Why it works: Cream and ketchup work together. They rank in the top 12% of all ingredient pairs, and cooks put them together in 279 recipes. Both carry ethanol, which smells alcoholic, ethereal. The science ↓
Ox Tail Soup
Ingredients
Directions
Prepare the broth
Clean and cut the ox tails into pieces.
Boil the pieces quietly in water for several hours.
Add the crust of bread and salt.
Finish and serve
Once tender, strain the liquid and remove the fat.
Thicken the soup with cream and stir in the ketchup.
Serve with the tails cut into pieces.
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.
-
Cream + ketchuptop 12% of all pairsSmell alikemoderateCooked together279 recipes
Shared aroma: ethanol (alcoholic, ethereal).
-
Bread + ketchuptop 22% of all pairsSmell alikelowCooked together813 recipes
Shared aroma: ethanol (alcoholic, ethereal).
-
Bread + creamtop 24% of all pairsSmell alikelowCooked together5,789 recipes
Shared aroma: delta-decalactone (sweet, creamy).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Ox tails
- Their collagen breaks down during long simmering, giving the broth body and a rich meaty flavor.
- Cream
- Adds richness and a smoother, slightly thicker texture to the finished soup.
- Ketchup
- Adds sweetness and acidity that round out the savory broth.
The step that matters
Keep the simmer gentle. Simmering quietly for several hours lets the tails become tender without toughening the meat. A hard, rolling boil breaks up the pieces and makes the broth cloudy and greasy, which is harder to skim and strain.
“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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