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Dessert

Rock Candy

A sweet confection made by dissolving sugar in water and letting it crystallize on strings.

From an old cookbook · modernised transcription
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Rock Candy

Ingredients

Directions

Prepare

  1. Pour sugar into water until fully absorbed.

  2. Place strings across the surface of the mixture.

  3. Add flavoring if desired.

Grow the crystals

  1. Let it sit in a warm place.

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

Sugar
Dissolves into the water and later forms the crystals that make up the candy.
Water
Dissolves the sugar so it can recrystallise onto the strings as the liquid slowly evaporates.

The step that matters

Dissolving the sugar fully. Sugar must be completely dissolved in the water before the strings go in. Undissolved sugar can seed crystals in the wrong places and give a grainy, uneven result.

“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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