Why it works: Beans and onion match in chemistry and in kitchens. They rank in the top 7% of all ingredient pairs, and cooks put them together in 5,242 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Bean Croquettes
Ingredients
Directions
Prepare the mixture
Mash the cold, boiled beans.
Add enough bread crumbs to make a stiff mixture.
Mix in a little chopped onion, pepper, and salt.
Shape and fry
Form the mixture into croquettes.
Dip each croquette into milk and then into flour.
Fry in hot oil or Crisco until golden brown.
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.
-
Beans + oniontop 7% of all pairsSmell alikestrongCooked together5,242 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Bread + milktop 11% of all pairsSmell alikemoderateCooked together11,466 recipes
Shared aroma: 2-undecenal (sweet).
-
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).
-
Beans + flourtop 11% of all pairsSmell alikemoderateCooked together2,080 recipes
Shared aroma: isobutyraldehyde (malty, green).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Beans
- Form the main body of the croquettes, providing bulk and a soft, starchy interior.
- Bread crumbs
- Absorb moisture from the mashed beans so the mixture holds its shape when formed.
- Milk
- Helps the flour coating adhere to each croquette before frying.
- Flour
- Forms a thin coating that helps the outside brown and crisp in the hot fat.
The step that matters
Frying in hot oil until golden brown. If the fat is not hot enough, croquettes absorb oil and turn greasy and may fall apart, while very high heat can brown the outside before the inside heats through.
Swap the onion
How well each one fits the dish's main ingredients (beans, bread, pepper, milk, flour):
- Capsicumfits better
- Sweet potatofits better
- Asparagusfits better
- Onionthe original
Fit is the average pairing score against beans, bread, pepper, milk, flour. 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