Why it works: Onion and pepper are a kitchen classic. They rank in the top 11% of all ingredient pairs, and cooks put them together in 68,474 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Oxtail Stew
Ingredients
Directions
The book gives no oven temperature. The 300°F (150°C) in the steps was added when the recipe was transcribed, as a starting point.
Prepare
Fry the pieces of ox tail and sliced onion until browned.
Add salt and pepper to taste.
Stew
Place the fried tail and onion in a Nottingham jar and cover with water.
Stew in a 300°F (150°C) oven for three hours.
Thicken and serve
Before serving, thicken the gravy with flour mixed with cold water and add a dash of ketchup.
Serve the stew on a hot dish, garnished with snippets of toast.
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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Onion + peppertop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Flour + ketchuptop 13% of all pairsSmell alikemoderateCooked together2,435 recipes
Shared aroma: ethanol (alcoholic, ethereal).
-
Onion + flourtop 17% of all pairsSmell alikemoderateCooked together32,460 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Pepper + flourtop 19% of all pairsSmell alikemoderateCooked together50,459 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Onion + ketchuptop 19% of all pairsSmell alikelowCooked together1,997 recipes
Shared aroma: ethanol (alcoholic, ethereal).
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, as it stews, rich gelatin that gives the gravy body.
- Onion
- Adds sweetness and savoury depth to the gravy as it browns and softens.
- Flour
- Thickens the gravy so it coats the meat rather than running thin.
The step that matters
Browning the ox tail and onion. Frying until browned triggers the Maillard reaction, which builds the deep, roasted flavour the gravy depends on. Pale frying leaves the stew tasting flat.
Swap the onion
How well each one fits the dish's main ingredients (pepper, flour, ketchup):
- Capsicumfits better
- Horseradishfits better
- Turnipfits better
- Onionthe original
Fit is the average pairing score against pepper, flour, 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.
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