspoon of white sugar and let the mixture reduce to a glaze.
Thicken and serve
Thicken some stock with green peas rubbed through a fine sieve.
Strain the vegetables from the thickened stock and serve with asparagus tops in the soup.
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.
-
Turnip + leektop 1% of all pairsSmell alikestrongCooked together1,046 recipes
Shared aroma: coumarin (sweet, hay).
-
Carrot + turniptop 1% of all pairsSmell alikestrongCooked together8,002 recipes
Shared aroma: coumarin (sweet, hay).
-
Leek + asparagustop 1% of all pairsSmell alikestrongCooked together73 recipes
Shared aroma: 1-octen-3-ol (mushroom, earthy).
-
Beans + asparagustop 1% of all pairsSmell alikestrongCooked together292 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Turnip + asparagustop 2% of all pairsSmell alikestrongCooked together328 recipes
Shared aroma: coumarin (sweet, hay).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Carrots, turnips, onions, and leeks
- Form the flavour base of the soup as they stew in stock.
- Green peas
- Rubbed through a sieve, they thicken the stock and give it body.
- Asparagus tops
- Add delicate green flavour and tender texture to the finished soup.
- White sugar
- Adds sweetness and helps the mixture reduce to a glaze with gentle browning.
The step that matters
Reducing the mixture to a glaze. Sugar and liquid reduce together, and if the heat is too high the sugar can scorch and turn bitter before the glaze forms. Gentle heat lets the sugars concentrate evenly.
Swap the onion
How well each one fits the dish's main ingredients (carrot, turnip, leek, beans, peas, cucumber, asparagus):
- Lettucefits better
- Beetrootfits better
- Cauliflowerfits better
- Onionthe original
Fit is the average pairing score against carrot, turnip, leek, beans, peas, cucumber, asparagus. 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.
More spring vegetable soup recipes
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
Asparagus Soup179 recipes
Carrot Soup134 recipes
Asparagus Salad77 recipes