Name: White Bechanel Sauce
Ingredients: 1 quart good white stock; 1 onion; a few mushrooms; 1 sprig thyme; 1 sprig parsley; 1 blade mace; ¼ teaspoon salt; 1 pint thick or double cream; 1 tablespoon arrowroot (if using thin cream)

Why it works: Thyme and parsley match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 9,057 recipes. Both carry cuminaldehyde, which smells Spicy, cumin. The science ↓

White Bechanel Sauce

Ingredients

Directions

Make the stock

In a stew-pan, combine the white stock, onion, mushrooms, thyme, parsley, mace, and salt.
Boil until the stock is reduced by half and has extracted the flavors of the herbs, then strain.

Thicken and finish

In a clean stew-pan, add the thick cream and gradually mix in the reduced stock while stirring continuously over low heat until thickened.
If using thin cream, mix the arrowroot smoothly into it and let simmer for five minutes before adding to the stock.

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.

Thyme + parsleytop 1% of all pairs

Smell alikestrong

Cooked together9,057 recipes

Shared aroma: cuminaldehyde (Spicy, cumin).
Mushroom + thymetop 5% of all pairs

Smell alikemoderate

Cooked together2,557 recipes

Shared aroma: 1-octen-3-one (mushroom, metallic).
Thyme + arrowroottop 5% of all pairs

Smell alikestrong

Cooked together72 recipes

Shared aroma: coumarin (sweet, hay).
Parsley + arrowroottop 5% of all pairs

Smell alikestrong

Cooked together137 recipes

Shared aroma: coumarin (sweet, hay).
Onion + thymetop 7% of all pairs

Smell alikemoderate

Cooked together11,171 recipes

Shared aroma: coumarin (sweet, hay).

Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs

What each ingredient does

White stock: Forms the liquid base, and reducing it concentrates its flavor before it is combined with the cream.
Thick cream: Provides fat and body, giving the sauce its rich texture and smooth mouthfeel.
Arrowroot: Starch that thickens the cream when thin cream is used, so it sets without relying on fat.

The step that matters

Thicken over low heat while stirring. Gentle heat and constant stirring let the cream and reduced stock combine evenly and thicken smoothly; high heat or neglect can scorch the milk solids or cause curdling and lumps.

Swap the mace

How well each one fits the dish's main ingredients (onion, mushroom, thyme, parsley, cream, arrowroot):

Marjoramfits better
Capersfits better
Garlicfits better
Macethe original

Fit is the average pairing score against onion, mushroom, thyme, parsley, cream, arrowroot. 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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White Bechanel Sauce