Name: Potato Salad
Ingredients: cold or freshly boiled potatoes; seasonings; hot cooked dressing; lettuce; chopped parsley; hard-cooked eggs or radish roses

Why it works: Lettuce and parsley match in chemistry and in kitchens. They rank in the top 5% of all ingredient pairs, and cooks put them together in 1,483 recipes. Both carry trans-2-hexenal, which smells green, leafy. The science ↓

Potato Salad

Ingredients

Directions

Cut the potatoes into ½ inch dice.
Mix the potatoes with seasonings.
Pour the hot cooked dressing over the potatoes and mix lightly with a fork.
Chill the mixture and arrange it in a mound on a bed of lettuce.
Garnish with chopped parsley and hard-cooked eggs or radish roses.

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.

Lettuce + parsleytop 5% of all pairs

Smell alikestrong

Cooked together1,483 recipes

Shared aroma: trans-2-hexenal (green, leafy).
Potato + parsleytop 5% of all pairs

Smell alikemoderate

Cooked together2,855 recipes

Shared aroma: 4'-methylacetophenone (bitter almond).
Potato + lettucetop 7% of all pairs

Smell alikestrong

Cooked together322 recipes

Shared aroma: 2-isobutyl-3-methoxypyrazine (green bell pepper, earthy).
Parsley + eggtop 21% of all pairs

Smell alikemoderate

Cooked together18,765 recipes

Shared aroma: 2,4-decadienal (seaweed).
Potato + eggtop 29% of all pairs

Smell alikemoderate

Cooked together4,978 recipes

Shared aroma: (e)-2-octenal (fatty, green).