Why it works: Shallot and garlic match in chemistry and in kitchens. They rank in the top 4% of all ingredient pairs, and cooks put them together in 2,000 recipes. Both carry coumarin, which smells sweet, hay. The science ↓
Walnxtt Ketchup
Ingredients
Directions
Make the ketchup
Boil the walnut juice gently and skim it well.
Add anchovies, clove, shallots, mace, pepper, and garlic.
Boil until the shallots sink.
Cool the mixture in a pan.
Bottle and age
Bottle it, dividing the spices equally among the bottles.
Cork the bottles tightly and cover the corks with bladder.
Let it sit for at least one year before using.
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.
-
Shallot + garlictop 4% of all pairsSmell alikestrongCooked together2,000 recipes
Shared aroma: coumarin (sweet, hay).
-
Clove + peppertop 5% of all pairsSmell alikestrongCooked together17,451 recipes
Shared aroma: ethyl octanoate (fruity, wine).
-
Clove + shallottop 5% of all pairsSmell alikestrongCooked together1,677 recipes
Shared aroma: eucalyptol (eucalyptus, herbal).
-
Walnut + shallottop 6% of all pairsSmell alikestrongCooked together440 recipes
Shared aroma: 2,4-decadienal (seaweed).
-
Clove + macetop 6% of all pairsSmell alikelowCooked together8,400 recipes
Shared aroma: methyleugenol (clove, spice).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Expressed walnut juice
- Forms the liquid base that the other ingredients are simmered and aged in.
- Anchovies
- Adds savoury depth as they break down during the long boil and aging.
- Shallots
- Contribute aromatic sweetness and body to the simmered liquid.
- Garlic
- Adds pungent aroma that mellows during the long aging period.
- Clove
- Adds warm aromatic spice that preserves its character through long storage.
The step that matters
Cork the bottles tightly. A tight seal limits contact with air during the long year of aging, which helps keep the ketchup from spoiling and preserves its flavour.
Swap the mace
How well each one fits the dish's main ingredients (walnut, clove, shallot, pepper, garlic):
- Thymefits better
- Parsleyfits better
- Tarragonfits better
- Macethe original
Fit is the average pairing score against walnut, clove, shallot, pepper, garlic. 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.
You might also like
The free Flavor Lab newsletter: one surprising pairing a week and the molecular reason it works, in 60 seconds. No spam, unsubscribe anytime.
Prefer an account? Create a free account to save pairings and unlock the full chemistry.
Tomato Soup526 recipes
Brown Bread461 recipes
Mutton Broth292 recipes
Yorkshire Pudding264 recipes