Name: Apple and Onion Salad
Ingredients: 3 mildly acid apples; 1 onion; Lettuce; French dressing

Why it works: Onion and lettuce match in chemistry and in kitchens. They rank in the top 8% of all ingredient pairs, and cooks put them together in 3,562 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓

Apple and Onion Salad

Ingredients

3 mildly acid apples
1 onion
Lettuce
French dressing

Directions

Slice the onion and apples.
Arrange the slices in lettuce leaves.
Season with French dressing.

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.

Onion + lettucetop 8% of all pairs

Smell alikestrong

Cooked together3,562 recipes

Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Apple + lettucetop 14% of all pairs

Smell alikemoderate

Cooked together515 recipes

Shared aroma: 2-isobutyl-3-methoxypyrazine (green bell pepper, earthy).
Apple + oniontop 19% of all pairs

Smell alikemoderate

Cooked together3,206 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

Apples: Provide crisp, slightly tart flesh that balances the sweetness of the dressing.
Onion: Adds sharp, pungent flavour that contrasts with the mild apple.
French dressing: Adds moisture and sweet-acid seasoning that flavours the slices.