Why it works: Onion and cucumber match in chemistry and in kitchens. They rank in the top 8% of all ingredient pairs, and cooks put them together in 6,050 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Cucumbers a LA Bourgeoise
Ingredients
Directions
Prepare the onions
Shred the onions very finely.
Fry the onions in butter until brown.
Drain the onions and place them in a stewpan.
Make the sauce
Add the consommé and sauce tournée to the onions and simmer until reduced by half.
Stir in a bit of butter and a squeeze of lemon juice.
Add coarse sea salt if needed.
Serve
Pour the hot mixture over the prepared cucumbers.
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 + cucumbertop 8% of all pairsSmell alikestrongCooked together6,050 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Lemon + cucumbertop 9% of all pairsSmell alikestrongCooked together2,067 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
-
Butter + saucetop 15% of all pairsSmell alikelowCooked together15,338 recipes
Shared aroma: ethanol (alcoholic, ethereal).
-
Onion + buttertop 15% of all pairsSmell alikemoderateCooked together42,912 recipes
Shared aroma: decanal (soap, orange peel).
-
Butter + lemontop 16% of all pairsSmell alikemoderateCooked together41,227 recipes
Shared aroma: 3-hexenal (apple, fruity).
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
- Onions
- Browning in butter builds a sweet, deep flavour as the sauce reduces.
- Consommé
- Provides savoury liquid that reduces into the body of the sauce.
- Sauce tournée
- Thickens the liquid and gives the sauce body and a rich texture.
- Butter
- Adds richness and a smooth finish to the sauce.
The step that matters
Simmer until reduced by half. Reducing concentrates flavour and thickens the liquid. Stopping too early leaves the sauce thin and bland, while overcooking can make it too salty or sticky once seasoned.
Swap the lemon
How well each one fits the dish's main ingredients (onion, butter, sauce, cucumber):
- Avocadofits better
- Coconutfits better
- Mangofits better
- Lemonthe original
Fit is the average pairing score against onion, butter, sauce, cucumber. 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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