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Brown Onion Sauce

A sauce made with butter, onions, brown gravy, and cayenne pepper.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 4 ingredients
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Why it works: Onion and pepper are a kitchen classic. They rank in the top 11% of all ingredient pairs, and cooks put them together in 68,474 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓

Brown Onion Sauce

Ingredients

Directions

Prepare

  1. Cut off both ends of the onions and slice them.

  2. Melt the butter in a saucepan and add the sliced onions.

Make the sauce

  1. Stew the onions over medium heat until lightly colored.

  2. Pour in the brown gravy and boil until the onions are tender.

  3. Strain the sauce, season with cayenne, and serve hot.

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.

  1. Onion + peppertop 11% of all pairs
    Smell alikemoderate
    Cooked together68,474 recipes

    Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).

  2. Butter + oniontop 15% of all pairs
    Smell alikemoderate
    Cooked together42,912 recipes

    Shared aroma: decanal (soap, orange peel).

  3. Butter + peppertop 21% of all pairs
    Smell alikemoderate
    Cooked together85,593 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

Onions
Soften and sweeten as they stew, and give the sauce its body and flavor.
Butter
Fat that cooks the onions gently and adds richness to the sauce.
Brown gravy
Liquid base that the onions simmer in, providing the sauce's savory flavor.

The step that matters

Stewing the onions until lightly colored. Cooking over medium heat slowly softens the onions and builds sweetness without scorching. Too much heat can burn the sugars, giving a bitter taste that the sauce cannot hide.

Swap the onion

How well each one fits the dish's main ingredients (butter, pepper):

  1. Capsicumfits better
  2. Potatofits better
  3. Carrotfits about as well
  4. Onionthe original

Fit is the average pairing score against butter, pepper. 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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