Why it works: Butter and milk are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 81,283 recipes. Both carry (z)-4-heptenal, which smells biscuit, cream. The science ↓
Stewed Tripe with Onions
Ingredients
Directions
Prepare the tripe
Blanch the tripe by placing it in a saucepan, covering it with cold water, and bringing it to a boil.
Strain away the water and cut the tripe into pieces about two inches square.
Simmer
Return the tripe to the saucepan with finely chopped onions, just cover with hot water, and simmer for about one hour or until tender.
Make the sauce and serve
Transfer the tripe and onions to a hot dish.
In a bowl, mix the butter and flour with a wooden spoon.
Gradually add the cooking water from the tripe, keeping it smooth.
Stir in the milk and heat until it boils.
Season to taste and pour over the tripe.
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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Butter + milktop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Pepper + oniontop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Flour + milktop 14% of all pairsSmell alikelowCooked together78,219 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Butter + oniontop 15% of all pairsSmell alikemoderateCooked together42,912 recipes
Shared aroma: decanal (soap, orange peel).
Butter and flour barely smell alike, yet cooks put them together in 124,287 recipes: they work on texture and structure more than aroma.
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Tripe
- Forms the main body of the stew and becomes tender through long, gentle simmering.
- Butter
- Enriches the sauce and carries flavour, adding richness to the finished dish.
- Flour
- Thickens the cooking liquid into a smooth sauce when mixed with butter.
- Milk
- Makes the sauce creamy and mild, softening the flavour of the stew.
- Onions
- Add sweetness and aroma as they soften into the simmering liquid.
The step that matters
Gradually add the cooking water to the butter and flour. Adding liquid slowly to a butter and flour paste lets the starch disperse evenly, preventing lumps and giving a smooth, thickened sauce.
Swap the onion
How well each one fits the dish's main ingredients (butter, flour, pepper, milk):
- Potatofits better
- Capsicumfits better
- Chivefits better
- Onionthe original
Fit is the average pairing score against butter, flour, pepper, milk. 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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