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To Clarify Calf’s Feet Stock

A clarified stock made from calf's feet, boiled, strained, and reduced with egg whites, sugar, and lemon.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 ingredients
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Why it works: Sugar and lemon are a kitchen classic. They rank in the top 18% of all ingredient pairs, and cooks put them together in 53,532 recipes. Both carry 2-nonenal, which smells fatty, green. The science ↓

To Clarify Calf’s Feet Stock

Ingredients

Directions

Prepare the stock

  1. Clean the calf's feet and remove the hooves.

  2. Place the feet in a pot with 1 gallon of cold water.

  3. Boil gently for 6 to 7 hours until the flesh separates from the bones and the liquid reduces by half.

  4. Strain the stock and let it cool, removing any fat from the top.

Clarify the stock

  1. In a clean saucepan, combine 1 quart of the stock with egg whites, sugar, and lemon juice.

  2. Heat gently without stirring until scum forms, then boil for 5 minutes.

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. Sugar + lemontop 18% of all pairs
    Smell alikelow
    Cooked together53,532 recipes

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

  2. Egg + lemontop 19% of all pairs
    Smell alikelow
    Cooked together44,316 recipes

    Shared aroma: (e,e)-2,4-decadienal (fatty, deep fried).

  3. Egg + sugartop 21% of all pairs
    Smell alikemoderate
    Cooked together122,807 recipes

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

Sugar and lemon barely smell alike, yet cooks put them together in 53,532 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

Calf's feet
Release gelatin and body into the water as they simmer, giving the stock its richness.
Egg whites
Coagulate as they heat, trapping suspended particles so they can be strained out for a clear stock.
Lemon juice
Adds acidity that helps the egg whites coagulate and brightens the finished stock.

The step that matters

Heat gently without stirring until scum forms. Stirring breaks up the egg white raft before it forms, so impurities stay suspended and the stock turns cloudy instead of clear. Gentle heating lets the raft rise and gather particles.

Swap the lemon

How well each one fits the dish's main ingredients (egg, sugar):

  1. Vanillafits better
  2. Raisinfits about as well
  3. Lemonthe original
  4. Datesfits less well

Fit is the average pairing score against egg, sugar. 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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