Name: Curried Calf's Brain
Ingredients: 1 onion; ½ teaspoon baking soda; water; a few slices of a tart apple; 1 tablespoon flour; 1 teaspoon curry powder; salt to taste; pepper to taste

Why it works: Onion and pepper are a kitchen classic. They rank in the top 11% of all ingredient pairs, and cooks put them together in 68,474 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓

Curried Calf's Brain

Ingredients

Directions

Skin the onion and place it in a pan with boiling water and baking soda. Boil briefly and drain.
Return the onion to the pan, cover with water, and add the apple slices. Cook for 20 minutes.
In a bowl, mix the flour, curry powder, salt, and pepper. Moisten with water to form a paste.
Add the paste to the onion mixture and allow to boil.

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.

Onion + peppertop 11% of all pairs

Smell alikemoderate

Cooked together68,474 recipes

Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Onion + flourtop 17% of all pairs

Smell alikemoderate

Cooked together32,460 recipes

Shared aroma: isobutyraldehyde (malty, green).
Apple + peppertop 18% of all pairs

Smell alikemoderate

Cooked together3,026 recipes

Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Onion + appletop 19% of all pairs

Smell alikemoderate

Cooked together3,206 recipes

Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Flour + peppertop 19% of all pairs

Smell alikemoderate

Cooked together50,459 recipes

Shared aroma: isobutyraldehyde (malty, green).