Name: Oysters on Half Shell
Ingredients: 5-6 oysters per person; cracked or shaved ice; 1/4 lemon per plate; 1 teaspoon freshly grated horseradish per small shell

Why it works: Lemon and horseradish match in chemistry and in kitchens. They rank in the top 9% of all ingredient pairs, and cooks put them together in 1,155 recipes. Both carry coumarin, which smells sweet, hay. The science ↓

Oysters on Half Shell

Ingredients

5-6 oysters per person
cracked or shaved ice
1/4 lemon per plate
1 teaspoon freshly grated horseradish per small shell

Directions

Place the oyster shells on a plate of cracked or shaved ice.
For each person, use 5-6 oysters and place them in the center of the plate.
Add a quarter of a lemon to the center of each plate.
If using very small shells, place 1 teaspoon of freshly grated horseradish on each small shell and arrange them between the oysters.

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.

Lemon + horseradishtop 9% of all pairs

Smell alikestrong

Cooked together1,155 recipes

Shared aroma: coumarin (sweet, hay).
Oyster + horseradishtop 13% of all pairs

Smell alikemoderate

Cooked together282 recipes

Shared aroma: 2-methylbutyraldehyde (malty, chocolate).
Oyster + lemontop 26% of all pairs

Smell alikemoderate

Cooked together2,942 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

Oysters: Provide the main briny, sea-fresh flavour and are the centre of the dish.
Lemon: Adds acidity that brightens the briny flavour of the oysters.
Horseradish: Adds sharp, pungent heat that contrasts with the briny oyster flavour.