Name: Pepper and Grapefruit Salad
Ingredients: 3 green peppers; 3 red peppers; 1 grapefruit, finely cut; 2 cups chopped celery hearts; 6 English walnut meats, broken; Lettuce leaves; Mayonnaise

Why it works: Grapefruit and lettuce match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 118 recipes. Both carry trans-2-hexenal, which smells green, leafy. The science ↓

Pepper and Grapefruit Salad

Ingredients

Directions

Prepare the peppers

Cut slices from the stem ends of the peppers and remove the seeds.

Fill and serve

Refill the pepper shells with twice as much grapefruit pulp as chopped celery.
Add 2 walnut meats to each pepper.
Arrange the filled peppers on lettuce leaves and top with mayonnaise.

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.

Grapefruit + lettucetop 1% of all pairs

Smell alikestrong

Cooked together118 recipes

Shared aroma: trans-2-hexenal (green, leafy).
Walnut + lettucetop 1% of all pairs

Smell alikestrong

Cooked together491 recipes

Shared aroma: trans-2-hexenal (green, leafy).
Celery + lettucetop 4% of all pairs

Smell alikestrong

Cooked together2,033 recipes

Shared aroma: nonanal (fat, citrus).
Pepper + celerytop 5% of all pairs

Smell alikestrong

Cooked together16,012 recipes

Shared aroma: 4'-methylacetophenone (bitter almond).
Celery + walnuttop 6% of all pairs

Smell alikestrong

Cooked together852 recipes

Shared aroma: alpha-pinene (pine, turpentine).

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

What each ingredient does

Grapefruit: Adds juicy, tart acidity that brightens the rich mayonnaise and filling.
Celery hearts: Provide crisp texture that contrasts with the soft filling.
English walnut meats: Add crunch and a nutty, slightly bitter flavor to the filling.
Mayonnaise: Adds fat and creaminess that moistens the filling and balances the acidity.

Swap the grapefruit

How well each one fits the dish's main ingredients (pepper, celery, walnut, meat, lettuce):

Avocadofits better
Limefits better
Lemonfits about as well
Grapefruitthe original

Fit is the average pairing score against pepper, celery, walnut, meat, lettuce. Candidates are from the same food group and used in at least 100 recipes.

“What each ingredient does” and “The step that matters” were written by Claude from this recipe’s own method and reviewed in samples by CompKitchen.