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Mushkoom Catsup

A fermented mushroom-based ketchup made with salt, cloves, cinnamon, pepper, and ginger.

From an old cookbook · modernised transcription
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Why it works: Clove and cinnamon match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 14,189 recipes. Both carry ethyl cinnamate, which smells sweet, balsamic. The science ↓

Mushkoom Catsup

Oven, in the book's wordsA hot oven

Ingredients

Directions

The book says “a hot oven”. The 400°F (200°C) in the steps is the modern equivalent, not the book's own figure.

Prepare the mushrooms

  1. Wash the mushroom tops clean and mash them.

  2. Sprinkle coarse sea salt over the mashed mushrooms and let them sit overnight.

Cook and strain

  1. Place the mixture in a saucepan and cook in a hot oven at 400°F (200°C) for 10 to 12 hours.

  2. Strain the mixture through a sieve to extract all the juice.

Season and reduce

  1. For every gallon of liquid, add ½ pound of salt, 1 ounce of cloves, 1 ounce of cinnamon, 1 ounce of black pepper, and 1 ounce of ginger.

  2. Heat the mixture over the fire until it reduces by half.

Cool and bottle

  1. Transfer to an earthen dish to cool, then bottle for use.

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. Clove + cinnamontop 1% of all pairs
    Smell alikestrong
    Cooked together14,189 recipes

    Shared aroma: ethyl cinnamate (sweet, balsamic).

  2. Cinnamon + gingertop 1% of all pairs
    Smell alikestrong
    Cooked together6,380 recipes

    Shared aroma: estragole (anise, licorice).

  3. Clove + gingertop 1% of all pairs
    Smell alikestrong
    Cooked together6,038 recipes

    Shared aroma: estragole (anise, licorice).

  4. Clove + peppertop 5% of all pairs
    Smell alikestrong
    Cooked together17,451 recipes

    Shared aroma: ethyl octanoate (fruity, wine).

  5. Pepper + gingertop 9% of all pairs
    Smell alikestrong
    Cooked together6,800 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

What each ingredient does

Full-grown mushroom tops
Provide the main body, savoury flavour and liquid that becomes the ketchup.
Coarse sea salt
Draws juice out of the mushrooms and helps preserve the mixture.
Cloves
Add a warm, aromatic spice flavour.
Cinnamon
Adds a sweet, woody aroma and warmth.
Black pepper
Adds sharp, pungent heat that balances the savoury base.
Ginger
Adds a zesty, aromatic bite.

The step that matters

Reducing the strained liquid by half. Heating concentrates the liquid by evaporating water, which intensifies the flavour and helps the ketchup keep. Stopping too early leaves it thin and watery, while overheating can scorch the spices and darken the sauce.

Swap the ginger

How well each one fits the dish's main ingredients (mushroom, clove, cinnamon, pepper):

  1. Allspicefits better
  2. Nutmegfits better
  3. Cardamomfits about as well
  4. Gingerthe original

Fit is the average pairing score against mushroom, clove, cinnamon, pepper. 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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