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To Clarify Sugar for Fruit Preserves

This method clarifies sugar for fruit preserves by dissolving, boiling, and skimming impurities.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 3 ingredients
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Why it works: Sugar and egg are a kitchen classic. They rank in the top 21% of all ingredient pairs, and cooks put them together in 122,807 recipes. Both carry 2-nonenal, which smells fatty, green. The science ↓

To Clarify Sugar for Fruit Preserves

Ingredients

Directions

Prepare the syrup

  1. Break the sugar into small pieces and place it in a preserving pan.

  2. Pour the water over the sugar and let it sit for a while before heating.

  3. Add the beaten egg white and stir until the sugar is completely dissolved.

Clarify and boil

  1. Bring to a boil, then add 1 pint of cold water and let it boil again.

  2. Remove from heat and let it settle for 15 minutes, then carefully skim off the scum.

  3. Return to heat and boil until thick or until it reaches candy stage.

Test and use

  1. To test, drop a little into cold water; if it hardens, it's ready.

  2. Alternatively, dip a wooden spoon into the sugar, then into cold water; if it snaps, add the fruit and boil immediately.

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 + eggtop 21% of all pairs
    Smell alikemoderate
    Cooked together122,807 recipes

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

Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs

What each ingredient does

Loaf sugar
Forms the sweet syrup that preserves the fruit and sets as it thickens.
Egg white
Its proteins coagulate when heated, trapping impurities so they can be skimmed off as scum.

The step that matters

Skimming off the scum after settling. Egg white binds impurities as it heats and rises as scum. Skimming only after the syrup has settled lets the impurities collect at the surface, leaving a clear syrup.

“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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