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Dessert

Jam

Jam is a sweet preserve made by cooking fruit with sugar.

From an old cookbook · modernised transcription
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Jam

Ingredients

Directions

Prepare

  1. Choose strawberries, blackberries, or raspberries.

  2. For every 3 cups of fruit, add 2 cups of sugar for a sweeter jam, or use equal parts for a pound-for-pound ratio.

Cook

  1. Cook the mixture for 45 minutes, stirring frequently to prevent burning.

Jar and seal

  1. Once cooked, pour into airtight jars and seal with melted paraffin to exclude air.

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

Strawberries
Provide the main fruit flavour, colour and body of the jam.
Blackberries
Add fruit flavour, deep colour and body to the jam.
Raspberries
Add bright fruit flavour, colour and body to the jam.
Sugar
Adds sweetness, helps the jam set and acts as a preservative.

The step that matters

Stirring while the jam cooks. Sugar-rich fruit mixtures scorch easily on the bottom of the pot. Frequent stirring spreads the heat evenly and prevents burnt flavour.

“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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