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Dessert

To Clarify Sugar

A syrup made by dissolving sugar in water, clarifying it with egg whites, and removing the sediment.

From an old cookbook · modernised transcription
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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

Ingredients

Directions

  1. Dissolve the sugar in warm water, using ½ pint for every pound.

  2. Whip the egg whites and add them to the dissolved sugar.

  3. Heat the mixture until it boils, then add 1 teacup of cold water.

  4. Once it boils again, remove from heat and let it settle for 20 minutes.

  5. Skim the scum from the top and pour the syrup into a clean vessel, leaving sediment behind.

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

Fine white loaf sugar
Provides the sweetness and forms the syrup itself.
Egg whites
Coagulate when heated and trap impurities, which rise as scum that can be skimmed off.

The step that matters

Skimming and pouring off the syrup. Egg white that has coagulated must be left behind with the scum and sediment. Disturbing the settled layer or pouring too roughly stirs impurities back into the syrup, leaving it cloudy.

“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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