Why it works: Lettuce and beans match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 500 recipes. Both carry 2-isobutyl-3-methoxypyrazine, which smells green bell pepper, earthy. The science ↓
Green Peas Soup
Ingredients
Directions
Shell the peas, reserving ½ pint of the best for later.
Wash the shells and boil them in enough water to cover, adding ½ teaspoon of carbonate of soda for 30 minutes.
Rub the boiled shells through a fine colander.
In another pan, combine the remaining peas, onions, lettuces, and bread with 1 quart of water and boil until soft.
Rub this mixture through the colander and combine with the shell liquid.
Mix the butter and flour, then stir into the soup, seasoning with salt and pepper.
Boil the reserved peas in a little water with a pinch of carbonate of soda, then add to the tureen and pour the soup over them.
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.
-
Lettuce + beanstop 1% of all pairsSmell alikestrongCooked together500 recipes
Shared aroma: 2-isobutyl-3-methoxypyrazine (green bell pepper, earthy).
-
Peas + minttop 2% of all pairsSmell alikemoderateCooked together1,137 recipes
Shared aroma: 1-octen-3-ol (mushroom, earthy).
-
Lettuce + parsleytop 5% of all pairsSmell alikestrongCooked together1,483 recipes
Shared aroma: trans-2-hexenal (green, leafy).
-
Peas + beanstop 5% of all pairsSmell alikestrongCooked together949 recipes
Shared aroma: 2-isobutyl-3-methoxypyrazine (green bell pepper, earthy).
-
Peas + lettucetop 5% of all pairsSmell alikestrongCooked together1,293 recipes
Shared aroma: 2-isobutyl-3-methoxypyrazine (green bell pepper, earthy).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
Swap the mint
How well each one fits the dish's main ingredients (peas, onion, lettuce, parsley, beans, butter, flour):
- Capersfits better
- Tarragonfits better
- Cuminfits better
- Mintthe original
Fit is the average pairing score against peas, onion, lettuce, parsley, beans, butter, flour. Candidates are from the same food group and used in at least 100 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.

Indian Spiced Potato Soup with Tofu and Spinach448 recipes
Clear Carrot and Bottle Gourd Soup65 recipes
Mock Bisque Soup51 recipes
Cream of Asparagus Soup42 recipes