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Dessert

Preserved Blueberries

A method for preserving blueberries in a sugar syrup by packing them in sterilized jars and boiling.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 3 ingredients
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Preserved Blueberries

Ingredients

Directions

Prepare

  1. Sterilize jars and fill them to overflowing with washed blueberries, shaking down to pack tightly.

  2. In a saucepan, combine 1 cup sugar with ½ cup water to make syrup.

  3. Place jars on a rack in a pot, ensuring they stand 3 inches deep in water.

Process and seal

  1. Heat water slowly; once hot, fill jars with syrup and cook for about 15 minutes.

  2. Add more syrup to jars if needed and seal while hot.

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

Blueberries
Form the fruit body of the preserve, holding their shape while cooked in syrup.
Sugar
Sweetens the fruit and, with the syrup, draws out water to help preserve it.

The step that matters

Keeping jars submerged while heating. Jars must stand fully covered by water at the right depth so the whole jar heats evenly. Sustained heat destroys spoilage microbes and helps create a seal as the contents cool.

“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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