Why it works: Basil and pepper match in chemistry and in kitchens. They rank in the top 4% of all ingredient pairs, and cooks put them together in 5,294 recipes. Both carry methyl cinnamate, which smells strawberry. The science ↓
Ox-tail Soup
Ingredients
Directions
Prepare the oxtails
Cut the oxtails into joints, wash them in lukewarm water and dry with a cloth.
Dredge the oxtails with flour.
Fry the oxtails in sweet dripping in a frying pan until light brown.
Place the oxtails in a stewpan with warm water.
Make the soup
Slice the onions and dredge them with flour.
Fry the onions until brown.
Add hot water and mix well, then pour the onion mixture into the stewpan with the oxtails.
Add allspice, black peppercorns, basil, and sliced carrot tied in muslin.
Simmer on low heat for 3 hours until meat is tender.
Remove the oxtails and strain the soup over them.
Chill, season and serve
Let cool, preferably overnight, then remove the fat from the top.
Cut the meat into pieces.
Stir in salt, cayenne pepper, and ketchup.
Return the mixture to the stewpan and heat gently for about 30 minutes.
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.
-
Basil + peppertop 4% of all pairsSmell alikestrongCooked together5,294 recipes
Shared aroma: methyl cinnamate (strawberry).
-
Basil + carrottop 5% of all pairsSmell alikestrongCooked together1,113 recipes
Shared aroma: methyl cinnamate (strawberry).
-
Allspice + basiltop 5% of all pairsSmell alikestrongCooked together195 recipes
Shared aroma: estragole (anise, licorice).
-
Allspice + peppertop 5% of all pairsSmell alikestrongCooked together6,395 recipes
Shared aroma: estragole (anise, licorice).
-
Allspice + carrottop 5% of all pairsSmell alikestrongCooked together1,021 recipes
Shared aroma: beta-phellandrene (minty, terpene).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Oxtails
- Collagen-rich meat that breaks down during long simmering to give tender meat and body to the broth.
- Flour
- Dredging coats the meat and onions, helping them brown and thickening the soup slightly.
- Onions
- Browned onions add deep savory flavour and sweetness to the broth.
- Sweet dripping or oil
- Fat for frying that carries heat and promotes browning on the oxtails and onions.
- Carrot
- Adds subtle sweetness and aromatic depth to the broth while it simmers.
- Ketchup
- Adds acidity and sweet-tangy depth to the finished soup.
The step that matters
Simmer gently until the meat is tender. A low, steady simmer lets collagen in the oxtails slowly break down into gelatin, giving tender meat and a rich body. Boiling hard toughens the meat and clouds the broth.
Swap the onion
How well each one fits the dish's main ingredients (flour, allspice, basil, carrot, pepper, ketchup):
- Capsicumfits better
- Turnipfits better
- Parsnipfits better
- Onionthe original
Fit is the average pairing score against flour, allspice, basil, carrot, pepper, ketchup. 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.
More ox tail soup recipes
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.
Carrot Soup134 recipes
Tomato Soup526 recipes
Brown Bread461 recipes
Mutton Broth292 recipes