Name: Ox-tail Soup
Ingredients: 1 large or 2 small ox tails; water; carrots; onions; pepper; coarse sea salt; flour; fried onion; good consomme

Why it works: Carrot and pepper match in chemistry and in kitchens. They rank in the top 6% of all ingredient pairs, and cooks put them together in 14,555 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓

Ox-tail Soup

Ingredients

Directions

Cut the ox tails into joints.
Stew the joints slowly in a pot with sufficient water, carrots, onions, pepper, and salt for 3 to 4 hours until the meat comes off the bones easily.
Remove the ox tail pieces and set them aside.
Thicken the stew with flour and fried onion, then dilute with good consomme.
Strain the soup, add the ox tail pieces, bring to a boil, and serve.

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.

Carrot + peppertop 6% of all pairs

Smell alikestrong

Cooked together14,555 recipes

Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Carrot + oniontop 6% of all pairs

Smell alikemoderate

Cooked together21,601 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).
Carrot + flourtop 13% of all pairs

Smell alikemoderate

Cooked together8,029 recipes

Shared aroma: isobutyraldehyde (malty, green).
Onion + flourtop 17% of all pairs

Smell alikemoderate

Cooked together32,460 recipes

Shared aroma: isobutyraldehyde (malty, green).