Why it works: Chestnut and flour match in chemistry and in kitchens. They rank in the top 6% of all ingredient pairs, and cooks put them together in 517 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓
Rocky Mountain Chestnut Soup
Ingredients
Directions
The book gives no oven temperature. The 400°F (200°C) in the steps was added when the recipe was transcribed, as a starting point.
Prepare the chestnuts
Gash a cross on each chestnut and place them in a pan in the oven at 400°F (200°C) until the shells break open.
Remove the chestnut meat and cook it in boiling water until tender.
Press the chestnut meat through a sieve and add it to the boiled stock.
Make the soup
Melt butter in a pan and stir in flour.
Add the butter and flour mixture to the stock and boil for five minutes.
Add the cream and season with salt and pepper.
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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Chestnut + flourtop 6% of all pairsSmell alikestrongCooked together517 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Cream + buttertop 8% of all pairsSmell alikemoderateCooked together41,516 recipes
Shared aroma: delta-dodecalactone (sweet, creamy).
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Flour + buttertop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Meat + chickentop 13% of all pairsSmell alikelowCooked together2,449 recipes
Shared aroma: 1-octen-3-one (mushroom, metallic).
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Chestnut + peppertop 13% of all pairsSmell alikemoderateCooked together826 recipes
Shared aroma: ethyl octanoate (fruity, wine).
Flour and butter 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
- Chestnut meats
- Provide the main body and thick, starchy texture of the soup when pressed through a sieve.
- Chicken or veal stock
- Forms the liquid base that carries the flavour of the soup.
- Cream
- Adds richness and a smooth, silky mouthfeel.
- Flour
- Thickens the soup when cooked with butter and then boiled in the stock.
- Butter
- Adds fat and richness, and combines with flour to form the thickening roux.
The step that matters
Boil the flour and butter mixture in the stock for five minutes. Flour must be cooked for the starch to swell and thicken the liquid while losing its raw, pasty taste. Boiling briefly after adding it keeps the soup smooth and free of lumps.
Swap the chestnut
How well each one fits the dish's main ingredients (meat, chicken, cream, flour, butter, pepper):
- Almondfits about as well
- Beansfits about as well
- Cashew nutfits about as well
- Chestnutthe original
Fit is the average pairing score against meat, chicken, cream, flour, butter, pepper. 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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