Why it works: Pepper and parsley match in chemistry and in kitchens. They rank in the top 2% of all ingredient pairs, and cooks put them together in 34,122 recipes. Both carry 4'-methylacetophenone, which smells bitter almond. The science ↓
Dried Bean Soup
Ingredients
Directions
Prepare the beans
Parboil the beans with 2 quarts of water and 1 teaspoon of baking soda for 20 minutes.
Strain through a colander and rinse with several waters.
Boil the beans in 4 quarts of water until tender, about 3 hours.
Add celery in the last hour.
Make the soup
Cook the onion and drippings in a stewpan for 30 minutes.
Drain the beans, saving the cooking water.
Add the drained beans to the stewpan with the onion.
Stir in 3 tablespoons of flour.
Cook for another 30 minutes, stirring often.
Gradually add the reserved bean cooking water until the mixture is like thick cream.
Rub through a puree strainer.
Add salt and pepper.
Cook for an additional 20 minutes.
Finish and serve
If desired, stir in the beaten yolks of 2 eggs.
Serve.
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.
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Pepper + parsleytop 2% of all pairsSmell alikestrongCooked together34,122 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Milk + buttertop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
-
Beans + oniontop 7% of all pairsSmell alikestrongCooked together5,242 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Beans + parsleytop 8% of all pairsSmell alikestrongCooked together1,376 recipes
Shared aroma: linalool (floral, citrus).
-
Onion + parsleytop 9% of all pairsSmell alikemoderateCooked together25,843 recipes
Shared aroma: 2,4-decadienal (seaweed).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Dried beans
- Form the main body of the soup and, once cooked and pureed, give it its thick texture.
- Onion
- Adds savory sweetness and aroma as it softens in the drippings.
- Flour
- Thickens the soup as its starch absorbs liquid during cooking.
- Drippings or lard
- Carries flavor and fat, helping the onion cook and the soup feel rich.
- Baking soda
- Raises the cooking water's alkalinity, helping the bean skins soften.
- Milk
- Adds creaminess and mild sweetness to the finished soup.
The step that matters
Gradually add the reserved bean cooking water. Flour thickens by absorbing liquid, and adding the liquid slowly while stirring lets each starch granule hydrate evenly, preventing lumps and giving a smooth, thick cream.
Swap the parsley
The recipe marks parsley as optional. How well each one fits the dish's main ingredients (beans, onion, flour, pepper, milk, butter, egg):
- Parsleythe original
- Turmericfits about as well
- Nutmegfits about as well
- Capersfits about as well
Fit is the average pairing score against beans, onion, flour, pepper, milk, butter, egg. 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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