Blackberry Jam
Ingredients
Directions
Prepare
Wash and cap the blackberries.
Run the berries through a meat grinder.
Combine the ground berries and sugar in a pot.
Cook and jar
Cook rapidly for 35 to 40 minutes.
Pour the jam into jars and seal.
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
- Blackberries
- Provide the fruit flavor, color and bulk of the jam.
- Sugar
- Sweetens the jam and, as it concentrates during cooking, helps it thicken and set.
The step that matters
Cook rapidly to the set point. The jam thickens only when enough water evaporates and the sugar and fruit reach the gel point. Undercooking leaves a runny jam, while overcooking can scorch the sugar and darken the flavor.
“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.
More blackberry jam recipes
You might also like
White Cake431 recipes
Pound Cake373 recipes
Orange Bundt Cake349 recipes
Spice Cake344 recipesThe free Flavor Lab newsletter: one surprising pairing a week and the molecular reason it works, in 60 seconds. No spam, unsubscribe anytime.
Prefer an account? Create a free account to save pairings and unlock the full chemistry.