A delightful twist on the classic blackberry jam, incorporating a hint of lemon zest for added brightness.
Wash the blackberries thoroughly and place them in a large pot.
Use fresh, ripe blackberries for the best flavor.
Add the pectin to the blackberries, stirring constantly to combine.
Sprinkle the pectin evenly to avoid clumping.
Heat the mixture over high heat, stirring constantly, until it reaches a full boil.
A full boil is when the mixture continues to bubble even while stirring.
Add the sugar all at once, stirring to dissolve.
Ensure the sugar is fully dissolved before proceeding.
Bring the mixture back to a full boil and boil for 1 minute, stirring constantly.
This step ensures the jam sets properly.
Remove from heat and stir in the lemon zest.
Adding the zest off heat preserves its fresh flavor.
Ladle the hot jam into clean, hot jars, leaving 1/4 inch space at the top.
Use a funnel for easier filling and less mess.
Wipe the rims of the jars clean and seal with lids and rings.
Ensure the rims are clean to create a proper seal.
Process the jars in a boiling water bath for 10 minutes.
Make sure the water covers the jars by at least an inch.
Remove the jars and let them cool upright on a towel for 12 hours.
Check the seals after cooling to ensure they are airtight.