Name: Gravy for Boiled Meat
Ingredients: ½ pint cooking liquid; 2 tablespoons flour; 2 tablespoons butter; 1 tablespoon finely chopped pickled gherkins or walnuts; 2 teaspoons minced parsley; 1 teaspoon mustard; 1 teaspoon vinegar

Why it works: Walnut and parsley match in chemistry and in kitchens. They rank in the top 7% of all ingredient pairs, and cooks put them together in 865 recipes. Both carry 2,4-decadienal, which smells seaweed. The science ↓

Gravy for Boiled Meat

Ingredients

Directions

In a saucepan, combine the cooking liquid, flour, and butter.
Cook over medium heat, stirring until thickened.
Stir in the chopped gherkins or walnuts and minced parsley.
Mix the mustard with vinegar and add to the sauce.
Serve the gravy in a tureen, separate from the meat.

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.

Walnut + parsleytop 7% of all pairs

Smell alikestrong

Cooked together865 recipes

Shared aroma: 2,4-decadienal (seaweed).
Mustard + vinegartop 7% of all pairs

Smell alikemoderate

Cooked together14,067 recipes

Shared aroma: isobutyraldehyde (malty, green).
Parsley + mustardtop 8% of all pairs

Smell alikestrong

Cooked together2,588 recipes

Shared aroma: trans-2-hexenal (green, leafy).
Walnut + mustardtop 9% of all pairs

Smell alikestrong

Cooked together849 recipes

Shared aroma: eucalyptol (eucalyptus, herbal).
Flour + buttertop 12% of all pairs

Smell alikelow

Cooked together124,287 recipes

Shared aroma: isobutyraldehyde (malty, green).

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

Flour: Thickens the cooking liquid into a smooth gravy as it heats and stirs.
Butter: Adds fat for a rich mouthfeel and smooth, glossy texture.
Pickled gherkins or walnuts: Add a sharp, tangy bite that contrasts with the rich sauce.
Mustard: Adds sharp, pungent flavour that cuts through the richness.

The step that matters

Cook over medium heat, stirring until thickened. Flour needs to be stirred while heating so its starch swells evenly without lumps or scorching. Stopping too early leaves a raw floury taste, while too much heat can burn the bottom of the pan.

Swap the walnut

How well each one fits the dish's main ingredients (flour, butter, parsley, mustard, vinegar):

Lentilsfits better
Chickpeafits better
Cashew nutfits better
Walnutthe original

Fit is the average pairing score against flour, butter, parsley, mustard, vinegar. 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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Gravy for Boiled Meat