Why it works: Carrot and pepper match in chemistry and in kitchens. They rank in the top 6% of all ingredient pairs, and cooks put them together in 14,555 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Brown Macaroni Soup
Ingredients
Directions
Prepare
Slice the onion or leek and carrot, and bundle the herbs.
Make the soup
Fry the vegetables and peppercorns in butter until browned but not burnt.
Sprinkle cornflour over the vegetables and pour in boiling stock, stirring until it boils.
Let it simmer for 1 hour.
If not brown enough, burn a little sugar in a spoon and stir it in.
Strain the soup through a wire sieve and return it to the saucepan.
Add macaroni and serve
Boil the macaroni in salted water for 20 minutes, strain, and cut into 1-inch pieces.
Add the macaroni to the soup and simmer for 15 minutes.
Season with salt and pepper if necessary, 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.
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Carrot + peppertop 6% of all pairsSmell alikestrongCooked together14,555 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Onion + carrottop 6% of all pairsSmell alikemoderateCooked together21,601 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Onion + peppertop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Butter + oniontop 15% of all pairsSmell alikemoderateCooked together42,912 recipes
Shared aroma: decanal (soap, orange peel).
-
Butter + sugartop 17% of all pairsSmell alikemoderateCooked together98,233 recipes
Shared aroma: guaiacol (smoky, sweet).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Butter
- Fat that browns the vegetables, adding a rich, toasty flavour to the base.
- Cornflour
- Starch that thickens the stock as it comes to the boil.
- Macaroni
- Pasta pieces that add body and bulk to the finished soup.
- Onion or leek
- Aromatic base that softens and browns, sweetening and deepening the stock.
- Carrot
- Vegetable that browns with the onion, adding sweetness and colour to the stock.
- Sugar
- Burnt sugar deepens the colour and adds a slight bitter caramel note if the soup is too pale.
The step that matters
Frying the vegetables in butter. Browning gives the soup its colour and flavour through the Maillard reaction and caramelisation. If the vegetables burn, the soup turns bitter, so they should be stopped once golden brown.
Swap the onion
How well each one fits the dish's main ingredients (butter, carrot, pepper, sugar):
- Capsicumfits better
- Parsnipfits better
- Potatofits better
- Onionthe original
Fit is the average pairing score against butter, carrot, pepper, sugar. 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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