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How to Clear Soup Stock

A method to clarify soup stock by removing fat and scum.

From an old cookbook · modernised transcription
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How to Clear Soup Stock

Ingredients

Directions

Prepare

  1. Remove the fat from the stock.

  2. In a stew pan, combine the stock with the white and crushed shell of one egg.

  3. Beat the egg slightly and stir the mixture constantly over medium heat until it reaches boiling point.

Clarify and strain

  1. Reduce heat and let it simmer for 20 minutes.

  2. Remove the scum that forms on top.

  3. Strain the stock through double layers of cheesecloth over a fine strainer.

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

What each ingredient does

Egg white and shell
Egg white and shell collect fine particles and cloudiness as the stock heats, clearing it.

The step that matters

Stirring the stock as it heats. Stirring constantly keeps the egg white from setting on the bottom of the pan and scorching before it can gather the particles. Once the mixture reaches boiling, the egg raft rises and traps impurities, which is why the stock is left to simmer undisturbed.

“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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