Name: Sardine Sandwiches
Ingredients: slices of bread; sardines; lemon juice

Why it works: Bread and lemon are a kitchen classic. They rank in the top 20% of all ingredient pairs, and cooks put them together in 8,445 recipes. Both carry 2-nonenal, which smells fatty, green. The science ↓

Sardine Sandwiches

Ingredients

slices of bread
sardines
lemon juice

Directions

Prepare

Cut thin slices of bread.
Remove the sardines from the box, split them open, and take out the bones. Cut off the heads and tails.

Assemble

Place halves of the sardines over half of the slices of bread.
Squeeze lemon juice over the sardines and press the slices together.
Cut the sandwiches into long, narrow pieces.

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.

Bread + lemontop 20% of all pairs

Smell alikemoderate

Cooked together8,445 recipes

Shared aroma: 2-nonenal (fatty, green).

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

What each ingredient does

Bread: Provides the structure that holds the sardines and lemon juice together.
Sardines: Supply the main filling, with rich, oily flavor and a savory character.
Lemon juice: Adds acidity that brightens the flavor of the fish and cuts its richness.

“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.