Name: To Pickle Onions
Ingredients: small onions; brine; white wine vinegar; mace; cloves; whole pepper

Why it works: Clove and pepper match in chemistry and in kitchens. They rank in the top 5% of all ingredient pairs, and cooks put them together in 17,451 recipes. Both carry ethyl octanoate, which smells fruity, wine. The science ↓

To Pickle Onions

Ingredients

Directions

Clear the small onions from their skins.
Soak the onions in brine for one day, changing the brine once.
Dry the onions well with a clean cloth.
Boil white wine vinegar with mace, cloves, and whole pepper.
Pour the hot vinegar mixture over the onions and cover them tightly when cooled.

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.

Clove + peppertop 5% of all pairs

Smell alikestrong

Cooked together17,451 recipes

Shared aroma: ethyl octanoate (fruity, wine).
Mace + clovetop 6% of all pairs

Smell alikelow

Cooked together8,400 recipes

Shared aroma: methyleugenol (clove, spice).
Onion + peppertop 11% of all pairs

Smell alikemoderate

Cooked together68,474 recipes

Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
White wine + vinegartop 11% of all pairs

Smell alikemoderate

Cooked together1,776 recipes

Shared aroma: beta-damascenone (apple, rose).
Onion + white winetop 12% of all pairs

Smell alikemoderate

Cooked together4,535 recipes

Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).

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

Swap the mace

How well each one fits the dish's main ingredients (onion, white wine, vinegar, clove, pepper):

Thymefits better
Garlicfits better
Allspicefits better
Macethe original

Fit is the average pairing score against onion, white wine, vinegar, clove, pepper. Candidates are from the same food group and used in at least 100 recipes.