Name: Mexican Beans
Ingredients: dried beans; 1 whole onion; 1 slice of salt pork or bacon; 1 green or red pepper; coarse sea salt (to taste)

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 ↓

Mexican Beans

Ingredients

Directions

Wash the beans well.
Soak the beans overnight in plenty of cold water.
In the morning, drain the water and add fresh cold water.
Cook the beans on the stove for six to eight hours.
Add the whole onion, slice of salt pork or bacon, and green or red pepper during cooking.
Add coarse sea salt to taste before serving.

Recipe from a historical cookbook (Internet Archive).

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.

Beans + oniontop 7% of all pairs

Smell alikestrong

Cooked together5,242 recipes

Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Onion + porktop 10% of all pairs

Smell alikemoderate

Cooked together18,214 recipes

Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Beans + peppertop 11% of all pairs

Smell alikemoderate

Cooked together4,733 recipes

Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Onion + peppertop 11% of all pairs

Smell alikemoderate

Cooked together68,474 recipes

Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Beans + porktop 11% of all pairs

Smell alikemoderate

Cooked together2,000 recipes

Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).