Name: To Pickle Shad
Ingredients: nice large shad; coarse sea salt; cold water; boiling hot vinegar; allspice; cloves; black pepper

Why it works: Allspice and clove match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 7,874 recipes. Both carry estragole, which smells anise, licorice. The science ↓

To Pickle Shad

Ingredients

Directions

Clean and cut open the shad, then salt them and let them stand for 3 to 4 days.
Cut the shad into 4-inch pieces.
Place the pieces in a pot with cold water and boil until cooked through but not falling off the bone.
Allow the fish to cool, then place them in a jar.
Pour boiling hot vinegar over the fish, adding allspice, cloves, and black pepper boiled in it, enough to cover the fish.

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.

Allspice + clovetop 1% of all pairs

Smell alikestrong

Cooked together7,874 recipes

Shared aroma: estragole (anise, licorice).
Clove + peppertop 5% of all pairs

Smell alikestrong

Cooked together17,451 recipes

Shared aroma: ethyl octanoate (fruity, wine).
Allspice + peppertop 5% of all pairs

Smell alikestrong

Cooked together6,395 recipes

Shared aroma: estragole (anise, licorice).
Vinegar + allspicetop 13% of all pairs

Smell alikemoderate

Cooked together4,548 recipes

Shared aroma: 2-methylbutyl acetate (fruit).
Vinegar + peppertop 14% of all pairs

Smell alikemoderate

Cooked together27,814 recipes

Shared aroma: 4'-methylacetophenone (bitter almond).