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Brown Onion Sauce

A sauce made from 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.

Make the sauce

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

  2. Cook gently over medium heat until the onions are lightly colored.

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

  4. Strain the sauce to remove the onions.

  5. Season with cayenne pepper 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 cook, and add body and savory flavor to the sauce.
Butter
Adds richness and carries flavor while the onions gently cook and color.
Brown gravy
Forms the liquid base of the sauce and adds savory, meaty depth.

The step that matters

Cook the onions gently until lightly colored. Cooking over medium heat rather than high lets the onions soften and turn sweet through gentle browning, while avoiding scorching and bitter flavors that would carry into the sauce.

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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