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 squares.
Cook
In a frying pan, melt the butter and sauté the chopped onion until browned.
Add the vinegar, salt, and cayenne, stirring to prevent burning.
Serve
Cover the bottom of a heated platter with tomato sauce, add the tripe mixture, and serve hot.
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.
-
Onion + tomatotop 8% of all pairsSmell alikemoderateCooked together20,633 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
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 + oniontop 15% of all pairsSmell alikemoderateCooked together42,912 recipes
Shared aroma: decanal (soap, orange peel).
-
Tomato + saucetop 15% of all pairsSmell alikelowCooked together5,469 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 provides its chewy, tender texture.
- Butter
- Carries the onion's flavour and browns in the pan, adding richness.
- Onion
- Browns in the butter to add sweetness and savoury depth.
- Vinegar
- Adds sharp acidity that brightens the rich butter and onion.
The step that matters
Stirring the onion and vinegar mixture. Onions and butter can scorch quickly over direct heat, and sugars in browned onion burn easily. Constant stirring keeps the pan temperature even so the onion browns evenly rather than turning bitter.
Swap the tomato
How well each one fits the dish's main ingredients (butter, onion, vinegar, sauce):
- Mustardfits better
- Shallotfits better
- Chivefits better
- Tomatothe original
Fit is the average pairing score against butter, onion, vinegar, 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.
You might also like
The free Flavor Lab newsletter: one surprising pairing a week and the molecular reason it works, in 60 seconds. No spam, unsubscribe anytime.
Prefer an account? Create a free account to save pairings and unlock the full chemistry.
Tomato Soup526 recipes
Cream of Tomato Soup107 recipes
Tomato Bisque61 recipes
Cream Tomato Soup28 recipes