Name: Kidney Stew
Ingredients: 2 beef kidneys; 2 bay leaves; 1 cup stewed tomatoes; 1 large onion; salt and pepper to taste; flour for thickening

Why it works: Beef and onion are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 17,092 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓

Kidney Stew

Ingredients

Directions

Prepare and cook

Clean and slice the kidneys.
Boil the kidneys with the bay leaves for about 45 minutes.
Add the stewed tomatoes and sliced onion, and cook for an additional 15 minutes.

Finish the gravy

Thicken the gravy with flour and season with salt and pepper to taste.

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.

Beef + oniontop 7% of all pairs

Smell alikemoderate

Cooked together17,092 recipes

Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Tomato + peppertop 7% of all pairs

Smell alikemoderate

Cooked together17,923 recipes

Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Beef + tomatotop 8% of all pairs

Smell alikemoderate

Cooked together5,448 recipes

Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Tomato + oniontop 8% of all pairs

Smell alikemoderate

Cooked together20,633 recipes

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

Smell alikemoderate

Cooked together18,971 recipes

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

Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs

What each ingredient does

Beef kidneys: Form the main body of the stew, becoming tender with long simmering.
Stewed tomatoes: Add acidity and liquid that builds the savoury base of the gravy.
Onion: Adds sweetness and aroma as it softens in the cooking liquid.
Flour: Thickens the gravy so it clings to the kidneys and vegetables.