Why it works: Tomato and rice match in chemistry and in kitchens. They rank in the top 6% of all ingredient pairs, and cooks put them together in 3,065 recipes. Both carry trans-2-nonenal, which smells cardboard, fatty. The science ↓
Tomato Cream Soup
Ingredients
Directions
Make the tomato base
Combine tomatoes, rice, water, and pepper in a stew pan.
Boil slowly until the rice is tender.
Rub the mixture through a fine sieve.
Return the strained mixture to the heat.
Thicken and finish
Mix butter and flour until smooth.
Stir the mixture into the soup.
Dissolve baking soda in a little cold water.
Heat the milk to boiling.
Add the dissolved baking soda to the tomato mixture.
Add the hot milk to the mixture.
Serve immediately without reheating, ensuring both the tomatoes and milk are very hot to prevent curdling.
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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Tomato + ricetop 6% of all pairsSmell alikestrongCooked together3,065 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
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Butter + milktop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Rice + milktop 7% of all pairsSmell alikemoderateCooked together7,374 recipes
Shared aroma: 2-nonenal (fatty, green).
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Tomato + peppertop 7% of all pairsSmell alikemoderateCooked together17,923 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Rice + peppertop 12% of all pairsSmell alikemoderateCooked together8,379 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Tomatoes
- Provide the main body, acidity and flavour of the soup.
- Rice
- Cooks soft and breaks down, adding body and thickness to the purée.
- Butter
- Adds richness and fat, smoothing the flour-thickened base.
- Flour
- Thickens the soup, giving it a smooth, creamy body.
- Baking soda
- Neutralises tomato acidity so the milk is less likely to curdle.
- Milk
- Adds creaminess and richness, turning the soup into a cream soup.
The step that matters
Adding the hot milk to the tomato mixture. Tomato acid can make milk curdle when cold or cooled milk is added. Both the tomato mixture and the milk should be very hot, and the soup should be served immediately without reheating, to keep it smooth.
Swap the tomato
How well each one fits the dish's main ingredients (rice, pepper, butter, flour, milk):
- Potatofits better
- Capsicumfits better
- Asparagusfits better
- Tomatothe original
Fit is the average pairing score against rice, pepper, butter, flour, milk. 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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