Why it works: Clove and nutmeg match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 8,686 recipes. Both carry estragole, which smells anise, licorice. The science ↓
Walnut Catsup
Ingredients
Directions
Prepare the walnuts
Prick the walnuts with a pin and layer them in an unglazed jar with a light sprinkling of salt.
Pound the walnuts lightly with a piece of wood to bruise them.
Let the mixture stand for ten days, stirring daily.
Make the ketchup
Strain the juice into a saucepan.
Cover the walnut shells with boiling vinegar, crush to a pulp, and strain through a colander into the saucepan.
Add spices: 1 ounce each of black pepper and ginger, ½ ounce each of cloves and nutmeg, a pinch of cayenne, a bag of celery seed, and 1 minced onion for every 2 quarts.
Boil the mixture for one hour for each gallon.
Bottle and seal
Bottle the catsup when cold, dividing the spices equally among the bottles.
Cork and seal the bottles.
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.
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Clove + nutmegtop 1% of all pairsSmell alikestrongCooked together8,686 recipes
Shared aroma: estragole (anise, licorice).
-
Ginger + clovetop 1% of all pairsSmell alikestrongCooked together6,038 recipes
Shared aroma: estragole (anise, licorice).
-
Walnut + nutmegtop 5% of all pairsSmell alikestrongCooked together1,230 recipes
Shared aroma: eucalyptol (eucalyptus, herbal).
-
Pepper + clovetop 5% of all pairsSmell alikestrongCooked together17,451 recipes
Shared aroma: ethyl octanoate (fruity, wine).
-
Ginger + nutmegtop 5% of all pairsSmell alikestrongCooked together3,324 recipes
Shared aroma: estragole (anise, licorice).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Young tender walnuts
- Provide the main body and flavour of the ketchup as they break down over the long steeping.
- Boiling vinegar
- Extracts flavour from the walnut shells and adds sharp acidity that helps preserve the ketchup.
- Coarse sea salt
- Draws juice out of the walnuts and helps preserve the mixture during the ten-day standing.
The step that matters
Boil the mixture for one hour for each gallon. Boiling concentrates the flavour and helps reduce the risk of spoilage, so the time should match the batch size rather than be cut short.
Swap the onion
How well each one fits the dish's main ingredients (walnut, vinegar, pepper, ginger, clove, nutmeg, celery):
- Carrotfits better
- Capsicumfits better
- Mustardfits better
- Onionthe original
Fit is the average pairing score against walnut, vinegar, pepper, ginger, clove, nutmeg, celery. 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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