Name: Tripe with Onion Sauce
Ingredients: 2 pounds boiled tripe; ½ cup milk; ½ teaspoon white pepper; 1 Spanish onion

Why it works: Milk and onion are a kitchen classic. They rank in the top 20% of all ingredient pairs, and cooks put them together in 13,418 recipes. Both carry hexanal, which smells green, grassy. The science ↓

Tripe with Onion Sauce

Ingredients

2 pounds boiled tripe
½ cup milk
½ teaspoon white pepper
1 Spanish onion

Directions

Prepare

Cut the boiled tripe into small irregular pieces.
Boil the onion in water for 30 minutes, then drain and chop finely.

Make the sauce

In a saucepan, cover the tripe with milk and stew over low heat for 30 minutes.
Stir the chopped onion into the tripe and milk mixture.
Season with white pepper and serve immediately.

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.

Milk + oniontop 20% of all pairs

Smell alikemoderate

Cooked together13,418 recipes

Shared aroma: hexanal (green, grassy).
White pepper + oniontop 28% of all pairs

Smell alikelow

Cooked together2,395 recipes

Shared aroma: 2-methylbutyraldehyde (malty, chocolate).
Milk + white peppertop 31% of all pairs

Smell alikelow

Cooked together1,304 recipes

Shared aroma: eucalyptol (eucalyptus, herbal).

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

What each ingredient does

Boiled tripe: Forms the main body of the dish and becomes tender during slow stewing.
Milk: Stews with the tripe to add moisture and a mild, creamy richness to the sauce.
Spanish onion: Adds mild sweetness and aroma, softened by boiling before it is chopped in.