Why it works: Bread and butter 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 ↓
Bean Croquettes
Ingredients
Directions
Prepare the mixture
Mash the boiled beans in a bowl.
Add chopped onion, salt, and pepper to the beans.
Mix in enough bread crumbs to form a stiff paste.
Shape and coat
Shape the mixture into balls or cakes.
Dip in beaten egg and coat with bread crumbs, or dip in milk and then in flour.
Fry and serve
Fry in hot oil or butter until golden brown.
Serve hot with sauce or brown gravy.
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.
-
Bread + buttertop 7% of all pairsSmell alikemoderateCooked together27,232 recipes
Shared aroma: delta-decalactone (sweet, creamy).
-
Beans + oniontop 7% of all pairsSmell alikestrongCooked together5,242 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Beans + peppertop 11% of all pairsSmell alikemoderateCooked together4,733 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Onion + peppertop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Bread + eggtop 13% of all pairsSmell alikemoderateCooked together22,662 recipes
Shared aroma: (e)-2-octenal (fatty, green).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Boiled beans
- Form the main body of the croquettes and provide most of the texture.
- Bread crumbs
- Absorb moisture so the mixture holds together as a stiff paste.
- Egg
- Binds the mixture and forms a coating that browns when fried.
- Onion
- Adds aroma and savoury flavour to the bean mixture.
The step that matters
Forming a stiff paste. If the mixture is too wet, the croquettes will fall apart in the hot oil. Adding bread crumbs gradually until the paste holds its shape helps the shapes stay intact while frying.
Swap the beans
How well each one fits the dish's main ingredients (bread, onion, egg, butter, pepper):
- Peasfits about as well
- Beansthe original
- Lima beansfits about as well
- Sesamefits about as well
Fit is the average pairing score against bread, onion, egg, butter, pepper. 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.

Brown Bread461 recipes
White Bread80 recipes
Bread Omelette60 recipes
Oatmeal Bread51 recipes