Why it works: Allspice and ginger match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 2,620 recipes. Both carry estragole, which smells anise, licorice. The science ↓
Mushroom Catchup
Ingredients
Directions
The book says “a cool oven”. The 300°F in the steps is the modern equivalent, not the book's own figure.
Draw out the liquid
Break the mushrooms into a large basin.
Strew the coarse sea salt over the mushrooms.
Place in a cool oven (300°F / 150°C) overnight.
Boil and bottle
Strain off the liquid, measure it, and let it boil for 15 minutes.
Add black pepper to the liquid and let it boil for another hour.
Add allspice, ginger, and mace.
When cold, bottle and cork.
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 + gingertop 1% of all pairsSmell alikestrongCooked together2,620 recipes
Shared aroma: estragole (anise, licorice).
-
Pepper + allspicetop 5% of all pairsSmell alikestrongCooked together6,395 recipes
Shared aroma: estragole (anise, licorice).
-
Allspice + macetop 7% of all pairsSmell alikemoderateCooked together3,189 recipes
Shared aroma: methyleugenol (clove, spice).
-
Pepper + gingertop 9% of all pairsSmell alikestrongCooked together6,800 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Mushroom + peppertop 11% of all pairsSmell alikemoderateCooked together13,580 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
- Mushrooms
- Supply the bulk and the liquid that becomes the ketchup base.
- Coarse sea salt
- Draws water out of the mushrooms and helps preserve the liquid.
- Black pepper
- Adds sharp, pungent heat that rounds out the savoury flavour.
- Allspice
- Adds warm, aromatic spice notes to the liquid.
- Ginger
- Adds a bright, aromatic warmth to the liquid.
- Mace
- Adds a delicate, nutmeg-like aroma to the liquid.
The step that matters
Strew the coarse sea salt over the mushrooms. Salt draws water out of the mushrooms by osmosis, creating the liquid that becomes the ketchup. Too little salt lets the mushrooms spoil before enough liquid forms.
Swap the mace
How well each one fits the dish's main ingredients (mushroom, pepper, allspice, ginger):
- Clovefits better
- Thymefits better
- Turmericfits better
- Macethe original
Fit is the average pairing score against mushroom, pepper, allspice, ginger. 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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