Name: Hot Potato Salad
Ingredients: potatoes; 1 large onion; coarse sea salt; pepper; vinegar; hard boiled eggs; celery (optional)

Why it works: Potato and onion are a kitchen classic. They rank in the top 3% of all ingredient pairs, and cooks put them together in 9,023 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓

Hot Potato Salad

Ingredients

Directions

Peel and slice the potatoes.
Place the potatoes and sliced onion in a pot and cover with water.
Cook until the potatoes are tender.
Season with coarse sea salt and pepper.
Add vinegar to taste.
Garnish with slices of hard boiled eggs.
If desired, cook a little celery with the potatoes.

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.

Potato + oniontop 3% of all pairs

Smell alikemoderate

Cooked together9,023 recipes

Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Pepper + celerytop 5% of all pairs

Smell alikestrong

Cooked together16,012 recipes

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

Smell alikemoderate

Cooked together2,047 recipes

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

Smell alikemoderate

Cooked together18,518 recipes

Shared aroma: guaiacol (smoky, sweet).
Potato + peppertop 9% of all pairs

Smell alikemoderate

Cooked together8,305 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

Swap the celery

The recipe marks celery as optional. How well each one fits the dish's main ingredients (potato, onion, pepper, vinegar, egg):

Garlicfits better
Dillfits better
Parsleyfits better
Celerythe original

Fit is the average pairing score against potato, onion, pepper, vinegar, egg. Candidates are from the same food group and used in at least 100 recipes.