Name: Chicken Sandwiches
Ingredients: 1 cup cooked chicken, pounded to a paste; ½ cup mayonnaise; 6 pickling onions, minced; ½ teaspoon celery salt; a tiny bit of cayenne pepper; a few drops of lemon juice; lettuce leaves or watercress; thin slices of bread

Why it works: Pepper and lemon match in chemistry and in kitchens. They rank in the top 3% of all ingredient pairs, and cooks put them together in 27,047 recipes. Both carry trans-2-nonenal, which smells cardboard, fatty. The science ↓

Chicken Sandwiches

Ingredients

Directions

Prepare the filling

In a bowl, combine the chicken paste, mayonnaise, minced pickling onions, celery salt, cayenne pepper, and lemon juice. Mix until well combined.

Assemble

Spread the mixture between lettuce leaves or watercress.
Place the filled leaves between two slices of bread.

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.

Pepper + lemontop 3% of all pairs

Smell alikestrong

Cooked together27,047 recipes

Shared aroma: trans-2-nonenal (cardboard, fatty).
Celery + lemontop 3% of all pairs

Smell alikestrong

Cooked together3,467 recipes

Shared aroma: beta-phellandrene (minty, terpene).
Celery + lettucetop 4% of all pairs

Smell alikestrong

Cooked together2,033 recipes

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

Smell alikestrong

Cooked together16,012 recipes

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

Smell alikemoderate

Cooked together18,518 recipes

Shared aroma: guaiacol (smoky, sweet).

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

What each ingredient does

Cooked chicken: Forms the bulk of the filling, giving it substance and a meaty texture.
Mayonnaise: Adds fat and moisture, binding the chicken into a spreadable mixture.
Pickling onions: Contribute sharp, savory flavor and a little crunch to the filling.

Swap the onion

How well each one fits the dish's main ingredients (chicken, celery, pepper, lemon, lettuce, bread):

Spinachfits better
Mustardfits better
Capsicumfits better
Onionthe original

Fit is the average pairing score against chicken, celery, pepper, lemon, lettuce, bread. 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.