Why it works: Pepper and tomato are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 17,923 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Ox-Tail
Ingredients
Directions
Prepare
In a pot, melt the butter over medium heat.
Add the chopped ox-tail and stir until browned.
Remove excess fat, then add broth and bring to a boil.
Simmer and serve
Reduce heat and simmer until the ox-tail is tender.
Season with salt and pepper, and add tomatoes if using.
Simmer gently for an additional 15 minutes if tomatoes are added.
Serve the soup with the meat included.
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.
-
Pepper + tomatotop 7% of all pairsSmell alikemoderateCooked together17,923 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Butter + peppertop 21% of all pairsSmell alikemoderateCooked together85,593 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
-
Butter + tomatotop 22% of all pairsSmell alikemoderateCooked together6,918 recipes
Shared aroma: 3-hexenal (apple, fruity).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Ox-tail
- Provides the meat and collagen that become tender and enrich the broth during long simmering.
- Butter
- Adds fat for browning the ox-tail and carries flavour into the soup.
- Broth
- Forms the liquid base of the soup and carries its savoury flavour.
- Tomatoes
- Add acidity and a fresh, tangy flavour to the broth.
The step that matters
Remove excess fat, then add broth and bring to a boil. Excess fat left in the pot will float into the broth and make the soup greasy. Skimming it before the liquid boils keeps the broth clean and the flavour balanced.
Swap the tomato
The recipe marks tomato as optional. How well each one fits the dish's main ingredients (butter, pepper):
- Capsicumfits better
- Potatofits better
- Carrotfits about as well
- Tomatothe original
Fit is the average pairing score against butter, pepper. 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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