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To Pickle Walnuts

A method for pickling walnuts in a brine and vinegar mixture.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 11 ingredients
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Why it works: Ginger and clove match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 6,038 recipes. Both carry estragole, which smells anise, licorice. The science ↓

To Pickle Walnuts

Ingredients

Directions

Brine the walnuts

  1. Gather walnuts while they are still soft enough to be pierced with a pin.

  2. Make brine with 6 ounces of salt dissolved in 2 quarts of water.

  3. Remove any scum from the surface of the brine.

  4. Add walnuts to the brine and stir them twice daily.

  5. Change the brine every three days.

  6. For immediate eating, leave walnuts in brine for 12 days; otherwise, drain after 9 days.

Dry the walnuts

  1. Spread drained walnuts on dishes and expose to air until they turn black, about 12 hours.

Pickle and store

  1. In a pot, combine vinegar, 1 teaspoon salt, black pepper, ginger, mace, cloves, and mustard seed.

  2. Boil the mixture for 5 minutes.

  3. Place walnuts in a stone jar and pour the hot pickle over them.

  4. Once the pickle is cold, cover the jar securely and store in a dry place.

  5. Ensure walnuts are always covered with vinegar and boil any added vinegar.

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.

  1. Ginger + clovetop 1% of all pairs
    Smell alikestrong
    Cooked together6,038 recipes

    Shared aroma: estragole (anise, licorice).

  2. Pepper + clovetop 5% of all pairs
    Smell alikestrong
    Cooked together17,451 recipes

    Shared aroma: ethyl octanoate (fruity, wine).

  3. Onion + mustardtop 6% of all pairs
    Smell alikestrong
    Cooked together9,259 recipes

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

  4. Mace + clovetop 6% of all pairs
    Smell alikelow
    Cooked together8,400 recipes

    Shared aroma: methyleugenol (clove, spice).

  5. Vinegar + mustardtop 7% of all pairs
    Smell alikemoderate
    Cooked together14,067 recipes

    Shared aroma: isobutyraldehyde (malty, green).

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

What each ingredient does

Walnuts
Young green walnuts are the main ingredient; brining softens and blackens them while they take on the pickle flavour.
Salt
Draws water out of the walnuts and preserves them during the brining stage.
Vinegar
Acidic base of the pickle that preserves the walnuts and gives them their sharp flavour.
Black pepper
Adds pungent heat and aroma to the pickling liquid.
Mustard seed
Adds sharp, pungent flavour to the pickle.

The step that matters

Drying the brined walnuts until they turn black. Exposing the walnuts to air lets them oxidise and darken, which is what gives pickled walnuts their colour. Leaving them too short a time, or drying them in an uncovered pot, can leave them pale or wet, and wet walnuts spoil more easily in vinegar.

Swap the mace

How well each one fits the dish's main ingredients (walnut, vinegar, pepper, ginger, clove, onion, mustard):

  1. Allspicefits better
  2. Turmericfits better
  3. Cinnamonfits better
  4. Macethe original

Fit is the average pairing score against walnut, vinegar, pepper, ginger, clove, onion, mustard. 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.

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