Name: Cream of Carrot Soup
Ingredients: 2 cups carrots, grated or cut into small pieces; 1 small onion, chopped; 1 tablespoon butter; 4 tablespoons flour; 1 tablespoon salt; ½ teaspoon white pepper; 2 cups carrot stock and pulp; 2 cups milk

Why it works: Carrot and onion are a kitchen classic. They rank in the top 6% of all ingredient pairs, and cooks put them together in 21,601 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓

Cream of Carrot Soup

Ingredients

Directions

Prepare the carrot base

Wash and scrape the carrots.
Cook the carrots and onion in boiling water until tender.
Press the mixture through a sieve to obtain 2 cups of stock and pulp.

Make the cream soup

Melt the butter in a separate pot.
Add the flour to the melted butter and stir until smooth.
Gradually add the carrot stock and pulp, stirring constantly.
Add the milk, salt, and white pepper, and heat through without boiling.

Recipe from a historical cookbook (Internet Archive).

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.

Carrot + oniontop 6% of all pairs

Smell alikemoderate

Cooked together21,601 recipes

Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Butter + milktop 7% of all pairs

Smell alikemoderate

Cooked together81,283 recipes

Shared aroma: (z)-4-heptenal (biscuit, cream).
Butter + flourtop 12% of all pairs

Smell alikelow

Cooked together124,287 recipes

Shared aroma: isobutyraldehyde (malty, green).
Carrot + flourtop 13% of all pairs

Smell alikemoderate

Cooked together8,029 recipes

Shared aroma: isobutyraldehyde (malty, green).
Flour + milktop 14% of all pairs

Smell alikelow

Cooked together78,219 recipes

Shared aroma: isobutyraldehyde (malty, green).

Butter and flour 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

Carrots: Provide the main flavor, color, and body of the soup once pressed through a sieve.
Flour: Thickens the butter and carrot liquid into a smooth, creamy soup as it cooks.
Butter: Adds richness and carries flavor, and forms the base for the flour roux.
Milk: Adds creaminess and softens the soup's flavor, making it smooth and mellow.

The step that matters

Heat through without boiling. Milk can curdle or scorch when boiled, and the flour-thickened base can turn grainy. Gentle heating keeps the soup smooth and creamy.

Swap the white pepper

How well each one fits the dish's main ingredients (carrot, onion, butter, flour, milk):

Parsleyfits better
Cinnamonfits better
Celeryfits better
White pepperthe original

Fit is the average pairing score against carrot, onion, 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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Cream of Carrot Soup