Why it works: Butter and bread are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 27,232 recipes. Both carry delta-decalactone, which smells sweet, creamy. The science ↓
Pea Soup
Ingredients
Directions
Prepare the peas
Wash and soak the dried peas in cold water overnight.
Combine the soaked peas and 2 quarts of cold water in a pot.
Bring the mixture to a slow boil.
Simmer until the peas dissolve, adding water as needed to maintain 2 quarts of liquid.
Finish the soup
Once the peas are soft, strain the mixture through a colander.
Return the strained liquid to the pot.
If the soup is too thick, adjust the consistency with milk or water.
Bring the soup to a boil.
Stir in the flour and butter mixture until smooth.
Season with salt and pepper to taste.
Serve
Serve over slices of dried bread in a tureen.
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.
-
Butter + breadtop 7% of all pairsSmell alikemoderateCooked together27,232 recipes
Shared aroma: delta-decalactone (sweet, creamy).
-
Peas + breadtop 11% of all pairsSmell alikemoderateCooked together804 recipes
Shared aroma: hexyl acetate (fruity, apple).
-
Flour + buttertop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Peas + peppertop 15% of all pairsSmell alikemoderateCooked together5,331 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Pepper + breadtop 16% of all pairsSmell alikemoderateCooked together20,964 recipes
Shared aroma: 2-nonenal (fatty, green).
Flour and butter barely smell alike, yet cooks put them together in 124,287 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
- Dried split peas
- Break down during simmering to thicken the soup and give it body.
- Flour
- Thickens the soup when cooked with butter, giving it a smoother texture.
- Butter
- Combines with the flour to help make a smooth, rich thickening base.
The step that matters
Stir in the flour and butter mixture until smooth. Flour clumps if added directly to hot liquid. Blending it with butter first and stirring it in evenly lets the starch disperse and thicken the soup without lumps.
Swap the peas
How well each one fits the dish's main ingredients (flour, butter, pepper, bread):
- Almondfits better
- Chestnutfits better
- Beansfits better
- Peasthe original
Fit is the average pairing score against flour, butter, pepper, bread. 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 pea soup recipes
You might also like
Brown Bread461 recipes
Green Peas229 recipes
White Bread80 recipes
Bread Omelette60 recipesThe 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.