Why it works: Onion and tomato are a kitchen classic. They rank in the top 8% of all ingredient pairs, and cooks put them together in 20,633 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Tripe Lyonnaise
Ingredients
Directions
Prepare
Cut the cold boiled tripe into neat squares.
Melt the butter in a frying pan.
Sauté the chopped onion until golden brown.
Cook
Add the tripe, chopped parsley, vinegar, salt, and cayenne.
Stir to prevent burning.
Serve
Cover the bottom of a platter with tomato sauce.
Add the tripe mixture.
Serve.
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 + tomatotop 8% of all pairsSmell alikemoderateCooked together20,633 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Parsley + tomatotop 8% of all pairsSmell alikemoderateCooked together5,398 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Onion + parsleytop 9% of all pairsSmell alikemoderateCooked together25,843 recipes
Shared aroma: 2,4-decadienal (seaweed).
-
Onion + vinegartop 14% of all pairsSmell alikemoderateCooked together18,226 recipes
Shared aroma: acetic acid (sour, vinegar).
-
Butter + saucetop 15% of all pairsSmell alikelowCooked together15,338 recipes
Shared aroma: ethanol (alcoholic, ethereal).
Butter and sauce barely smell alike, yet cooks put them together in 15,338 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 dish and carries the other flavours.
- Butter
- Adds richness and carries flavour while the onion and tripe cook.
- Onion
- Browning in the butter builds sweetness and savoury depth.
- Vinegar
- Adds sharp acidity that brightens the rich butter and tripe.
The step that matters
Sautéing the onion until golden brown. Onion that is pale or burnt tastes flat or bitter. Gentle, steady browning in butter develops sweetness and depth, so it should be stirred and watched rather than rushed over high heat.
Swap the parsley
How well each one fits the dish's main ingredients (butter, onion, vinegar, tomato, sauce):
- Garlicfits better
- Capersfits better
- Tarragonfits better
- Parsleythe original
Fit is the average pairing score against butter, onion, vinegar, tomato, sauce. 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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