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Onion Gravy

A savory gravy made with onions, butter, veal gravy, salt, and pepper.

From an old cookbook · modernised transcription
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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 ↓

Onion Gravy

Ingredients

Directions

  1. In a saucepan, melt the butter over medium heat.

  2. Add the sliced onions and fry them lightly until softened.

  3. Pour in the veal gravy and season with salt and pepper.

  4. Simmer until the mixture reduces to one-third.

  5. Skim off any grease and strain the gravy through a towel.

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. Onion + buttertop 15% of all pairs
    Smell alikemoderate
    Cooked together42,912 recipes

    Shared aroma: decanal (soap, orange peel).

  3. Onion + vealtop 17% of all pairs
    Smell alikelow
    Cooked together6,841 recipes

    Shared aroma: 2,4-decadienal (seaweed).

  4. Veal + peppertop 19% of all pairs
    Smell alikemoderate
    Cooked together10,049 recipes

    Shared aroma: 2-nonenal (fatty, green).

  5. 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 fry, adding body and flavour to the gravy.
Butter
Fat for frying the onions, adding richness and a rounded flavour.
Veal gravy
Forms the liquid base that reduces into a thicker, more concentrated sauce.

The step that matters

Simmer until the mixture reduces to one-third. Reducing concentrates flavour and thickens the gravy as water evaporates. Stopping too early leaves it thin and bland, while reducing too far makes it salty and sticky.

Swap the onion

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

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

Fit is the average pairing score against butter, veal, 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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